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Warning issued ahead of thunder risk
A Yellow Weather Warning has been issued for thunderstorms by the Met Office, as a plume of warm air will raise temperatures and increase the risk of thundery …
Read moreSt-Athan (Vale of Glamorgan) weather
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Forecast days
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Today. Maximum daytime temperature: 23 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Sunny. Sunrise: 04:59; Sunset: 21:27. UV: Very high; Pollution: Moderate; Pollen: Very high.Today. Maximum daytime temperature: 23 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Sunny. Sunrise: 04:59; Sunset: 21:27. UV: Very high; Pollution: Moderate; Pollen: Very high.
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Friday 9 June. Maximum daytime temperature: 25 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Sunny intervals changing to partly cloudy by nighttime. Sunrise: 04:59; Sunset: 21:28. UV: Very high; Pollution: Moderate; Pollen: Very high.Friday 9 June. Maximum daytime temperature: 25 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Sunny intervals changing to partly cloudy by nighttime. Sunrise: 04:59; Sunset: 21:28. UV: Very high; Pollution: Moderate; Pollen: Very high.
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Saturday 10 June. Maximum daytime temperature: 23 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: 04:58; Sunset: 21:29. UV: High; Pollution: Moderate; Pollen: High.Saturday 10 June. Maximum daytime temperature: 23 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: 04:58; Sunset: 21:29. UV: High; Pollution: Moderate; Pollen: High.
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Sunday 11 June. Maximum daytime temperature: 21 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Cloudy changing to sunny intervals by lunchtime. Sunrise: 04:58; Sunset: 21:29. UV: High; Pollution: Low; Pollen: Very high.Sunday 11 June. Maximum daytime temperature: 21 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Cloudy changing to sunny intervals by lunchtime. Sunrise: 04:58; Sunset: 21:29. UV: High; Pollution: Low; Pollen: Very high.
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Monday 12 June. Maximum daytime temperature: 22 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: 04:58; Sunset: 21:30. UV: High; Pollution: Low; Pollen: Very high.Monday 12 June. Maximum daytime temperature: 22 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: 04:58; Sunset: 21:30. UV: High; Pollution: Low; Pollen: Very high.
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Tuesday 13 June. Maximum daytime temperature: 25 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny. Sunrise: 04:57; Sunset: 21:31. UV: Very high;Tuesday 13 June. Maximum daytime temperature: 25 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny. Sunrise: 04:57; Sunset: 21:31. UV: Very high;
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Wednesday 14 June. Maximum daytime temperature: 24 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny. Sunrise: 04:57; Sunset: 21:31. UV: High;Wednesday 14 June. Maximum daytime temperature: 24 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Sunny. Sunrise: 04:57; Sunset: 21:31. UV: High;
Seven day forecast for St-Athan
| Time | 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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<5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
|
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19°
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21°
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22°
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23°
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23°
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23°
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22°
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21°
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20°
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18°
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17°
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15° | 17° | 18° | 19° | 19° | 19° | 19° | 19° | 16° | 15° | 14° |
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ENE
17
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E
16
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ENE
15
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ENE
14
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ENE
14
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ENE
14
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ENE
12
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ENE
12
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ENE
13
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ENE
14
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ENE
15
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26 | 23 | 23 | 21 | 21 | 22 | 22 | 24 | 29 | 29 | 30 |
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VG | G | VG | VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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58% | 55% | 52% | 46% | 44% | 44% | 47% | 52% | 53% | 57% | 63% |
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UV
|
8 | 7 | 6 | 5 | 4 | 2 | 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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<5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
|
|
15°
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14°
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13°
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12°
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12°
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11°
|
11°
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12°
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13°
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15°
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17°
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18°
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20°
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21°
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22°
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23°
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24°
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24°
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24°
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23°
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23°
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21°
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20°
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19°
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12° | 11° | 10° | 9° | 8° | 8° | 8° | 9° | 10° | 11° | 13° | 15° | 16° | 17° | 19° | 20° | 21° | 21° | 21° | 21° | 20° | 19° | 18° | 16° |
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ENE
15
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ENE
15
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ENE
15
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ENE
16
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ENE
16
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ENE
15
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ENE
15
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ENE
17
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ENE
17
|
ENE
17
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ENE
18
|
ENE
18
|
ENE
18
|
ENE
18
|
ENE
18
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E
16
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E
15
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E
14
|
E
13
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ENE
12
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ENE
13
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ENE
13
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ENE
13
|
ENE
13
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29 | 28 | 29 | 30 | 30 | 30 | 29 | 29 | 28 | 29 | 30 | 29 | 30 | 30 | 29 | 27 | 25 | 24 | 23 | 23 | 26 | 26 | 26 | 26 |
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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
|
66% | 71% | 75% | 78% | 79% | 80% | 81% | 80% | 76% | 72% | 68% | 65% | 60% | 58% | 55% | 52% | 50% | 49% | 50% | 52% | 55% | 59% | 63% | 67% |
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UV
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- | - | - | - | - | - | 1 | 1 | 3 | 4 | 5 | 6 | 7 | 8 | 7 | 6 | 5 | 4 | 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% | 30% | 30% | 20% | 10% |
|
|
18°
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17°
|
15°
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15°
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19°
|
21°
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21°
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20°
|
17°
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15° | 14° | 13° | 13° | 17° | 20° | 21° | 20° | 18° |
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ENE
12
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NE
13
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ENE
13
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ENE
13
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E
13
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E
11
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SSE
10
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S
9
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SW
4
