Beach
Plage Saint-François
Corsica, France · sea 24.7 °C at its warmest, in August

Sea temperature month by month
13.9Jan
13.3Feb
13.7Mar
14.9Apr
17.6May
21Jun
23.7Jul
24.7Aug
23Sep
20.7Oct
18.1Nov
15.4Dec
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 Saint-François?
The sea off Plage Saint-François averages 24.7 °C at its warmest, in August, and 13.3 °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 Saint-François?
The sea reaches 20 °C or more from June to October. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Plage Saint-François?
Plage Saint-François is on the coast of Corsica, France, at 41.9167, 8.7331. The map on this site flies straight to it.