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France Sea Temperature by Month

12-month annual sea surface temperature curves across all 35 surveyed coastlines in France. Data queried directly from NOAA OISST v2.1 1991–2020 0.25° grid climatology.

Notice: 30-year historical climatological monthly mean (1991–2020), not a live single-day sensor forecast.

Côte d’Azur & Corsica vs English Channel & Brittany

France’s Mediterranean coast (French Riviera and Corsica) enjoys sheltered 24.5–25.5°C August waters protected by the Maritime Alps. Conversely, Brittany and Normandy face 8–12 meter tidal ranges and strong currents that continuously mix the water column, limiting summer temperatures to 16.5–18.0°C.

Oceanographic Phenomenon: Ligurian Current vs Macrotidal Channel Currents
Thermal Lag Characteristic: Corsican and Riviera thermal lag: sheltered gulfs retain comfortable swimming conditions (21.5°C) well into October.
Peak Bathing Average: August (24.8°C)

Coastlines & Monthly Curves in France

Plage de Notre-Dame

Ile de Porquerolles, Hyeres · Golden Sand

Peak August: 23.5°C (Jun: 20°C · Sep: 21.8°C)

Plage de Rondinara

Bonifacio, Corsica · Fine White Sand

Peak August: 25.1°C (Jun: 20.9°C · Sep: 23.1°C)

Calanque d'En-Vau

Cassis · Pebbles / Shingle

Peak August: 23.0°C (Jun: 19.6°C · Sep: 21.3°C)

Plage de Roccapina

Corsica · Golden Sand

Peak August: 24.8°C (Jun: 20.7°C · Sep: 23.1°C)

Plage d'Argent

Porquerolles, Provence · Fine White Sand

Peak August: 23.5°C (Jun: 20°C · Sep: 21.8°C)

Étretat Beach

Normandy · Pebbles / Shingle

Peak August: 18.5°C (Jun: 14.7°C · Sep: 17.8°C)

Plage de Saleccia

Agriates, Corsica · Fine White Sand

Peak August: 24.6°C (Jun: 20.9°C · Sep: 22.7°C)

Calanque de Sormiou

Marseille · Pebbles / Shingle

Peak August: 22.6°C (Jun: 19.4°C · Sep: 20.9°C)

Dune du Pilat

Pyla-sur-Mer, Arcachon · Golden Sand

Peak August: 21.5°C (Jun: 18.4°C · Sep: 20.2°C)

Grande Plage

Biarritz · Golden Sand

Peak August: 22.1°C (Jun: 18.9°C · Sep: 20.7°C)

Hendaye Plage

Basque Coast · Golden Sand

Peak August: 22.2°C (Jun: 18.9°C · Sep: 20.8°C)

La Graviere

Soorts-Hossegor, Landes · Golden Sand

Peak August: 22.1°C (Jun: 18.9°C · Sep: 20.7°C)

Plage de la Torche

Brittany · Golden Sand

Peak August: 17.6°C (Jun: 15.7°C · Sep: 16.8°C)

Plage de Nonza

Nonza, Cap Corse, Corsica · Volcanic Black Sand

Peak August: 24.9°C (Jun: 21.1°C · Sep: 22.9°C)

Plage de Saint-Nicolas

Îles Glénan, Finistère · Golden Sand

Peak August: 18.2°C (Jun: 16°C · Sep: 17.3°C)

Plage de Biscarrosse

Biscarrosse-Plage, Landes · Golden Sand

Peak August: 21.6°C (Jun: 18.5°C · Sep: 20.3°C)

Plage de l'Almanarre

Presqu'île de Giens, Hyères · Golden Sand

Peak August: 23.5°C (Jun: 20°C · Sep: 21.8°C)

Plage de Lacanau

Lacanau-Océan, Gironde · Golden Sand

Peak August: 21.2°C (Jun: 18.3°C · Sep: 19.8°C)

Plage de Trestraou

Côte de Granit Rose, Brittany · Golden Sand

Peak August: 16.9°C (Jun: 13.8°C · Sep: 16.9°C)

Plage d'Argelès-sur-Mer

Argelès-sur-Mer, Roussillon · Golden Sand

Peak August: 22.0°C (Jun: 19°C · Sep: 20.3°C)

Plage du Cap Ferret

Arcachon Bay · Golden Sand

Peak August: 21.5°C (Jun: 18.4°C · Sep: 20.2°C)

Deauville Beach

Normandy · Golden Sand

Peak August: 19.0°C (Jun: 15.2°C · Sep: 18°C)

Omaha Beach

Normandy · Golden Sand

Peak August: 18.1°C (Jun: 14.4°C · Sep: 17.8°C)

Paloma Beach

Saint-Jean-Cap-Ferrat · Pebbles / Shingle

Peak August: 24.6°C (Jun: 21.1°C · Sep: 22.4°C)

Nice Beach

Promenade des Anglais, Nice · Pebbles / Shingle

Peak August: 24.6°C (Jun: 21.1°C · Sep: 22.4°C)

Plage de Calvi

Calvi, Haute-Corse · Golden Sand

Peak August: 24.5°C (Jun: 20.8°C · Sep: 22.7°C)

Plage du Sillon

Saint-Malo, Brittany · Golden Sand

Peak August: 18.1°C (Jun: 14.7°C · Sep: 17.7°C)

Plage de Pampelonne

Saint-Tropez · Golden Sand

Peak August: 24.0°C (Jun: 20.6°C · Sep: 21.9°C)