Swimming in the North of France in september 2025 Sea temperature by city in september
Do you want to go to the beach in the North of France in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in the North of France by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in the North of France in september 2025
Here, find the average sea temperature in the North of France in september in several coastal cities.
Pas-de-Calais in september
64°F
min: 63°F / max: 67°F
65°F
min: 63°F / max: 67°F
64°F
min: 62°F / max: 67°F
65°F
min: 63°F / max: 67°F
64°F
min: 62°F / max: 67°F
Berck
64°F
min: 63°F / max: 67°F
Nord in september
65°F
min: 63°F / max: 68°F
65°F
min: 63°F / max: 68°F
64°F
min: 62°F / max: 67°F
Grand-Fort-Philippe
65°F
min: 62°F / max: 67°F
Where should you go swimming in the North of France in the month of september?
Swimming in the North of France in september is cool
In september in the North of France swimming conditions are generally the same everywhere.
Swimming in september in Boulogne-sur-Mer, Calais, Dunkirk, Le Touquet, Bray-Dunes, Wissant, Audinghen, Berck, Escalles, Petit Fort Philippe, Ambleteuse, Equihen-Plage, Grand-Fort-Philippe, Sangatte and Wimereux is possible but the sea is generally cool. So though the sea temperature may sometimes reach 67°F, it can also go as low as 63°F. Note that the average is 64°F.
Where to go swimming in the North of France in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Boulogne-sur-Mer
| September | |||
| Average sea temperature | 64°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 67°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 2.6in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 38% | ||
| Our opinion | cool swimming |
More information on swimming in Boulogne-sur-Mer in september
Calais
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 67°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 2.9in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in Calais in september
Dunkirk
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 2.9in | ||
| Number of days of precipitation | 5 jour(s) (16%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in Dunkirk in september
Le Touquet
| September | |||
| Average sea temperature | 64°F | ||
| Minimum sea temperature | 62°F | ||
| Maximum sea temperature | 67°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 3.5in | ||
| Number of days of precipitation | 6 jour(s) (19%) | ||
| Cloud cover | 41% | ||
| Our opinion | cool swimming |
More information on swimming in Le Touquet in september
Bray-Dunes
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 2.7in | ||
| Number of days of precipitation | 4 jour(s) (14%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in Bray-Dunes in september
List of coastal cities in the North of France
| Boulogne-sur-Mer in september | cool swimming |
| Calais in september | cool swimming |
| Dunkirk in september | cool swimming |
| Le Touquet in september | cool swimming |
| Bray-Dunes in september | cool swimming |
| Wissant in september | cool swimming |
| Audinghen in september | cool swimming |
| Berck in september | cool swimming |
| Escalles in september | cool swimming |
| Petit Fort Philippe in september | cool swimming |
| Ambleteuse in september | cool swimming |
| Equihen-Plage in september | cool swimming |
| Grand-Fort-Philippe in september | cool swimming |
| Sangatte in september | cool swimming |
| Wimereux in september | cool swimming |