Beach
Tunnels Beaches
Ilfracombe, United Kingdom · sea 17.3 °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
The Tunnels Beaches are a set of coves in Ilfracombe, Devon, reachable from land only through tunnels cut through the rock. They are a local tourist attraction.
Questions
How warm is the sea at Tunnels Beaches?
The sea off Tunnels Beaches averages 17.3 °C at its warmest, in August, and 7.9 °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 Tunnels Beaches?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Tunnels Beaches?
Tunnels Beaches is on the coast of Ilfracombe, United Kingdom, at 51.2110, -4.1259. The map on this site flies straight to it.