Beach
Playa del Sable (Arnuero)
Spain · sea 21.6 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 16 km offshore, at the nearest open water cell of a 0.25° grid.
About
La playa de El Sable o playa de Quejo está ubicada en el municipio de Arnuero (Cantabria, España). Está galardonada con Bandera Azul.
Questions
How warm is the sea at Playa del Sable (Arnuero)?
The sea off Playa del Sable (Arnuero) averages 21.6 °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 Playa del Sable (Arnuero)?
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 Playa del Sable (Arnuero)?
Playa del Sable (Arnuero) is on the coast of Spain, at 43.4983, -3.5422. The map on this site flies straight to it.