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Read moreSt-Athan (Vale of Glamorgan) weather
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Forecast days
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Today. Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Overcast changing to sunny in the afternoon. Sunrise: 07:01; Sunset: 19:11. UV: Moderate; Pollution: Low; No pollen data.
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Friday 24 September. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Partly cloudy. Sunrise: 07:02; Sunset: 19:08. UV: Low; Pollution: Low; No pollen data.
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Saturday 25 September. Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Overcast. Sunrise: 07:04; Sunset: 19:06. UV: Moderate; Pollution: Low; No pollen data.
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Sunday 26 September. Maximum daytime temperature: 20 degrees Celsius; Minimum nighttime temperature: 13 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: 07:06; Sunset: 19:04. UV: Moderate; Pollution: Low; No pollen data.
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Monday 27 September. Maximum daytime temperature: 17 degrees Celsius; Minimum nighttime temperature: 13 degrees Celsius. Light showers changing to hail showers in the afternoon. Sunrise: 07:07; Sunset: 19:02. UV: Moderate; Pollution: Low; No pollen data.
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Tuesday 28 September. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Cloudy changing to light showers by late morning. Sunrise: 07:09; Sunset: 18:59. UV: Low;
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Wednesday 29 September. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Partly cloudy changing to light showers by late morning. Sunrise: 07:10; Sunset: 18:57. UV: Moderate;
Seven day forecast for St-Athan
Today (23 September 2021)
at
| Time | Now | 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 | 20% | 20% | 10% | 10% | 10% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
| Temperature in degrees Celsius |
17°
|
17°
|
17°
|
18°
|
18°
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19°
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19°
|
19°
|
18°
|
17°
|
16°
|
15°
|
15°
|
15°
|
14°
|
| Feels like temperature in degrees Celsius | 14° | 14° | 15° | 16° | 16° | 17° | 16° | 16° | 15° | 15° | 14° | 14° | 13° | 13° | 13° |
| Wind direction and speed in miles per hour |
W
17
|
WNW
15
|
WNW
14
|
WNW
13
|
WNW
13
|
W
13
|
W
13
|
W
13
|
W
13
|
W
12
|
W
10
|
W
10
|
WNW
9
|
WNW
8
|
WNW
7
|
| Wind gust in miles per hour | 30 | 27 | 23 | 22 | 21 | 20 | 20 | 19 | 19 | 20 | 20 | 20 | 19 | 17 | 16 |
| Visibility | M | M | G | G | G | G | VG | VG | VG | VG | VG | VG | VG | VG | VG |
| Humidity | 92% | 93% | 89% | 85% | 81% | 73% | 73% | 76% | 77% | 81% | 84% | 84% | 84% | 85% | 86% |
| UV | 1 | 1 | 2 | 2 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | - | - | - | - |
Friday (24 September 2021)
at
| 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 | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% |
| Temperature in degrees Celsius |
13°
|
13°
|
13°
|
13°
|
13°
|
14°
|
14°
|
15°
|
15°
|
16°
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16°
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17°
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17°
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17°
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17°
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17°
|
18°
|
18°
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17°
|
17°
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17°
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17°
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17°
|
16°
|
| Feels like temperature in degrees Celsius | 12° | 12° | 12° | 12° | 12° | 13° | 13° | 13° | 13° | 14° | 14° | 15° | 15° | 15° | 15° | 16° | 16° | 16° | 16° | 16° | 16° | 16° | 16° | 16° |
| Wind direction and speed in miles per hour |
WNW
7
|
WNW
6
|
NW
6
|
WNW
6
|
WNW
6
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WNW
7
|
W
7
|
W
9
|
W
10
|
W
11
|
W
12
|
W
13
|
W
13
|
W
13
|
W
13
|
W
13
|
W
13
|
W
12
|
W
11
|
W
10
|
W
9
|
W
8
|
W
7
|
W
7
|
| Wind gust in miles per hour | 15 | 14 | 14 | 15 | 16 | 16 | 18 | 18 | 20 | 20 | 21 | 22 | 21 | 22 | 22 | 22 | 21 | 20 | 19 | 17 | 16 | 14 | 13 | 13 |
| Visibility | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | G | VG | G | G | G | G | G | G | G | G | G | G |
| Humidity | 87% | 88% | 90% | 89% | 89% | 89% | 90% | 89% | 87% | 84% | 86% | 87% | 89% | 91% | 92% | 93% | 92% | 93% | 95% | 95% | 96% | 96% | 96% | 96% |
| UV | - | - | - | - | - | - | - | - | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | - | - | - | - |
Saturday (25 September 2021)
at
| 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 | 10% | 20% | 20% | 20% | 20% | 20% | 10% | 10% | 10% |
| Temperature in degrees Celsius |
16°
|
16°
|
16°
|
15°
|
17°
|
18°
|
19°
|
17°
|
16°
|
| Feels like temperature in degrees Celsius | 15° | 15° | 16° | 16° | 16° | 18° | 18° | 17° | 15° |
| Wind direction and speed in miles per hour |
W
7
|
W
6
|
WSW
4
|
SSW
3
|
SSE
6
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SSE
8
|
SE
8
|
SE
7
|
SSE
6
