Time News
High pressure building for the weekend
After what feels like weeks and indeed months of wind and rain, there is some good news on the horizon.
Read morePorth 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: 17 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Cloudy changing to sunny intervals by early evening. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: High.Today. Maximum daytime temperature: 17 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Cloudy changing to sunny intervals by early evening. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; Pollen: High.
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Wednesday 8 May. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: High; Pollution: Low; Pollen: High.Wednesday 8 May. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: High; Pollution: Low; Pollen: High.
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Thursday 9 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: High; Pollution: Low; Pollen: High.Thursday 9 May. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: High; Pollution: Low; Pollen: High.
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Friday 10 May. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Cloudy changing to sunny by early evening. Sunrise: ; Sunset: . UV: High; Pollution: Moderate; Pollen: High.Friday 10 May. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Cloudy changing to sunny by early evening. Sunrise: ; Sunset: . UV: High; Pollution: Moderate; Pollen: High.
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Saturday 11 May. Maximum daytime temperature: 17 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: High; No pollen data.Saturday 11 May. Maximum daytime temperature: 17 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: High; No pollen data.
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Sunday 12 May. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: Moderate;Sunday 12 May. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: Moderate;
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Monday 13 May. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: Moderate;Monday 13 May. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Cloudy. Sunrise: ; Sunset: . UV: Moderate;
Seven day forecast for Porth Trecastell (Beach)
| Time | 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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Chance of precipitation
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10% | 10% | 10% | <5% | <5% | <5% | 10% | <5% | <5% | <5% | <5% | 30% | <5% | 10% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
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11°
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11°
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11°
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11°
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11°
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13°
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13°
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14°
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15°
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15°
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16°
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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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15°
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14°
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12°
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11°
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10°
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10° | 9° | 9° | 10° | 11° | 12° | 13° | 14° | 14° | 14° | 15° | 14° | 15° | 15° | 15° | 15° | 14° | 13° | 11° | 10° | 9° |
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N
7
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N
8
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N
6
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NNE
6
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NNE
5
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NNE
4
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NW
5
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NW
5
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WNW
6
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NW
7
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NW
7
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NW
8
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NNW
7
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N
7
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N
6
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N
6
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NNE
6
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NE
4
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ENE
4
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SE
4
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SE
4
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15 | 16 | 14 | 14 | 10 | 6 | 7 | 7 | 9 | 10 | 10 | 11 | 10 | 10 | 9 | 9 | 9 | 8 | 7 | 6 | 6 |
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0.5 | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.4 | 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 |
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8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
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Direction of waves offshore
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G | G | G | G | G | G | G | G | G | M | G | G | G | G | G | G | G | G | M | M | M |
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Humidity
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94% | 94% | 95% | 96% | 94% | 90% | 87% | 84% | 82% | 80% | 77% | 77% | 77% | 76% | 75% | 77% | 79% | 86% | 93% | 96% | 96% |
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UV
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- | - | - | 1 | 1 | 2 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 3 | 3 | 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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<5% | 10% | 10% | <5% | <5% | <5% | 10% | 10% | 10% |
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10°
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10°
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10°
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11°
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13°
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13°
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13°
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13°
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12°
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10° | 9° | 9° | 9° | 11° | 11° | 11° | 11° | 10° |
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S
5
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SSW
6
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S
6
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S
9
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SSW
11
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SSW
12
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SSW
12
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SSW
11
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SSW
10
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8 | 9 | 10 | 14 | 17 | 20 | 21 | 18 | 15 |
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0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.4 | 0.4 | 0.5 | 0.5 |
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8 | 8 | 8 | 8 | 8 | 8 | 5 | 4 | 4 |
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Direction of waves offshore
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M | M | M | G | G | G | M | G | G |
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Humidity
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96% | 96% | 97% | 94% | 85% | 81% | 84% | 86% | 91% |
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UV
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- | - | - | 1 | 3 | 6 | 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% | 10% | <5% | <5% | <5% | <5% |
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11°
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11°
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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° | 10° | 11° | 12° | 13° | 13° | 11° |
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S
10
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SSW
10
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SSW
10
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SSW
10
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SW
9
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SW
8
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SW
5
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S
4
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16 | 16 | 15 | 16 | 17 | 15 | 9 | 6 |
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0.5 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
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4 | 4 | 4 | 9 | 10 | 10 | 10 | 10 |
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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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93% | 93% | 92% | 85% | 80% | 77% | 81% | 92% |
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UV
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- | - | 1 | 3 | 6 | 4 | 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% | <5% | <5% | <5% | <5% | <5% |
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11°
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11°
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12°
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16°
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17°
