Beach
Praia do Caripi
Barcarena, Brazil · sea 29.4 °C at its warmest, in June

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 16 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 Praia do Caripi?
The sea off Praia do Caripi averages 29.4 °C at its warmest, in June, and 28.3 °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 Praia do Caripi?
The sea reaches 20 °C or more from All year. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Praia do Caripi?
Praia do Caripi is on the coast of Barcarena, Brazil, at -1.4918, -48.7065. The map on this site flies straight to it.