Beach
Neckarstrand an der Stadthalle Heidelberg
Heidelberg, Germany

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 Neckarstrand an der Stadthalle Heidelberg?
Neckarstrand an der Stadthalle Heidelberg is on the coast of Heidelberg, Germany, at 49.4125, 8.6991. The map on this site flies straight to it.