Beach
Tis Grias to Pidima
Andros Municipality, Greece · sea 24.3 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 13 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 Tis Grias to Pidima?
The sea off Tis Grias to Pidima averages 24.3 °C at its warmest, in August, and 15 °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 Tis Grias to Pidima?
The sea reaches 20 °C or more from June to October. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Tis Grias to Pidima?
Tis Grias to Pidima is on the coast of Andros Municipality, Greece, at 37.7828, 24.9580. The map on this site flies straight to it.