canIswim

What wetsuit do you need in United Kingdom?

The one suit that covers most of the swimming season, for 28 coastal cities in United Kingdom.

City Coldest Warmest One suit for the season
Edinburgh 6.5°C Feb 14.7°C Aug 5/4 mm full suit
Liverpool 6.7°C Feb 17.9°C Aug 5/4 mm full suit
Bristol 7.1°C Jan 19.4°C Aug nothing, or a rash vest
Cardiff 7.4°C Jan 19.2°C Aug nothing, or a rash vest
Swansea 8.0°C Feb 18.5°C Aug 4/3 mm full suit
Brighton 9.1°C Mar 18.0°C Aug shorty, or skins if you are used to it
Plymouth 9.9°C Feb 17.3°C Aug 4/3 mm full suit
Portsmouth 8.4°C Feb 18.8°C Aug shorty, or skins if you are used to it
Aberdeen 6.8°C Mar 13.8°C Aug 5/4 mm full suit
Sunderland 6.9°C Feb 14.6°C Aug 5/4 mm full suit
Bournemouth 8.8°C Feb 18.3°C Aug shorty, or skins if you are used to it
Dundee 6.6°C Feb 14.4°C Aug 5/4 mm full suit
Blackpool 6.5°C Feb 17.8°C Aug 5/4 mm full suit
Middlesbrough 6.9°C Feb 15.0°C Aug 5/4 mm full suit
Exeter 9.5°C Mar 17.5°C Aug 4/3 mm full suit
Hastings 8.8°C Feb 18.1°C Aug 5/4 mm full suit
Dunfermline 6.5°C Feb 14.7°C Aug 5/4 mm full suit
Lancaster 6.4°C Feb 18.0°C Aug 5/4 mm full suit
Dover 8.5°C Feb 18.5°C Aug 5/4 mm full suit
Chichester 8.6°C Feb 18.6°C Aug shorty, or skins if you are used to it
Peterlee 6.9°C Feb 14.5°C Aug 5/4 mm full suit
Bangor 8.0°C Feb 16.3°C Aug 5/4 mm full suit
Porthcawl 8.1°C Feb 18.6°C Aug 5/4 mm full suit
Abergele 7.4°C Feb 17.1°C Aug 5/4 mm full suit
Kirkwall 7.5°C Feb 13.3°C Aug 5/4 mm full suit
Lerwick 7.5°C Mar 13.1°C Aug 5/4 mm full suit
Neyland 8.9°C Feb 17.2°C Aug 5/4 mm full suit
Barmouth 7.9°C Feb 18.0°C Aug 5/4 mm full suit

Thicknesses above are for swimming. Surfing the same water wants a step more — most of a session is spent sitting still in the wind rather than moving and immersed. Each city page gives both, along with when you need boots, gloves and a hood.

Boots below 14°C, gloves below 12°C, a hood below 10°C. Where the numbers come from