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Open-water swimming weather in Brighton

If you're planning anything outdoors in Brighton, the city's south coast position gives it some of the best weather in the UK — more sunshine hours than most of the country, mild winters thanks to the English Channel, and reliable summer warmth. The trade-off is wind: Brighton is genuinely exposed to whatever the Channel sends, and the seafront can be properly windy when inland Sussex stays calm.

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If you're swimming open-water around Brighton (Hove Lagoon, the sea itself, Saltdean tidal pool), the English Channel is consistently warmer than the Irish or North Seas — but tides, currents and seafront conditions need careful planning, and water temperature lags air temperature by several weeks in spring.

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Last updated: 7 May 2026