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25 | 26 | 25 | 22 | 22 | 19 | 19 | 15 | 7 |
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VG | VG | VG | VG | VG | G | G | G | G |
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Humidity
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70% | 73% | 78% | 78% | 70% | 68% | 74% | 79% | 91% |
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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 symbol |
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Chance of precipitation
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10% | 10% | 10% | 10% | 10% | 10% | <5% | <5% |
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16°
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15°
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16°
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18°
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19°
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21°
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19°
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16°
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16° | 16° | 16° | 18° | 19° | 19° | 18° | 15° |
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WSW
5
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SW
6
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WSW
6
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WSW
9
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WSW
10
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WSW
10
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W
10
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W
8
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8 | 10 | 11 | 16 | 20 | 20 | 17 | 14 |
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G | G | G | G | VG | VG | VG | G |
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Humidity
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94% | 95% | 90% | 84% | 77% | 72% | 78% | 92% |
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UV
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- | - | 1 | 4 | 7 | 5 | 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% | 20% | 10% | 10% | <5% | <5% | <5% | <5% |
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15°
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15°
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16°
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19°
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20°
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21°
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21°
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18°
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14° | 14° | 15° | 18° | 20° | 20° | 19° | 17° |
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W
7
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WNW
6
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NW
6
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W
8
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SW
10
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NW
9
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NW
8
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WNW
6
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12 | 11 | 11 | 15 | 18 | 18 | 16 | 11 |
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M | P | G | G | VG | VG | VG | VG |
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Humidity
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95% | 96% | 90% | 83% | 75% | 72% | 74% | 82% |
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UV
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- | - | 1 | 4 | 7 | 5 | 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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<5% | <5% | <5% | <5% | <5% | <5% | 10% | <5% |
|
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17°
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16°
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17°
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21°
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23°
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23°
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22°
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19°
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16° | 15° | 17° | 20° | 22° | 23° | 22° | 18° |
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NNE
5
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NNW
6
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NE
6
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E
8
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SSE
9
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NNW
8
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N
6
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NNW
5
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10 | 10 | 10 | 16 | 19 | 18 | 12 | 10 |
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VG | VG | VG | VG | VG | VG | VG | VG |
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Humidity
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87% | 89% | 84% | 75% | 68% | 65% | 70% | 78% |
|
UV
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- | - | 1 | 5 | 8 | 5 | 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% | <5% | <5% | <5% | <5% | <5% | <5% |
|
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17°
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16°
|
16°
|
20°
|
22°
|
23°
|
22°
|
18°
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|
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16° | 15° | 16° | 19° | 21° | 22° | 21° | 18° |
|
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N
6
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ENE
6
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E
6
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ESE
9
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SE
9
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SE
8
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N
7
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N
5
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11 | 10 | 11 | 15 | 18 | 16 | 13 | 11 |
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VG | VG | VG | VG | VG | G | G | VG |
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Humidity
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82% | 83% | 77% | 70% | 62% | 62% | 64% | 75% |
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UV
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- | - | 2 | 5 | 7 | 4 | 2 | - |
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.
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.
St-Athan weather map
View the weather with our interactive map
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Wales weather forecast
Headline:
Dry with warm sunshine and rather windy around coasts.
Today:
Fine and dry, with any early morning cloud soon lifting and clearing eastwards, leaving another pleasant day with warm sunshine. A windy day, particularly gusty across southern coasts. Maximum temperature 22 °C.
Tonight:
Staying rather windy into the evening and overnight, particularly around coasts and across the hills. Gradually turning cloudier from the east overnight with some clear spells in the far west. Minimum temperature 9 °C.
Friday:
Another warm day with plenty of sunshine once cloud clears in the morning. Cloud building across the south later with a risk of showers. Windy around coasts and over hills. Maximum temperature 23 °C.
Outlook for Saturday to Monday:
Feeling very warm with temperatures climbing and winds easing. Lots of dry weather around although with the chance of heavy showers, perhaps thundery. Turning rather humid, perhaps feeling uncomfortable overnight.
Updated:
UK long range weather forecast
With a change of type taking place over the preceding weekend, the week is likely to start on a fairly cloudy but widely warm note, in places hot and humid, with a risk of scattered showers and thunderstorms. As the week progresses, this risk is likely to diminish, with the focus of these and the warmer weather also probably moving westwards with cooler, drier conditions resuming across eastern areas. By the end of the period, similar conditions to the present are most probable, with west and north-western areas seeing the best of the sunshine and warmth, whilst eastern areas are likely to be a bit cooler. Showers and thunderstorms may return to southern areas. Temperatures are expected to be well above average for most, with overnight minima particularly warm.
Updated:
Into late June and early July, the UK is generally most likely to see a resumption of recent dry weather with widespread mostly sunny and clear conditions, albeit with an increased threat of thunderstorms in the south early in this period. The chances of cloud affecting eastern areas, suppressing temperatures again, will also increase. Later on however, north-western areas could begin to see more in the way of rain, as Atlantic frontal systems become more influential. Temperatures are most likely to remain above normal for the time of year.
Updated:
Nearest forecasts
- Llantwit Major 1.9 miles
- Fontygary Bay (Beach) 3.6 miles
- Cowbridge 3.9 miles
- Cardiff International Airport 4.0 miles
- Cold Knap, Barry (Beach) 6.2 miles
- Dyffryn House Gardens 6.2 miles
- Barry 6.9 miles
- Whitmore Bay, Barry (Beach) 7.2 miles
- Barry Island Pleasure Park 7.6 miles
- Southerndown (Beach) 7.7 miles
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