Beach
Rena Majori
Aglientu, Italy · sea 24.9 °C at its warmest, in August

Sea temperature month by month
13.9Jan
13.3Feb
13.6Mar
14.7Apr
17.2May
20.7Jun
23.7Jul
24.9Aug
23.2Sep
20.6Oct
18Nov
15.3Dec
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 Rena Majori?
The sea off Rena Majori averages 24.9 °C at its warmest, in August, and 13.3 °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 Rena Majori?
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 Rena Majori?
Rena Majori is on the coast of Aglientu, Italy, at 41.1752, 9.1715. The map on this site flies straight to it.