Beach
Sardinero
Santander, Spain · sea 21.5 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 18 km offshore, at the nearest open water cell of a 0.25° grid.
About
Sardinero is a popular beach located in the Spanish city of Santander, Cantabria. The beach is divided in two by the gardens of Piquio about one-quarter the way along its length, stretching…
Questions
How warm is the sea at Sardinero?
The sea off Sardinero averages 21.5 °C at its warmest, in August, and 12.6 °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 Sardinero?
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 Sardinero?
Sardinero is on the coast of Santander, Spain, at 43.4742, -3.7875. The map on this site flies straight to it.