Beach
Praia do Portinho
Setúbal, Portugal · sea 18.9 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 15 km offshore, at the nearest open water cell of a 0.25° grid.
About
A praia do Portinho da Arrábida é uma pequena praia localizada junto à pequena aldeia do Portinho da Arrábida, no concelho de Setúbal, em Portugal.
Questions
How warm is the sea at Praia do Portinho?
The sea off Praia do Portinho averages 18.9 °C at its warmest, in August, and 14.7 °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 Portinho?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Praia do Portinho?
Praia do Portinho is on the coast of Setúbal, Portugal, at 38.4769, -8.9839. The map on this site flies straight to it.