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Coldest sea in France

477 coastal locations in France ranked by year-round average sea temperature, coldest first. The regional average is 15.3°C. The top of the list is where the water stays cold all year. The contrast list at the bottom shows the warmest coasts for context.

Coldest location

Sainte-Marie-sur-Mer

Year-round average 6.8°C in France

Regional average

15.3°C

across all 477 France coastal locations

Coldest month

February

10.9°C region-wide average

France monthly average 10.9°C to 20.3°C
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  • Warmest month August 20.3°C
  • Coldest month February 10.9°C
  • Annual mean 15.3°C
  • Months above 20°C 1 of 12

Month by month across France

Sea temperatures in France swing from 10.9°C in February to 20.3°C in August on average across every coast we track. That spread of 9°C hides much bigger swings at individual locations.

Want a specific month? Pick one for a dedicated ranking:

France sea temperature map

Today's pin colours show the latest daily reading at every France location we track. Cool blues cluster around the high-latitude coasts.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest locations in France

Coastal locations across France sorted by year-round average, coldest first. Honest cold-water swimming country. Click any place for its 30-day chart, monthly profile, and 10-year history.

# Location Annual mean
1 Sainte-Marie-sur-Mer 6.8°C
2 Rhine (near Strasbourg) 12.6°C
3 Bray Dunes 13.0°C
4 Dunkirk 13.1°C
5 Malo-les-Bains 13.1°C
6 Pas de Calais 13.1°C
7 Ambleteuse 13.1°C
8 Audresselles 13.1°C
9 Wimereux 13.1°C
10 Wissant 13.1°C
11 Brest Brittany 13.1°C
12 Daoulas Brittany 13.1°C
13 Lanveoc Brittany 13.1°C
14 Le Faou Brittany 13.1°C
15 Le Relecq Kerhuon Brittany 13.1°C
16 Logonna Daoulas Brittany 13.1°C
17 Plougastel-Daoulas Brittany 13.1°C
18 Calais 13.2°C
19 Camaret Sur Mer Brittany 13.2°C
20 Plougonvelin Brittany 13.2°C
21 Roscanvel Brittany 13.2°C
22 Sangatte 13.2°C
23 Boulogne-sur-Mer 13.2°C
24 Le Portel 13.2°C
25 Le Touquet Paris Plage 13.2°C
Show 25 more ▸
26 Dunkerque Hauts-de-France 13.2°C
27 Berck 13.2°C
28 Fort-Mahon-Plage 13.2°C
29 Landeda Brittany 13.2°C
30 Ploudalmezeau Brittany 13.2°C
31 Plouguerneau Brittany 13.2°C
32 Portsall 13.2°C
33 Saint Pabu Brittany 13.2°C
34 Brignogan-Plage Brittany 13.2°C
35 Guisseny Brittany 13.2°C
36 Kerlouan Brittany 13.2°C
37 Le Conquet Brittany 13.2°C
38 Plouneour Trez Brittany 13.2°C
39 Gravelines Hauts-de-France 13.3°C
40 Audierne Brittany 13.3°C
41 Morgat Brittany 13.3°C
42 Porspoder Brittany 13.3°C
43 Santec Brittany 13.3°C
44 Sibiril Brittany 13.3°C
45 L'Aber Benoit Finistère 13.3°C
46 Ault 13.3°C
47 Berck Plage - Fort Mahon Hauts-de-France 13.3°C
48 Cayeux Sur Mer 13.3°C
49 Le Touquet (Etaples) Hauts-de-France 13.3°C
50 Le Treport 13.3°C

Warmest 10 in France for contrast

Same data flipped. Useful if you want to know which France coasts stay warmest year-round before you commit to a cold-water swim trip.

# Location Annual mean
1 lies Wallis (Mata-Utu) Hahake 29.2°C
2 Clipperton-D Overseas France 28.4°C
3 Ajaccio Aspretto Corse 19.5°C
4 Ajaccio Corse 19.5°C
5 Solenzara Corsica 19.5°C
6 Centuri Corse 19.4°C
7 Evian-les-Bains 19.3°C
8 l'Île-Rousse Corse 19.2°C
9 Aix-les-Bains 19.1°C
10 Lac d'Aiguebelette 19.1°C

More on this region