Beach
Well's Bay
Saba, Netherlands · sea 29 °C at its warmest, in September

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
Well's Bay (also Wells Bay, The Well's Bay; previously The Well Bay) is a coastal bay on the island of Saba in the Dutch Caribbean. It is located on the northwestern coast of the island.
Questions
How warm is the sea at Well's Bay?
The sea off Well's Bay averages 29 °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 Well's Bay?
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 Well's Bay?
Well's Bay is on the coast of Saba, Netherlands, at 17.6411, -63.2528. The map on this site flies straight to it.