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17°
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16°
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13°
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11° | 10° | 12° | 16° | 16° | 16° | 15° | 12° |
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SE
3
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E
4
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ENE
4
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SE
4
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SSW
6
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SW
7
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SSW
5
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SSE
6
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5 | 5 | 6 | 7 | 14 | 15 | 9 | 8 |
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0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
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10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 |
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Direction of waves offshore
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G | G | VG | VG | VG | VG | VG | G |
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Humidity
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92% | 93% | 88% | 73% | 67% | 69% | 76% | 88% |
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UV
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- | - | 1 | 3 | 6 | 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% | 10% | <5% | 10% | 10% | <5% | 10% |
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12°
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12°
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13°
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16°
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16°
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17°
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16°
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14°
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11° | 10° | 12° | 14° | 15° | 15° | 14° | 12° |
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SSE
7
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SSE
7
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SSE
7
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S
9
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SSW
10
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SSW
10
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S
9
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SSE
10
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10 | 10 | 11 | 16 | 19 | 18 | 15 | 14 |
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0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 |
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9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
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Direction of waves offshore
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G | G | VG | G | VG | VG | VG | VG |
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Humidity
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90% | 91% | 85% | 76% | 72% | 72% | 77% | 86% |
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UV
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- | - | 1 | 4 | 6 | 4 | 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% | 10% | 10% | 10% | 10% | 10% |
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13°
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13°
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14°
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15°
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15°
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15°
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14°
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13°
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11° | 11° | 11° | 12° | 13° | 13° | 12° | 11° |
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S
10
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S
11
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S
12
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S
13
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SSW
14
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S
14
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S
13
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SSW
12
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14 | 17 | 18 | 22 | 24 | 23 | 22 | 18 |
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0.2 | 0.2 | 0.3 | 0.2 | 0.2 | – | – | – |
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8 | 8 | 8 | 8 | 8 | – | – | – |
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Direction of waves offshore
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– | – | – |
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VG | VG | VG | VG | G | G | G | G |
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Humidity
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86% | 87% | 85% | 82% | 81% | 82% | 86% | 90% |
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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% | 10% | 20% | 20% | 10% | 10% |
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12°
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12°
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12°
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13°
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13°
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14°
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13°
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12°
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11° | 10° | 10° | 11° | 11° | 12° | 11° | 10° |
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SSW
10
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SW
10
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WSW
9
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N
10
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WSW
10
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WSW
12
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SSE
11
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NE
11
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15 | 15 | 15 | 17 | 19 | 21 | 17 | 16 |
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– | – | – | – | – | – | – | – |
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– | – | – | – | – | – | – | – |
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Direction of waves offshore
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– | – | – | – | – | – | – | – |
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G | G | G | G | G | VG | VG | G |
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Humidity
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92% | 91% | 88% | 82% | 77% | 76% | 79% | 87% |
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UV
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- | - | 1 | 3 | 4 | 3 | 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
Tide times
for Tue 7 May
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
for Wed 8 May
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
for Thu 9 May
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
for Fri 10 May
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
for Sat 11 May
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
for Sun 12 May
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
for Mon 13 May
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
for Tue 14 May
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
for Wed 15 May
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
for Thu 16 May
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
for Fri 17 May
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.
Porth Trecastell (Beach) weather map
View the weather with our interactive map
Loading map…
Wales weather forecast
Headline:
Turning drier overnight with some mist and fog patches.
This Evening and Tonight:
Showers generally easing this evening leaving a largely dry night with some clear spells. Rather mild, though chillier under prolonged clear spells with some mist and fog developing. Minimum temperature 7 °C.
Tuesday:
A mostly dry start with sunny spells developing through the day. A few showers possible in the afternoon though less heavy than on Monday. Feeling pleasant in the sunshine. Maximum temperature 19 °C.
Outlook for Wednesday to Friday:
High pressure dominates the weather this week bringing settled conditions and lots of dry weather. Plenty of warm sunshine and light winds. Mild overnight with some fog possible.
Updated:
UK long range weather forecast
The coming weekend will probably remain fine for many, with some spells of sunshine for most and it will continue to feel warm, especially in parts of the south and east where temperatures are likely to remain in the mid-20's. Some areas of cloud are likely, especially around some coasts and perhaps later in northwest Scotland, with an increasing risk of a few showers here too. Following this spell of pleasant May weather though, it's all change the following week with conditions likely to turn more changeable across the country, with rainfall likely to be above average in most areas. Some of the rain is likely to be heavy and a few thunderstorms are also likely. Temperatures will return back closer to normal for May.
Updated:
For the end of May and the start of June, it will probably start off fairly unsettled with rain or showers for many, but also some sunny spells between them, and slightly-above average temperatures. Through the period there are some signs that conditions could become a little more settled in the south and east, with most of the rain reserved for the north and west. With a strong sun at this time of year, it will feel warm in any sunshine.
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