Porth Tywyn Mawr (Sandy 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. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Today. Maximum daytime temperature: 10 degrees Celsius; Minimum nighttime temperature: 3 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Friday 26 April. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 4 degrees Celsius. Sunny changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Friday 26 April. Maximum daytime temperature: 9 degrees Celsius; Minimum nighttime temperature: 4 degrees Celsius. Sunny changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Saturday 27 April. Maximum daytime temperature: 10 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius. Sunny intervals changing to cloudy by lunchtime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Saturday 27 April. Maximum daytime temperature: 10 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius. Sunny intervals changing to cloudy by lunchtime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Sunday 28 April. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Sunny. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.Sunday 28 April. Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Sunny. 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 rain in the afternoon. 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 rain in the afternoon. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: Moderate.
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Tuesday 30 April. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Cloudy changing to light showers in the afternoon. Sunrise: ; Sunset: . UV: Moderate;Tuesday 30 April. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Cloudy changing to light showers in the afternoon. Sunrise: ; Sunset: . UV: Moderate;
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Wednesday 1 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Light showers changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate;Wednesday 1 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Light showers changing to cloudy by late morning. Sunrise: ; Sunset: . UV: Moderate;
Seven day forecast for Porth Tywyn Mawr (Sandy Beach)
| Time | 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% |
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7°
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6°
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6°
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5° | 4° | 3° |
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NE
7
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NE
7
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ENE
7
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10 | 12 | 11 |
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0.2 | 0.2 | 0.2 |
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4 | 4 | 4 |
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Direction of waves offshore
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VG | VG | VG |
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Humidity
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72% | 74% | 74% |
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UV
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- | - | - |
| 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% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | 10% | <5% | 10% | 10% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
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5°
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5°
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4°
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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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6°
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7°
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8°
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8°
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8°
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9°
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9°
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9°
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9°
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9°
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8°
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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° | 2° | 1° | 1° | 1° | 1° | 1° | 2° | 3° | 4° | 5° | 5° | 5° | 5° | 6° | 6° | 6° | 5° | 5° | 5° | 4° | 3° | 3° | 3° |
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ENE
8
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ENE
8
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ENE
9
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E
11
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E
9
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E
10
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ENE
9
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E
8
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E
9
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ENE
9
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NE
11
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NE
11
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NE
13
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NNE
14
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NNE
14
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NNE
14
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NNE
14
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NNE
13
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NE
12
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NE
11
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NE
10
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NE
9
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NE
9
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ENE
10
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14 | 15 | 17 | 18 | 16 | 16 | 14 | 13 | 14 | 14 | 16 | 17 | 19 | 21 | 20 | 21 | 20 | 19 | 18 | 16 | 16 | 15 | 16 | 16 |
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0.2 | 0.2 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
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3 | 3 | 3 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
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Direction of waves offshore
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VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
|
84% | 86% | 87% | 87% | 89% | 88% | 87% | 82% | 73% | 64% | 57% | 59% | 57% | 57% | 56% | 56% | 56% | 56% | 58% | 59% | 64% | 72% | 75% | 78% |
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UV
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- | - | - | - | - | - | - | 1 | 2 | 2 | 3 | 4 | 4 | 5 | 4 | 3 | 3 | 2 | 2 | 1 | 1 | - | - | - |
| Time | 00:00 | 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% | <5% | 10% | <5% | <5% | 10% | 10% | <5% | <5% |
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5°
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5°
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5°
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6°
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9°
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10°
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10°
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9°
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7°
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2° | 2° | 2° | 3° | 6° | 7° | 7° | 6° | 4° |
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ENE
10
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ENE
10
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ENE
9
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ENE
9
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ENE
12
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NE
13
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NE
12
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NNE
11
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NE
9
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15 | 15 | 15 | 15 | 19 | 21 | 20 | 18 | 13 |
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0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 |
