Beach
Plage de Foncillon
Royan, France · sea 20.7 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
La plage de Foncillon est une plage de sable située sur la commune de Royan en Charente-Maritime sur la rive droite de l'estuaire de la Gironde, à proximité immédiate de l'océan Atlantique.
Questions
How warm is the sea at Plage de Foncillon?
The sea off Plage de Foncillon averages 20.7 °C at its warmest, in August, and 9.9 °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 Foncillon?
The sea reaches 20 °C or more from July to August. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Plage de Foncillon?
Plage de Foncillon is on the coast of Royan, France, at 45.6192, -1.0337. The map on this site flies straight to it.