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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Current UK weather desk. Data from national met services via Open-Meteo.
Before heading to Cornwall, check the live forecast above for today’s conditions and plan around the county’s famously changeable weather. The Atlantic influence means mild winters and moderate summers, but sea breezes and hills create local variations that matter for hikers, beachgoers and drivers alike.
When is the best time to visit Cornwall for decent weather?
Most visitors aim for May to September, when daytime highs commonly reach 18–22°C and daylight stretches beyond 15 hours. June and July are the sunniest months, though August welcomes the highest sea temperatures and school-holiday crowds. For lower prices and quieter coasts, late May or early September offer a good balance of warmth and value.
What should I pack for a Cornwall trip?
Layers are essential even in summer. A waterproof jacket, sunblock and sturdy walking shoes will see you through a day that might start misty, turn sunny and end with a sea breeze. In winter and spring, add a warm fleece and waterproof trousers — the South West Coast Path stays open but can be muddy and windy. Always check the Cornwall weather map for localised rain bands or coastal fog.
Does Cornwall have its own weather warning today?
Check the live forecast above. The Met Office issues yellow, amber or red warnings for wind, rain or snow affecting Cornwall. These are common in winter from Atlantic storms—always read the Cornwall weather warning today before travelling.
How accurate is a 21 day weather forecast Cornwall?
Long-range forecasts, like a 21 day weather forecast Cornwall, give a general trend but become unreliable beyond 7 days. The Met Office advises treating them as a guide for likely conditions, not a precise prediction. For trip planning, a 7-day outlook is far more dependable.
Where can I find reliable Newquay Cornwall weather?
Newquay’s coastal position means conditions can differ from inland. The live forecast above includes Newquay, and the Newquay Cornwall weather page on BBC Weather or the Met Office app gives hourly sea-state, UV index and wind direction — useful for surfing or beach days.
For other regions, see our UK weather hub or check the 10 day weather forecast UK for wider planning. If you’re comparing the south-west with the Isle of Wight, head to our Isle Of Wight Weather page. For northward breaks, our Lake District Weather and BBC Wales Weather guides offer similar travel-friendly advice.