Sully Island Weather Forecast, Vale of Glamorgan

Today 13 Nov Wales

A drier and brighter day for all with early mist and fog soon lifting. Plenty of sunny spells into the afternoon, although a few showers may spread across the north later. Feeling warm in the sunshine with light winds. Maximum Temperature 15C.

Tonight 13 Nov Wales

Increasingly cloudy this evening with a few spots of rain, before a band of persistent rain arrives from the south overnight. Becoming much breezier, and feeling chillier than recent nights. Minimum Temperature 6C.

Fri 14 Nov Wales

Widely wet and overcast, with persistent rain turning heavy in many areas, bringing a risk of flooding and challenging driving conditions. Windy too, with severe gale force winds in places. Maximum Temperature 13C.

Sat 15 Nov Wales

Turning more settled over the next few days with cloudy skies bringing a few showers at times, interspersed with bright or sunny spells. Light winds, but feeling colder for all.

Sun 16 Nov Wales

Turning more settled over the next few days with cloudy skies bringing a few showers at times, interspersed with bright or sunny spells. Light winds, but feeling colder for all.

Mon 17 Nov Wales

Turning more settled over the next few days with cloudy skies bringing a few showers at times, interspersed with bright or sunny spells. Light winds, but feeling colder for all.

Tue 18 Nov Wales

Colder conditions, already affecting the far north of the UK are likely to extend south to affect all pasts through the early part of the period. Initially we may see some less cold conditions with some cloud, rain and possibly hill snow affecting parts of the west. It is as this clears later Tuesday that the colder conditions will extend south, bringing some snow showers into northern parts, and the first frosts of the season for many parts of the south. Later in the period there is increasing uncertainty, but a trend towards more changeable conditions is possible, with some rain or showers in places, and perhaps some hill snow at times in the north. Temperatures overall likely to return to near-average.

Wed 19 Nov Wales

Colder conditions, already affecting the far north of the UK are likely to extend south to affect all pasts through the early part of the period. Initially we may see some less cold conditions with some cloud, rain and possibly hill snow affecting parts of the west. It is as this clears later Tuesday that the colder conditions will extend south, bringing some snow showers into northern parts, and the first frosts of the season for many parts of the south. Later in the period there is increasing uncertainty, but a trend towards more changeable conditions is possible, with some rain or showers in places, and perhaps some hill snow at times in the north. Temperatures overall likely to return to near-average.

Sully Island Weather Forecast

Today 13 Nov Wales

Tonight 13 Nov Wales

Fri 14 Nov Wales

Sat 15 Nov Wales

Sun 16 Nov Wales

Mon 17 Nov Wales

Tue 18 Nov Wales

Wed 19 Nov Wales

Temperature Forecast Met Office

Temperature Real-Time

Cobbacombe Cross (Devon) Radar

National Satellite

National Synoptic

Sully Island Temperature Statistics

November Temperature

St-athan (16km)

Lowest 9 January, 2025

Average 2025

Highest 12 August, 2025

Lowest 26 October, 2025

Average October

Highest 3 October, 2025

Lowest 2 November, 2025

Average November

Highest 5 November, 2025

Climate (2020–Present)

St-athan (16km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025