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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Civic Insight weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
For St Agnes, the live forecast above shows the immediate outlook for this north Cornish coastal parish. Expect conditions typical for this exposed stretch of Atlantic shoreline, with temperatures and wind speeds that shift rapidly with passing weather systems.
What is the weather like in St Agnes today?
The live forecast above gives the most up‑to‑the‑minute conditions. St Agnes sits on Cornwall’s north coast, facing the full force of westerly winds, so the feel of the air can change sharply within a few hours. Check the wind speed and precipitation chance before heading to the beach or the coastal path. For a broader picture of conditions across the region, see the UK weather hub.
Does the coastal location make a difference?
Yes, the village’s position between St Agnes Head and Trevaunance Cove means sea fog, salt spray and a moderating effect on winter cold and summer heat. Inland areas like Goonbell can be a couple of degrees warmer on still nights, while the coast stays cooler in summer and milder in winter. Nearby St Ives, often searched as bbc weather st ives, shares a similar coastal influence.
Is St Agnes windier than inland Cornwall?
Yes, the open exposure to the Atlantic means average wind speeds are 10–15 mph higher than sheltered inland valleys. Gusts over 40 mph are common in winter, and the coast path can be hazardous in strong south‑westerlies.
When is the best time to visit St Agnes for weather?
Late May to early September offers the highest chance of settled conditions, with sea temperatures peaking around 16 °C in August. Spring and autumn can bring calm, bright spells, but Atlantic fronts arrive quickly.
How does St Agnes weather compare with Truro?
Truro, sheltered inland on the Truro River, is often 2–3 °C warmer on clear days and sees less wind. St Agnes is cooler and fresher, with a more immediate maritime influence.