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| Wind gust in miles per hour | 13 | 12 | 7 | 6 | 11 | 14 | 14 | 12 | 11 |
| Visibility | G | G | M | M | G | G | G | VG | G |
| Humidity | 96% | 97% | 98% | 97% | 93% | 84% | 82% | 86% | 91% |
| UV | - | - | - | - | 1 | 3 | 1 | - | - |
Sunday (26 September 2021)
at
| 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 | 10% | 10% | 10% | 10% | 10% | 30% | 10% | 40% |
| Temperature in degrees Celsius |
15°
|
15°
|
14°
|
16°
|
19°
|
19°
|
18°
|
17°
|
| Feels like temperature in degrees Celsius | 15° | 14° | 14° | 16° | 17° | 17° | 15° | 14° |
| Wind direction and speed in miles per hour |
SE
5
|
SE
4
|
SSE
5
|
SSW
8
|
SSW
11
|
SSW
13
|
S
13
|
S
14
|
| Wind gust in miles per hour | 9 | 8 | 9 | 14 | 19 | 22 | 24 | 26 |
| Visibility | G | G | G | G | VG | VG | G | M |
| Humidity | 95% | 96% | 96% | 89% | 78% | 76% | 84% | 89% |
| UV | - | - | - | 2 | 3 | 1 | - | - |
Monday (27 September 2021)
at
| 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 | 70% | 60% | 40% | 40% | 40% | 50% | 40% | 30% |
| Temperature in degrees Celsius |
16°
|
15°
|
13°
|
15°
|
16°
|
16°
|
15°
|
14°
|
| Feels like temperature in degrees Celsius | 13° | 12° | 11° | 12° | 13° | 13° | 13° | 12° |
| Wind direction and speed in miles per hour |
SW
14
|
WSW
12
|
WSW
11
|
WSW
12
|
WSW
15
|
WSW
15
|
SW
12
|
SW
11
|
| Wind gust in miles per hour | 27 | 23 | 22 | 24 | 29 | 29 | 23 | 20 |
| Visibility | G | G | G | G | VG | VG | VG | VG |
| Humidity | 88% | 85% | 84% | 74% | 67% | 67% | 74% | 80% |
| UV | - | - | - | 2 | 4 | 1 | - | - |
Tuesday (28 September 2021)
at
| 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 | 30% | 10% | 10% | 40% | 60% | 40% | 60% | 40% |
| Temperature in degrees Celsius |
14°
|
14°
|
13°
|
15°
|
15°
|
15°
|
14°
|
13°
|
| Feels like temperature in degrees Celsius | 12° | 12° | 11° | 12° | 12° | 12° | 11° | 11° |
| Wind direction and speed in miles per hour |
SSW
10
|
SSW
10
|
S
11
|
S
13
|
SSW
15
|
SW
16
|
SW
14
|
WSW
12
|
| Wind gust in miles per hour | 20 | 19 | 20 | 25 | 28 | 28 | 26 | 23 |
| Visibility | G | G | G | G | G | G | G | G |
| Humidity | 84% | 87% | 88% | 85% | 80% | 80% | 84% | 85% |
| UV | - | - | - | 1 | 2 | 1 | - | - |
Wednesday (29 September 2021)
at
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
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|
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|
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| Chance of precipitation | 10% | 10% | 10% | 40% | 40% | 40% | 10% | 10% |
| Temperature in degrees Celsius |
12°
|
12°
|
11°
|
13°
|
14°
|
15°
|
13°
|
13°
|
| Feels like temperature in degrees Celsius | 10° | 9° | 9° | 10° | 11° | 11° | 10° | 10° |
| Wind direction and speed in miles per hour |
W
11
|
W
12
|
W
12
|
W
14
|
W
16
|
W
16
|
W
13
|
WNW
12
|
| Wind gust in miles per hour | 22 | 22 | 23 | 27 | 30 | 30 | 26 | 23 |
| Visibility | G | G | G | G | G | VG | VG | G |
| Humidity | 86% | 85% | 84% | 77% | 71% | 69% | 76% | 81% |
| UV | - | - | - | 1 | 3 | 1 | - | - |
weather map
St-Athan
Detailed weather map
Forecast for HH:mm, EEE
Updated HH:mm (ZZZZ) on EEE dd MMM yyyy
Wales weather forecast
Headline:
Some rain today, but clear and dry overnight.
Today:
A largely cloudy start with patchy rain through the morning, this most persistent over high ground. Rain clearing southwards by the afternoon with sunny spells following behind from the north. Feeling rather warm in the sunshine with light winds. Maximum temperature 20 °C.
Tonight:
Staying dry during the evening and overnight with lengthy clear spells. Breezy at times with a little patchy low cloud and hill fog forming overnight. Minimum temperature 6 °C.
Friday:
Cloud, light rain, and drizzle soon arriving from the west on Friday morning and persisting throughout the day. Breezy, especially across the north coast. Maximum temperature 21 °C.
Outlook for Saturday to Monday:
Often cloudy with scattered showers and sunny spells on Saturday. Showers to start, then outbreaks of rain, heavy at times to follow on Sunday and into Monday. Feeling warm.
Updated:
UK long range weather forecast
A band of blustery, sometimes intense, showers pass over much of the UK through Monday, bringing a noticeable drop in temperatures for the oncoming week as it passes. As such, eastern areas are likely to start off warm and fine once patchy mist clears on Monday ahead of this. Breezy winds with the risk of gales for Northern Isles. A cyclonic pattern will likely develop from Tuesday and last into October, bringing largely unsettled condition across the UK with a very general northwest to southeast split: Showers and long spells of rain towards northern areas with the southeast perhaps seeing drier and sunnier weather. However, unsettled weather could still spread south with outbreaks of rain. Temperatures near average but may rise slightly towards the end of this period.
Updated:
Confidence is typically low through this period. Current signals suggest the higher pressure is more likely over the south during this period, giving generally dry and settle conditions. More settled conditions may spread northwards at times. Lower pressure in the north will bring periods of showers or longer spells along with stronger winds. Temperatures most likely around or above average.
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