Beach
Plage de Longchamp
Saint-Briac-sur-Mer, France · sea 18.1 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
beach in Saint-Lunaire and Saint-Briac-sur-Mer
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 Longchamp?
The sea off Plage de Longchamp averages 18.1 °C at its warmest, in August, and 8.5 °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 Longchamp?
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 Longchamp?
Plage de Longchamp is on the coast of Saint-Briac-sur-Mer, France, at 48.6362, -2.1215. The map on this site flies straight to it.
Beaches nearby
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Plage de la FourberieSaint-Lunaire, France
Plage du Port-BlancSaint-Lunaire, France
Plage de Saint-ÉnogatDinard, France
Plage de Port-RiouDinard, France
Plage de la MalouineDinard, France
Plage de l'ÉcluseDinard, France