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Sea temperature in Spain in December
16°Cmild · monthly average
The sea around Spain averages 16°C in December. Cool — best for confident swimmers or short dips.
Monthly sea temperatures across the year
Best swim months
Jun, Jul, Aug, Sep
Warmest month
August (26°C)
Coolest month
February (14°C)
Best beaches in Spain
Costa Brava
Platja d'Aro
Long sandy promenade beach on the Costa Brava with shallow swim zone.
Costa Brava
Cala Sa Tuna
Tiny pebble cove in a fishing-village bay with crystal water.
Costa Brava
Cala Pola
Sheltered Costa Brava pine-rimmed cove.
Costa Brava
Platja Gran
Town beach beneath Tossa's medieval walls.
Costa Brava
Cala Montjoi
Wild horseshoe bay inside Cap de Creus park.
Costa Brava
Platja de Sant Pol
Calm family bay near Sant Feliu.
Costa Brava
Platja de Pals
Wide flat sandy beach backed by dunes.
Costa Brava
Cala Estreta
Hard-to-reach unspoilt cove on the Camí de Ronda.
Costa Brava
Aiguablava
Bright turquoise cove fronting a tiny fishing hamlet.