Beach
Plage de Trez Rouz
Camaret-sur-Mer, France · sea 15.7 °C at its warmest, in August

Sea temperature month by month
10.9Jan
10.2Feb
10.2Mar
11Apr
12.5May
14.1Jun
15.2Jul
15.7Aug
15.2Sep
14.5Oct
13.5Nov
12.2Dec
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
Wikipedia has no article about this beach yet. It is on the atlas from its Wikidata record and its photograph.
Questions
How warm is the sea at Plage de Trez Rouz?
The sea off Plage de Trez Rouz averages 15.7 °C at its warmest, in August, and 10.2 °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 Plage de Trez Rouz?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Plage de Trez Rouz?
Plage de Trez Rouz is on the coast of Camaret-sur-Mer, France, at 48.2880, -4.5672. The map on this site flies straight to it.