St Agnes (Isles of Scilly) Weather Forecast, Cornwall TR22 0

Today 14 Aug South West England

Variable amounts of cloud to start Thursday; this clearing to provide lengthier sunny spells in the afternoon. Dry for most, but isolated light showers in the north initially. A warm day, particularly in sunnier moments. Maximum Temperature 25C.

Tonight 14 Aug South West England

Late sunny spells to end the day. Staying dry overnight but patchy low cloud and fog developing in places. Mild in general, though slightly fresher than last night. Minimum Temperature 12C.

Fri 15 Aug South West England

Any low cloud and patchy fog soon clearing, leaving a fine and dry day with lengthy periods of strong sunshine. Feeling hot with only a light breeze. Maximum Temperature 29C.

Sat 16 Aug South West England

A largely settled period with lengthy sunny spells after early morning cloud clears. Warm in the sunshine, though also turning windier. Showers possible in the west on Sunday and Monday.

Sun 17 Aug South West England

A largely settled period with lengthy sunny spells after early morning cloud clears. Warm in the sunshine, though also turning windier. Showers possible in the west on Sunday and Monday.

Mon 18 Aug South West England

A largely settled period with lengthy sunny spells after early morning cloud clears. Warm in the sunshine, though also turning windier. Showers possible in the west on Sunday and Monday.

Tue 19 Aug South West England

High pressure will be dominant across much of the UK at the start of this period. This will bring a good deal of fine and dry weather with spells of sunshine for many. Any showers will probably be confined to the southwest of the UK but could be heavy and thundery. Temperatures are likely to be well above normal, especially in the south. Later, it will likely become more changeable with some showers or longer spells of rain at times. Rainfall is expected to be highest in the south where some heavy, thundery showers are possible, with drier conditions further north. Some periods of dry and settled weather are also likely to develop at times. Temperatures are expected to be above normal.

Wed 20 Aug South West England

High pressure will be dominant across much of the UK at the start of this period. This will bring a good deal of fine and dry weather with spells of sunshine for many. Any showers will probably be confined to the southwest of the UK but could be heavy and thundery. Temperatures are likely to be well above normal, especially in the south. Later, it will likely become more changeable with some showers or longer spells of rain at times. Rainfall is expected to be highest in the south where some heavy, thundery showers are possible, with drier conditions further north. Some periods of dry and settled weather are also likely to develop at times. Temperatures are expected to be above normal.

St Agnes (Isles of Scilly) Weather Forecast

Today 14 Aug South West England

Tonight 14 Aug South West England

Fri 15 Aug South West England

Sat 16 Aug South West England

Sun 17 Aug South West England

Mon 18 Aug South West England

Tue 19 Aug South West England

Wed 20 Aug South West England

Temperature Forecast Met Office

Temperature Real-Time

Predannack (Cornwall) Radar

National Satellite

National Synoptic

St Agnes (Isles of Scilly) Temperature Statistics

August Temperature

Scilly St Marys (3km)

Lowest 8 February, 2025

Average 2025

Highest 11 July, 2025

Lowest 4 July, 2025

Average July

Highest 11 July, 2025

Lowest 2 August, 2025

Average August

Highest 9 August, 2025

Climate (2020–Present)

Scilly St Marys (3km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025