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Sea temperature in United Kingdom in December
10°Ccool · monthly average
The sea around United Kingdom averages 10°C in December. Cool — best for confident swimmers or short dips.
Monthly sea temperatures across the year
Best swim months
—
Warmest month
August (17°C)
Coolest month
February (8°C)
Best beaches in United Kingdom
Cornwall
Fistral Beach
Cornwall's signature surf beach.
Cornwall
Watergate Bay
Two-mile wide-sand surf beach.
Cornwall
Porthcurno
Turquoise-water cove beside the Minack Theatre.
Cornwall
Sennen Cove
Wide sandy bay near Land's End.
Cornwall
Kynance Cove
Serpentine cliffs and clear water.
Cornwall
Polzeath
Family-favourite north-Cornwall surf beach.
Cornwall
Perranporth
Three-mile dune-backed surf beach.
Cornwall
Porthmeor
Town surf beach in front of Tate St Ives.
Cornwall
Porthminster
Sheltered turquoise St Ives bay.