Golden sand
Karraspio
Mendexa, Spain · sea 22.1 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
La playa Karraspio, derivado de Garraiz azpia, Garraizpia, situada en el municipio vizcaíno de Mendexa, País Vasco (España), es una playa con arena oscura.
Questions
How warm is the sea at Karraspio?
The sea off Karraspio averages 22.1 °C at its warmest, in August, and 12.4 °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 Karraspio?
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 Karraspio?
Karraspio is on the coast of Mendexa, Spain, at 43.3628, -2.4942. The map on this site flies straight to it.