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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the WordPatch weather desk. Data from national met services via Open-Meteo.
The live forecast above shows St Mawes enjoying a mild South West climate, with the most settled weather from late spring through early autumn, making June to September the best months for a visit.
What is the best time to visit St Mawes?
St Mawes benefits from Cornwall’s sheltered Roseland Peninsula, so it often feels warmer than exposed coastal spots. For reliable sunshine and calm seas, aim for July and August, though May and June offer longer daylight and fewer crowds. The water warms enough for swimming by June, and the local webcam often shows a bustling harbour in summer. If you prefer quieter walks, September remains pleasant but with shorter days.
What should I pack for St Mawes?
Even in summer, a light waterproof is wise – Cornish weather can change quickly, and the Met Office forecast for St Mawes frequently shows passing showers. For winter visits (November–February), pack layers, a warm coat and sturdy shoes; temperatures hover around 8–12°C. In any season, sun cream and a hat are useful: the UV index can be moderate even on cloudy days. Check the BBC Weather St Mawes page before you go for the latest wind speeds if you plan to take a boat trip.
When are school holidays in St Mawes?
Cornwall follows the standard UK school term dates. Summer holidays typically run from late July to early September, Easter break is two weeks in April, and half-terms fall in February, May and October. Check the council website for exact dates.
Does St Mawes get much rain?
Yes, Cornwall receives above-average rainfall, but St Mawes is slightly drier than the north coast. The wettest months are November to January. For a 14-day outlook, many visitors use the Met Office for St Mawes weather 14 days ahead to plan around showers.
Can I see a live webcam of St Mawes?
Yes, several local webcams show the harbour and beach conditions in real time. Searching “St Mawes webcam” will bring up options, including the popular view from the St Mawes Hotel. Always confirm the feed is current before relying on it for conditions.
For further details, see the UK weather hub or the Bristol Weather page for a nearby city comparison. If you’re planning ahead, our 10 Day Weather Forecast UK page includes extended outlooks for St Mawes and other coastal spots.