Beach
Beach in Mönkebude
Mönkebude, Germany · sea 19.3 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 40 km offshore, at the nearest open water cell of a 0.25° grid.
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 in Mönkebude?
The sea off Beach in Mönkebude averages 19.3 °C at its warmest, in August, and 2 °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 in Mönkebude?
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 in Mönkebude?
Beach in Mönkebude is on the coast of Mönkebude, Germany, at 53.7722, 13.9725. The map on this site flies straight to it.