South Wales sits on the Celtic Sea and Bristol Channel, where tidal range and swell shape every dive. The sites in our database are all shore entries on reef and cave terrain, reaching shallow depths suited to beginners and intermediates. Visibility can reach up to twenty metres but is frequently reduced by tidal movement. Water temperatures climb from around eight or nine degrees Celsius in winter to a peak of eighteen or nineteen degrees in late summer, so a wetsuit is needed year-round. Divers encounter seals, dogfish, velvet swimming crabs, squat lobsters, gorgonians, and whip coral across sites from Bracelet Bay to Worm's Head.
Monthly water temperature across South Wales's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperatures peak in late summer and drop to around eight or nine degrees Celsius through winter and early spring, making a well-fitted wetsuit or drysuit necessary on most dives. Tidal movement is the main variable: swell and current can reduce visibility sharply, so timing entries around slack water matters at most sites.
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Water temperature around South Wales ranges from about 8°C in February to 18°C in August, based on satellite sea-temperature data for its dive sites.
In the warm season (about 18°C) a 5mm suit is comfortable in South Wales; in the coldest months (about 8°C) step up to a drysuit.
Fin maps 5 sites in South Wales (2 scuba diving sites and 4 snorkelling spots, with some suited to both).
5 more sites to explore
