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Strong winds and heavy rain mid-week
The Met Office have issued weather warnings for wind and rain ahead of an unsettled spell, with the potential for very strong winds on Wednesday.
Read morePorthmadog (Gwynedd) weather
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Forecast days
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Today. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Overcast changing to heavy rain by late morning. Sunrise: 07:22; Sunset: 18:47. UV: Low; Pollution: Low; No pollen data.
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Wednesday 5 October. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Heavy rain changing to sunny intervals by lunchtime. Sunrise: 07:24; Sunset: 18:45. UV: Low; Pollution: Low; No pollen data.
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Thursday 6 October. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: 07:26; Sunset: 18:43. UV: Low; Pollution: Low; No pollen data.
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Friday 7 October. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Cloudy changing to light showers by late morning. Sunrise: 07:28; Sunset: 18:40. UV: Low; Pollution: Low; No pollen data.
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Saturday 8 October. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 13 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: 07:29; Sunset: 18:38. UV: Low; No pollen data.
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Sunday 9 October. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 13 degrees Celsius. Light showers. Sunrise: 07:31; Sunset: 18:36. UV: Low;
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Monday 10 October. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Partly cloudy changing to light showers by late morning. Sunrise: 07:33; Sunset: 18:33. UV: Low;
Seven day forecast for Porthmadog
| Time | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
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10% | 20% | 60% | 60% | 20% | 10% | 20% | 90% | ≥95% | ≥95% | 90% | 90% | 90% | 60% | 90% | 90% | 60% | 70% | 60% | 70% | 60% | 30% |
|
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15°
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15°
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15°
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15°
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15°
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16°
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16°
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16°
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15°
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15°
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16°
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16°
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16°
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16°
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16°
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16°
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16°
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16°
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16°
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16°
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16°
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16°
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11° | 11° | 12° | 12° | 13° | 12° | 12° | 12° | 12° | 12° | 12° | 12° | 12° | 13° | 13° | 13° | 13° | 13° | 13° | 13° | 12° | 12° |
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SSW
24
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SSW
22
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SSW
19
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SSW
17
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SSW
16
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SSW
19
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SSW
20
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SSW
21
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SSW
22
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SSW
22
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SSW
21
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SSW
21
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SSW
20
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SW
19
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SW
17
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SW
16
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SSW
16
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SSW
16
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SSW
16
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SSW
19
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SSW
21
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SSW
22
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33 | 32 | 31 | 29 | 28 | 31 | 33 | 34 | 36 | 36 | 35 | 35 | 33 | 31 | 28 | 27 | 27 | 26 | 26 | 31 | 34 | 36 |
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VG | VG | VG | VG | VG | VG | VG | M | M | M | M | M | M | M | G | M | M | M | G | G | G | G |
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Humidity
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88% | 89% | 90% | 91% | 91% | 87% | 87% | 89% | 93% | 94% | 95% | 95% | 96% | 97% | 97% | 97% | 97% | 97% | 96% | 97% | 97% | 97% |
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UV
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- | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
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60% | 90% | 90% | 60% | 50% | 90% | 60% | 50% | 90% | 60% | 50% | 50% | 10% | 10% | 40% | 10% | 30% | 10% | 10% | 10% | 10% | <5% | <5% | <5% |
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16°
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16°
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16°
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16°
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16°
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16°
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16°
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15°
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15°
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14°
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13°
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13°
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13°
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14°
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14°
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14°
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14°
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14°
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13°
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12°
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12°
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12°
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12°
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12°
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12° | 12° | 12° | 11° | 11° | 11° | 11° | 11° | 11° | 11° | 10° | 10° | 10° | 10° | 10° | 10° | 10° | 10° | 9° | 9° | 9° | 9° | 9° | 9° |
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SSW
23
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SSW
24
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SSW
25
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SSW
27
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SSW
28
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SSW
30
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SW
27
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WSW
21
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WSW
20
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WSW
20
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W
20
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W
18
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WSW
20
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WSW
21
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WSW
21
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WSW
22
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WSW
21
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WSW
21
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W
20
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W
17
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W
16
