Porth Trecastell (Beach) (Isle of Anglesey) weather
Find a forecast
Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.
- Head to a lifeguarded beach; check the RNLI lifeguarded beach tool
- Follow RNLI Float to Live advice if you find yourself struggling in the water
- Know what to do if you get caught in a rip current (RNLI)
- Check the tide times to avoid getting cut off by the tide coming in
- Call 999 and ask for the coastguard in an emergency
- Learn more about staying safe at the beach
Forecast days
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Today. Maximum daytime temperature: 10 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Today. Maximum daytime temperature: 10 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Saturday 27 April. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Saturday 27 April. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Sunday 28 April. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Sunny intervals changing to overcast by nighttime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Sunday 28 April. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Sunny intervals changing to overcast by nighttime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Monday 29 April. Maximum daytime temperature: 12 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Cloudy changing to light showers by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Monday 29 April. Maximum daytime temperature: 12 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Cloudy changing to light showers by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Tuesday 30 April. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Tuesday 30 April. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Wednesday 1 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Cloudy changing to light rain by nighttime. Sunrise: ; Sunset: . UV: Moderate;Wednesday 1 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Cloudy changing to light rain by nighttime. Sunrise: ; Sunset: . UV: Moderate;
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Thursday 2 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Cloudy changing to sunny by early evening. Sunrise: ; Sunset: . UV: Moderate;Thursday 2 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Cloudy changing to sunny by early evening. Sunrise: ; Sunset: . UV: Moderate;
Seven day forecast for Porth Trecastell (Beach)
| Time | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
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| Weather symbols |
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Chance of precipitation
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<5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
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5°
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7°
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8°
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9°
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9°
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10°
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10°
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10°
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10°
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9°
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9°
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8°
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7°
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6°
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6°
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6°
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2° | 3° | 4° | 6° | 6° | 7° | 7° | 7° | 7° | 6° | 6° | 5° | 5° | 4° | 3° | 3° |
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ENE
10
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ENE
12
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ENE
12
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ENE
12
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NE
12
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NE
12
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NE
12
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NE
12
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NE
12
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NE
12
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NE
12
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NE
11
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NE
9
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NE
8
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NE
7
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NE
7
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18 | 18 | 19 | 18 | 18 | 19 | 18 | 19 | 19 | 20 | 19 | 19 | 17 | 17 | 16 | 17 |
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0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 |
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13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 11 | 2 | 8 | 11 | 13 | 13 |
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Direction of waves offshore
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VG | VG | VG | E | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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75% | 68% | 61% | 56% | 54% | 52% | 52% | 53% | 53% | 57% | 59% | 62% | 67% | 73% | 76% | 78% |
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UV
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2 | 2 | 3 | 4 | 4 | 5 | 5 | 4 | 3 | 2 | 2 | 1 | 1 | - | - | - |
| Time | 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 | 06:00 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
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| Weather symbols |
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Chance of precipitation
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<5% | 10% | 10% | <5% | <5% | 10% | <5% | <5% | <5% | 10% | <5% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | <5% | 10% | 10% | <5% | <5% | <5% |
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5°
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5°
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5°
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4°
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4°
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4°
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5°
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5°
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7°
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8°
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9°
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10°
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10°
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10°
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11°
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11°
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10°
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10°
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10°
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9°
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8°
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8°
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7°
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7°
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3° | 2° | 2° | 2° | 2° | 2° | 2° | 3° | 4° | 5° | 7° | 7° | 8° | 8° | 8° | 8° | 8° | 8° | 7° | 7° | 6° | 5° | 5° | 5° |
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ENE
8
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NE
7
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ENE
7
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ENE
7
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ENE
7
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ENE
6
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ENE
7
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ENE
7
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ENE
8
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ENE
9
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ENE
9
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ENE
10
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E
10
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NE
11
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ENE
11
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ENE
11
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ENE
11
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NE
10
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NE
11
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NE
10
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NE
8
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NE
8
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NE
8
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NE
8
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17 | 15 | 14 | 12 | 11 | 12 | 12 | 13 | 14 | 14 | 15 | 17 | 17 | 19 | 19 | 19 | 19 | 18 | 18 | 17 | 16 | 16 | 16 | 15 |
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0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 |
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13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 |
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Direction of waves offshore
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VG | VG | VG | G | G | G | G | G | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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82% | 85% | 87% | 87% | 87% | 87% | 87% | 85% | 79% | 73% | 66% | 60% | 58% | 56% | 56% | 56% | 58% | 60% | 62% | 65% | 71% | 75% | 79% | 79% |
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UV
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- | - | - | - | - | - | 1 | 1 | 2 | 2 | 3 | 4 | 4 | 5 | 4 | 3 | 2 | 2 | 1 | 1 | 1 | - | - | - |
| Time | 00:00 | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
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| Weather symbols |
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Chance of precipitation
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20% | 20% | <5% | <5% | <5% | <5% | <5% | <5% | 10% |
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7°
