Beach
Beach of Criel-sur-Mer
Criel-sur-Mer, France · sea 18.5 °C at its warmest, in August

Sea temperature month by month
8.2Jan
7.4Feb
7.7Mar
9.5Apr
11.9May
14.6Jun
17Jul
18.5Aug
17.8Sep
15.6Oct
12.9Nov
10.2Dec
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 Beach of Criel-sur-Mer?
The sea off Beach of Criel-sur-Mer averages 18.5 °C at its warmest, in August, and 7.4 °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 Beach of Criel-sur-Mer?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Beach of Criel-sur-Mer?
Beach of Criel-sur-Mer is on the coast of Criel-sur-Mer, France, at 50.0335, 1.3120. The map on this site flies straight to it.