Beach
Colonia Beach
Bahía Ballena, Costa Rica · sea 29.8 °C at its warmest, in March

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.
About
beach in Costa Rica
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 Colonia Beach?
The sea off Colonia Beach averages 29.8 °C at its warmest, in March, and 27.8 °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 Colonia Beach?
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 Colonia Beach?
Colonia Beach is on the coast of Bahía Ballena, Costa Rica, at 9.1522, -83.7421. The map on this site flies straight to it.