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3 | 3 | 4 | 3 | 2 | 2 | 3 | 3 | 3 |
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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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82% | 85% | 89% | 85% | 65% | 58% | 57% | 64% | 81% |
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UV
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- | - | - | 1 | 3 | 4 | 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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<5% | <5% | <5% | 10% | 10% | <5% | <5% | <5% |
|
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7°
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6°
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7°
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9°
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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° | 3° | 5° | 7° | 8° | 8° | 7° | 6° |
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NNE
7
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NNE
7
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N
8
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NNW
10
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WNW
11
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W
11
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SW
14
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SSW
15
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11 | 11 | 12 | 18 | 20 | 21 | 23 | 24 |
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0.2 | 0.1 | 0.1 | 0.2 | 0.3 | 0.3 | 0.3 | 0.5 |
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3 | 3 | 3 | 3 | 3 | 3 | 2 | 3 |
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Direction of waves offshore
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VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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83% | 86% | 84% | 68% | 63% | 58% | 65% | 77% |
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UV
|
- | - | 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% | 20% | 20% | 50% | 50% | 50% |
|
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9°
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9°
|
9°
|
10°
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11°
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11°
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11°
|
10°
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6° | 6° | 6° | 7° | 7° | 8° | 7° | 7° |
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SSW
16
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SSW
16
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SSW
18
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S
21
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S
23
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S
21
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S
20
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S
17
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24 | 25 | 29 | 35 | 38 | 35 | 31 | 26 |
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0.6 | 0.6 | 0.7 | 0.9 | 1.0 | 1.0 | 1.1 | 0.8 |
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4 | 4 | 4 | 4 | 6 | 6 | 7 | 8 |
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Direction of waves offshore
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VG | VG | G | G | G | G | G | G |
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Humidity
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82% | 83% | 82% | 76% | 74% | 75% | 79% | 85% |
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UV
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- | - | 1 | 2 | 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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50% | 10% | 20% | 20% | 10% | 40% | 10% | 10% |
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10°
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9°
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10°
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12°
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14°
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14°
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13°
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10°
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7° | 6° | 7° | 9° | 11° | 12° | 11° | 9° |
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SSE
16
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SSE
16
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SSE
13
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SE
12
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SE
12
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S
10
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ENE
8
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E
9
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25 | 25 | 21 | 21 | 22 | 18 | 14 | 14 |
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0.6 | 0.8 | 0.8 | 0.5 | 0.3 | 0.3 | 0.2 | 0.3 |
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8 | 4 | 8 | 8 | 8 | 8 | 8 | 8 |
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Direction of waves offshore
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G | G | G | G | VG | VG | VG | G |
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Humidity
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83% | 81% | 83% | 74% | 64% | 66% | 73% | 86% |
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UV
|
- | - | 1 | 3 | 4 | 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% | 40% | 10% | 10% | 10% | 10% | 10% |
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10°
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9°
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10°
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12°
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14°
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14°
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13°
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11°
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8° | 7° | 8° | 10° | 12° | 12° | 11° | 9° |
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ENE
8
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ENE
9
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ENE
9
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WNW
10
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NNW
11
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W
12
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NNW
13
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NNW
12
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13 | 13 | 15 | 19 | 22 | 22 | 21 | 20 |
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0.3 | 0.3 | 0.4 | 0.4 | 0.6 | – | – | – |
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6 | 6 | 4 | 4 | 4 | – | – | – |
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Direction of waves offshore
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– | – | – |
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G | G | G | VG | VG | VG | VG | VG |
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Humidity
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89% | 91% | 91% | 81% | 75% | 75% | 78% | 85% |
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UV
|
- | - | 1 | 3 | 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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 Holyhead tidal station which is 2.3 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:
Turning drier overnight with clear skies and a rural frost.
This Evening and Tonight:
A few showers continuing this evening, mainly across central Wales, before easing into the night. Elsewhere, largely dry and chilly with clear periods. Turning frosty in rural inland areas with patchy fog. Minimum temperature 2 °C.
Friday:
Dry, chilly and mostly sunny to start. Cloud bubbling up with the odd shower in the north, drier elsewhere but turning cloudy. Light winds but still feeling rather cool. Maximum temperature 13 °C.
Outlook for Saturday to Monday:
Cloudier with rain or showers on Saturday. Some rain possible in the east on Sunday, drier further west. Sunnier spells on Monday with the odd shower, before turning cloudier later.
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:
