Black sand
Playa de la Garita
Gran Canaria, Spain · sea 23.4 °C at its warmest, in September

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 13 km offshore, at the nearest open water cell of a 0.25° grid.
About
La playa La Garita está situada en el municipio de Telde, al sureste en la isla Gran Canaria. Se trata de una de las cuatro playas de Telde que cuenta con bandera azul.
Questions
How warm is the sea at Playa de la Garita?
The sea off Playa de la Garita averages 23.4 °C at its warmest, in September, and 18.8 °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 de la Garita?
The sea reaches 20 °C or more from May to December. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Playa de la Garita?
Playa de la Garita is on the coast of Gran Canaria, Spain, at 28.0065, -15.3767. The map on this site flies straight to it.