Golden sand
Bakio
Bakio, Spain · sea 21.8 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 22 km offshore, at the nearest open water cell of a 0.25° grid.
About
La playa Baquio situada en el municipio vizcaíno de Baquio, País Vasco (España), es una playa con arena.
Questions
How warm is the sea at Bakio?
The sea off Bakio averages 21.8 °C at its warmest, in August, and 12.5 °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 Bakio?
The sea reaches 20 °C or more from July to September. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Bakio?
Bakio is on the coast of Bakio, Spain, at 43.4300, -2.8069. The map on this site flies straight to it.