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7°
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6°
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7°
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10°
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10°
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10°
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10°
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9°
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4° | 4° | 3° | 5° | 7° | 8° | 8° | 7° | 6° |
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NE
9
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NNE
8
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NNE
7
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N
7
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NNW
11
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NW
11
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W
11
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SW
14
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SSW
15
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17 | 15 | 15 | 13 | 21 | 22 | 21 | 21 | 23 |
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0.1 | 0.2 | 0.2 | 0.1 | 0.2 | 0.2 | 0.2 | 0.3 | 0.8 |
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12 | 12 | 10 | 12 | 2 | 5 | 4 | 2 | 4 |
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Direction of waves offshore
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VG | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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80% | 82% | 84% | 83% | 63% | 58% | 59% | 66% | 77% |
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UV
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- | - | - | 1 | 3 | 5 | 3 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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10% | 10% | 10% | 30% | 20% | 20% | 50% | 20% |
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9°
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9°
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9°
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11°
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12°
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12°
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12°
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11°
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6° | 6° | 6° | 7° | 8° | 8° | 8° | 7° |
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SSW
15
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S
16
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S
19
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S
22
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S
23
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S
21
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S
18
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SSE
17
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22 | 25 | 29 | 36 | 39 | 36 | 28 | 27 |
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0.9 | 1.1 | 1.2 | 1.2 | 1.3 | 1.4 | 1.3 | 1.1 |
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5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 |
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Direction of waves offshore
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VG | G | G | VG | G | G | G | G |
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Humidity
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82% | 85% | 82% | 74% | 69% | 68% | 74% | 77% |
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UV
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- | - | 1 | 3 | 4 | 2 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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20% | 20% | 10% | 10% | 10% | 10% | 10% | 10% |
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10°
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10°
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10°
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12°
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14°
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15°
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13°
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11°
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7° | 7° | 7° | 9° | 11° | 12° | 11° | 9° |
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SSE
17
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SE
16
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SE
15
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SE
15
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SE
14
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SE
13
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ESE
10
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E
8
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27 | 24 | 23 | 25 | 25 | 23 | 16 | 13 |
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1.1 | 1.1 | 0.9 | 0.8 | 0.7 | 0.6 | 0.5 | 0.4 |
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8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 |
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Direction of waves offshore
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G | G | G | VG | VG | VG | VG | G |
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Humidity
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78% | 79% | 78% | 71% | 63% | 61% | 71% | 82% |
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UV
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- | - | 1 | 3 | 4 | 2 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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<5% | <5% | 10% | 10% | 10% | 10% | 10% | 50% |
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10°
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9°
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10°
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13°
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14°
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15°
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13°
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12°
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8° | 7° | 8° | 11° | 13° | 13° | 12° | 10° |
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E
9
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E
9
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E
9
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E
9
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ENE
9
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NE
10
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NNE
10
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NE
9
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13 | 13 | 14 | 16 | 18 | 19 | 17 | 16 |
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0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 |
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7 | 7 | 7 | 7 | 7 | 8 | 8 | 7 |
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Direction of waves offshore
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G | G | G | VG | VG | G | G | G |
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Humidity
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87% | 92% | 90% | 80% | 74% | 74% | 82% | 90% |
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UV
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- | - | 1 | 3 | 4 | 2 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
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Chance of precipitation
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10% | 30% | 10% | 10% | 10% | 10% | 10% | 10% |
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11°
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10°
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11°
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13°
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14°
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14°
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14°
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12°
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9° | 9° | 9° | 11° | 12° | 12° | 12° | 10° |
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NE
10
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NW
10
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NW
9
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NNW
11
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NNE
12
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NNE
12
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NW
11
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NNW
10
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16 | 17 | 17 | 20 | 22 | 22 | 19 | 17 |
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0.3 | – | – | – | – | – | – | – |
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7 | – | – | – | – | – | – | – |
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Direction of waves offshore
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– | – | – | – | – | – | – |
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G | G | G | VG | VG | G | VG | G |
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Humidity
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92% | 92% | 91% | 83% | 79% | 77% | 80% | 87% |
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UV
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- | - | 1 | 2 | 4 | 2 | 1 | - |
Our weather symbols tell you the weather conditions for any given hour in the day or night. This means that the symbol for 9am shows you what you will see from 9am to 10am.
Chance of precipitation represents how likely it is that rain (or other types of precipitation, such as sleet, snow, hail or drizzle) will fall from the sky at a certain time.
This number shows the air temperature for the time period. You can see the temperature in Celsius or Fahrenheit by using the dropdown menu.
Feels like temperature considers other factors, such as wind speed and humidity. This gives you a better idea of how the temperature will actually feel at the time.
Wind gust shows the highest wind speed that you should encounter at that time, as winds peak and lull.
Strong winds are shown in bold for speeds of 29 mph or more.