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W
16
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W
16
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W
15
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38 | 40 | 42 | 44 | 46 | 49 | 45 | 35 | 34 | 33 | 34 | 31 | 32 | 34 | 35 | 36 | 35 | 35 | 33 | 31 | 29 | 29 | 28 | 27 |
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G | M | G | VG | G | G | G | VG | M | G | G | G | E | E | E | E | E | E | E | E | E | E | E | E |
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Humidity
|
96% | 96% | 96% | 95% | 95% | 93% | 91% | 89% | 88% | 88% | 82% | 80% | 76% | 72% | 68% | 61% | 62% | 62% | 66% | 66% | 67% | 68% | 71% | 73% |
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UV
|
- | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | - | - | - | - | - |
| Time | 00:00 | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
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<5% | <5% | <5% | <5% | 10% | 10% | 10% | 10% | 10% |
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12°
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12°
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13°
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14°
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15°
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16°
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16°
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15°
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15°
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9° | 9° | 10° | 10° | 11° | 11° | 12° | 11° | 11° |
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WSW
15
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WSW
16
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WSW
20
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SW
21
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SW
22
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SW
22
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SW
23
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SW
23
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SW
23
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28 | 29 | 32 | 33 | 35 | 36 | 37 | 36 | 36 |
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E | E | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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74% | 73% | 74% | 78% | 79% | 80% | 84% | 88% | 87% |
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UV
|
- | - | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
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10% | 10% | 10% | 40% | 40% | 40% | 30% | <5% |
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15°
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15°
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15°
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15°
|
15°
|
15°
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14°
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13°
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11° | 11° | 11° | 11° | 11° | 12° | 11° | 10° |
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SW
23
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SW
24
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SW
25
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SW
25
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WSW
22
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WSW
18
|
W
17
|
W
16
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37 | 38 | 39 | 40 | 36 | 30 | 26 | 25 |
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VG | VG | VG | G | G | VG | VG | VG |
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Humidity
|
88% | 88% | 87% | 84% | 83% | 73% | 73% | 72% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
<5% | <5% | 10% | 10% | 10% | 10% | 10% | 20% |
|
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12°
|
12°
|
12°
|
13°
|
14°
|
14°
|
14°
|
14°
|
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9° | 9° | 9° | 10° | 11° | 11° | 12° | 11° |
|
|
W
16
|
W
16
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W
15
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W
17
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WSW
16
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WSW
16
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SW
14
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SW
14
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25 | 25 | 24 | 27 | 27 | 24 | 20 | 21 |
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VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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77% | 79% | 80% | 76% | 74% | 73% | 77% | 83% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
20% | 20% | 40% | 50% | 80% | 80% | 40% | 40% |
|
|
14°
|
14°
|
14°
|
14°
|
14°
|
15°
|
14°
|
14°
|
|
|
11° | 10° | 10° | 10° | 11° | 11° | 11° | 11° |
|
|
SSW
15
|
SSW
18
|
SSW
19
|
SSW
20
|
SSW
20
|
SW
20
|
SW
20
|
WSW
19
|
|
|
23 | 27 | 29 | 32 | 32 | 32 | 32 | 30 |
|
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VG | VG | VG | VG | G | G | G | G |
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Humidity
|
85% | 85% | 86% | 84% | 83% | 84% | 85% | 83% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
20% | 30% | 10% | 30% | 10% | 30% | 30% | 10% |
|
|
14°
|
13°
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13°
|
13°
|
13°
|
13°
|
13°
|
12°
|
|
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11° | 11° | 11° | 10° | 10° | 10° | 9° | 9° |
|
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WSW
18
|
W
16
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WNW
15
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NW
17
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NW
19
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NW
20
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NW
19
|
NW
18
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28 | 26 | 24 | 28 | 32 | 32 | 30 | 28 |
|
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G | G | G | VG | VG | VG | VG | VG |
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Humidity
|
83% | 85% | 85% | 78% | 70% | 69% | 72% | 75% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
Chance of precipitation represents how likely it is that rain (or other types of precipitation, such as sleet, snow, hail and 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.
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 (Medium) | 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.
weather map
Porthmadog
Detailed weather map
Forecast for HH:mm, EEE
Updated HH:mm (ZZZZ) on EEE dd MMM yyyy
Loading map…
Wales weather forecast
Headline:
Wet and windy for most on Tuesday.
This Evening and Tonight:
Staying dry for most this evening but a few drizzly showers are possible in the south. Largely dry overnight with clear intervals, but some rain may reach Anglesey by dawn. Turning windier, particularly over the hills in northwest Wales. Mild. Minimum temperature 9 °C.
Tuesday:
Rain developing widely during the morning, becoming persistent and heavy at times in the west during the afternoon. Often lighter and more showery in the east. Windy at first. Maximum temperature 17 °C.
Outlook for Wednesday to Friday:
Very windy with possible gales on Wednesday. Early rain clearing, followed by sunny spells and isolated heavy showers. Blustery on Thursday and Friday with sunny spells and showers. Generally mild.
Updated:
UK long range weather forecast
This period is likely to be characterised by unsettled weather with sunny spells and showers or longer periods of rain for most areas. The heaviest and most frequent rain is expected in the west and northwest, while southern areas may remain drier on average. Confidence remains low, with the possibility of more settled conditions building across the UK at some point. Breezy conditions are expected throughout, with coastal gales possible, and the strongest winds are likely to be experienced in the north. Temperatures will generally be close to or slight above normal throughout the period. Early in the period, there is the possibility for cooler nights, bringing the chance of mist or fog in places.
Updated:
Confidence remains low for this period. Sunny spells and showers can be expected for much of the country with the possibility for longer periods of rain at times. However, the start of the period may be characterised by drier spells, bringing risk of fog and mist. Temperatures are likely to remain slightly above normal throughout the period.
Updated:
