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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the UK Bullet weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above for Burnham-on-Sea today – coastal conditions shift rapidly along the Bristol Channel, so expect cooler breezes and possible sea fog even when inland areas are clear.
What is the typical weather pattern for Burnham-on-Sea?
Burnham-on-Sea experiences a mild maritime climate with relatively small temperature swings. The Bristol Channel moderates extremes, but the exposed position means wind and rain can arrive quickly from the Atlantic.
- Average summer highs: 18–21 °C, often cooler near the shore due to sea breezes.
- Winter lows rarely fall below 1–2 °C by night, with occasional frost.
- Rainfall is spread fairly evenly across the year, though autumn and winter tend to be wettest.
- Sea fog (haar) can drift inland, especially in spring and early summer, reducing visibility to under 200 metres.
How do tides affect Burnham-on-Sea weather?
The Bristol Channel has the second-highest tidal range in the world, so the beach can vanish or expand by over a kilometre in hours. The live forecast above won’t show tide times, but always check local tide tables before walking on the sands.
- Low tide exposes extensive mudflats – never walk on them if the tide is rising.
- High tide combined with strong onshore winds can cause coastal flooding along the Esplanade.
- The wind often picks up in the afternoon as sea breezes develop, making conditions feel cooler than the temperature suggests.
Does Burnham-on-Sea get fog often?
Yes, especially in spring and early summer when warm air passes over the cool Bristol Channel. This sea fog can linger for hours, but usually clears by late morning as the land warms.
Can I swim in the sea at Burnham?
Swimming is possible but not recommended along the main beach due to strong currents and fast-rising tides. Safer options include the indoor lido or patrolled zones at nearby Brean. Always check local safety signs.
What is the best time to visit Burnham-on-Sea for weather?
Late May to early September offers the warmest and driest conditions, with average highs of 18–20 °C. July and August are busiest; May and June tend to be quieter with still pleasant temperatures.
Sources
For a broader view, see our UK weather hub or check nearby Bristol Weather. If you are planning ahead, our 10 Day Weather Forecast UK page includes Burnham-on-Sea and the wider region. For even longer planning, a bbc weather burnham-on-sea 14 days outlook is available on the live forecast above.