Beach
Plage du lac d'Orient
Mesnil-Saint-Père, France

No sea temperature is shown for this beach: the nearest open water cell in NOAA's 0.25° grid is too far away to speak for this shore. That happens on river and lake beaches, and inside bays finer than the grid.
Wikipedia has no article about this beach yet. It is on the atlas from its Wikidata record and its photograph.
Questions
Where is Plage du lac d'Orient?
Plage du lac d'Orient is on the coast of Mesnil-Saint-Père, France, at 48.2607, 4.3433. The map on this site flies straight to it.