Beach
Weymouth Beach
Weymouth, United Kingdom · sea 17.1 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
Weymouth Beach is a gently curving arc of sand in Weymouth Bay, beside the town of Weymouth in Dorset, England. Immediately adjacent to the beach is The Esplanade.
Questions
How warm is the sea at Weymouth Beach?
The sea off Weymouth Beach averages 17.1 °C at its warmest, in August, and 8.4 °C at its coolest. These are monthly means from NOAA's OISST v2.1 satellite and buoy record for 1991 to 2020, sampled at the beach's own coordinates.
When can you swim at Weymouth Beach?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Weymouth Beach?
Weymouth Beach is on the coast of Weymouth, United Kingdom, at 50.6113, -2.4525. The map on this site flies straight to it.