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

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
beach in Puerto Rico
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 Luis Peña Beach?
The sea off Luis Peña Beach 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 Luis Peña 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 Luis Peña Beach?
Luis Peña Beach is on the coast of Puerto Rico, United States, at 18.3111, -65.3331. The map on this site flies straight to it.