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Live forecasts update automatically; written guidance last reviewed 15 June 2026 by the National Report weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
On St Mary’s Island – the largest of the Isles of Scilly – the live forecast above shows bright, breezy conditions typical of a spring day. The sea breeze keeps temperatures fresh, so a light jacket is worth having for any coastal walks today.
What is the weather like on St Mary’s Island today?
As the live forecast above indicates, St Mary’s is seeing a mix of sunshine and cloud, with a moderate south-westerly breeze. The settled high pressure over the south-west is keeping most rain at bay, though a few short showers cannot be ruled out later. Given the island’s exposed position, wind speeds often feel stronger than the official figure suggests – particularly around the quay and Hugh Town.
What should visitors know about the climate on St Mary’s?
The Isles of Scilly enjoy a milder, more stable climate than much of mainland Britain, thanks to the Gulf Stream. Winters are damp but rarely frosty; summers are cool and often breezy. The live forecast above reflects that typical pattern: changeable but not extreme. If you’re planning outdoor activities, always check the met office weather isles of scilly updates before heading out.
Does it rain a lot on St Mary’s Island?
Rainfall on St Mary’s is spread fairly evenly across the year, though the island tends to be drier than mainland Cornwall. Showers can pass quickly – many visitors find a light waterproof useful even on a sunny day.
When is the best time to visit St Mary’s for good weather?
Late spring (May to June) and early autumn (September) often bring the most settled conditions, with lighter winds and lower rain chances. July and August can be busier but still mild, with sea fog occasionally rolling in.
Why is the wind so strong on St Mary’s?
The island’s exposed position in the Atlantic means it catches the full force of south-westerly winds. The live forecast above shows this pattern – always check bbc weather st mary’s scilly for the latest wind speeds if you’re taking the ferry or walking coastal paths.
Sources
For a broader picture of conditions across the UK, visit our UK weather hub or 10 day weather forecast. If you’re comparing with mainland towns, Bristol Weather and Liverpool Weather are also available.