The arrow shows the direction the wind is blowing. The letters show the direction the wind is blowing from (on a standard 16-point compass).
The number represents the average wind speed expected at that time.
The arrow shows the direction of the wind (up is north). If the arrow points from land to sea, the wind will be blowing out to sea (‘offshore’). The number is the average wind speed.
Beware of offshore winds if you are using inflatables, paddle boards or kayaks. These winds can blow you out to sea. Read more about how wind will affect you at the beach.
Visibility measures the distance at which an object can be clearly seen.
| VP (Very Poor) | Less than 1 km |
| P (Poor) | 1.1 km to 4 km |
| M (Moderate) | 4.1 km to 10 km |
| G (Good) | 10.1 km to 20 km |
| VG (Very Good) | 20.1 km to 40 km |
| E (Excellent) | Greater than 40 km |
Humidity is the amount of water vapor in the air. If there is a lot of water vapour, the humidity will be high. The higher the percentage of humidity, the wetter it will feel outside.
UV exposure index and the protection required to help keep you safe:
No risk of UV - It’s safe to stay outside. Low - You can safely stay outside. Consider sunscreen in direct sunlight. Moderate - Take care during midday hours and do not spend too much time in the sun unprotected. Sunscreen advised. High - Seek shade during midday hours, cover up and wear sunscreen. Very high - Spend time in the shade between 11am and 3pm. Shirt, sunscreen and hat are essential. Extreme - Avoid being outside during midday hours. Shirt, sunscreen and hat essential.
This is the average height of the waves, 1-2 miles out to sea. The height of the waves can vary. The individual waves out to sea or at the beach can be higher than this number. If you are close to the water, keep an eye on the waves to stop you or your belongings being swept away.
Read more about calculating the expected height of the waves at the beach.
This is the average number of seconds between one wave and the next, 1-2 miles out to sea. A long wave period (more than 10 seconds) means the waves at the beach may be more powerful. Lifeguards can give you advice on waves if you’re planning to go into the water.
Read more about the period of waves.
The arrow shows the average direction of the waves 1-2 miles out to sea. It indicates how sheltered the beach will be from these waves. If the arrow points towards land, most of the waves’ power will reach the beach. If the arrow is parallel to or pointing away from land, the wave height is likely to be lower on the beach than it is offshore.
Lifeguards can give you advice on waves if you’re planning to go into the water.
Forecast row information
Tide times
Time Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
UK video forecast
Wales weather forecast
Headline:
Sunny or bright spells and the odd shower further north.
Today:
A chilly but largely dry start. Sunny spells in the north with showers breaking out in the afternoon. Turning cloudier but remaining dry in the south. Staying rather cool with light winds. Maximum temperature 12 °C.
Tonight:
Mostly dry this evening with some late sunny spells in the north. Cloudier in the south overnight with showery outbreaks of rain through the early hours. Chilly in the north. Minimum temperature 3 °C.
Saturday:
Often cloudy to start with some patchy rain, breaking to leave some bright spells and a scattering of showers by the afternoon. Feeling cold under the cloud. Maximum temperature 12 °C.
Outlook for Sunday to Tuesday:
Spells of rain possible overnight into Sunday then brighter spells. Odd shower on Monday before turning cloudier on Tuesday with rain arriving later. Temperatures returning closer to average. Breezy.
Updated:
UK long range weather forecast
The period is likely to start with areas of organised rain and/or showers in the west, and largely dry conditions in the east although a scattering of showers developing by day. As the week progresses thes more organised areas of rain and showers are likely to slide southeast to affect southern parts of the UK, with drier weather in northern, especially northwestern UK Winds will gradually turn from southerly to easterly, with a chance of rain or even thundery showers for a time in the east and southeast. Temperatures likely to trend upwards, with the chance of a warm to very warm spell in some southern and eastern parts, before conditions probably turn gradually drier, cooler and more settled from the west towards the end of the period.
Updated:
In this period, the chances of unsettled weather are slightly less than usual in the north and about the same as usual further south. Therefore, some spells of wetter weather are likely for all, but perhaps especially southern areas with the driest conditions probably further north. Temperatures probably near average though with some cooler interludes possible. Also worth noting that average temperatures themselves rise by around 1C per week at this time of year.
Updated:
Nearest forecasts
- Llanfaelog - Porth Nobla (Beach) 0.3 miles
- Llanfaelog 0.6 miles
- Rhosneigr (Beach) 1.2 miles
- Rhosneigr - Traeth Crigyll (Beach) 1.8 miles
- Aberffraw Bay (Traeth Mawr) (Beach) 2.3 miles
- Rhoscolyn - Borthwen (Beach) 4.6 miles
- Mona 6.2 miles
- Llanddwyn (Newborough) 6.6 miles
- Trearddur Bay (Beach) 7.0 miles
- Stryd Y Facsen 8.1 miles