Beach
Playa Tamarindo
Puerto Rico, United States · sea 28.9 °C at its warmest, in September

Sea temperature month by month
26.5Jan
26.2Feb
26.2Mar
26.7Apr
27.4May
28Jun
28.2Jul
28.6Aug
28.9Sep
28.9Oct
28.3Nov
27.3Dec
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 Playa Tamarindo?
The sea off Playa Tamarindo averages 28.9 °C at its warmest, in September, and 26.2 °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 Playa Tamarindo?
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 Playa Tamarindo?
Playa Tamarindo is on the coast of Puerto Rico, United States, at 18.3179, -65.3176. The map on this site flies straight to it.