United Kingdom Coastal Region

Portsmouth Sea Water Temperature

Compare sea surface temperatures across 2 top coastal destinations in Portsmouth. Check below for live marine observations, wave conditions, and monthly averages.

Beaches & Swimming Spots in Portsmouth— page 1 of 1

Irish Sea

Eastney Beach

A temperate beach on the Irish Sea, warmest around August at about 17.9°C.

Historical Sep Avg:17.6°C(63.7°F)

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Irish Sea

Southsea nudist beach

A temperate beach on the Irish Sea, warmest around August at about 17.9°C.

Historical Sep Avg:17.6°C(63.7°F)

View SST →