Swimming in Belle-Île-en-Mer in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Belle-Île-en-Mer in september 2025.
In september, according to seasonal norms, the sea temperature in Belle-Île-en-Mer is:
Minimum: 63°F
Average: 65°F
Maximum: 68°F
Other useful seasonal weather averages in september:
- Outside temperature: 62°F to 66°F
- Most common weather: "Clear/Sunny"
- The wind blows at 10.6mph
- It rains a total of 2in, over 3 day(s).
Should we swim in Belle-Île-en-Mer in september?
Yes... and no. The water temperature in Belle-Île-en-Mer in september is cool
Swimming in september on the beaches of Belle-Île-en-Mer is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 68°F, it can also be as low as 63°F! Note that the average is 65°F.
Note also that in september, the climate is good with an average outside temperature of 64°F, 2in of precipitation (over 3 days) and 81.87 % humidity.
Water and normal seasonal temperatures in Belle-Île-en-Mer in september
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 65°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 63°F | ||
| Wind speed | 15.5mph | ||
| Wind temperature | 63°F | ||
| Precipitation | 2in | ||
| Number of days of rain | 3 jour(s) (10%) | ||
| Humidity | 82% | ||
| Visibility in kilometers | 9.75km | ||
| Cloud cover | 30% | ||
| Our opinion | cool swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Belle-Île-en-Mer
Swim elsewhere in Brittany in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Brest in september | 62°F | 65°F | cold swimming | Lorient in september | 65°F | 67°F | cool swimming | Saint-Brieuc (Côtes d'Armor) in september | 65°F | 67°F | cool swimming | Saint-Malo in september | 65°F | 67°F | cool swimming | Vannes in september | 65°F | 68°F | cool swimming | Concarneau in september | 63°F | 66°F | cool swimming | Dinard in september | 65°F | 67°F | cool swimming | Erquy in september | 65°F | 67°F | cool swimming | Perros-Guirec in september | 63°F | 66°F | cool swimming | The Quiberon peninsula in september | 65°F | 68°F | cool swimming | Bénodet in september | 63°F | 66°F | cool swimming | Brehat Island (Île de Bréhat) in september | 64°F | 65°F | cool swimming | Cap Fréhel in september | 65°F | 67°F | cool swimming | Carnac in september | 64°F | 67°F | cool swimming | côte de granit rose (Pink Granite Coast) in september | 61°F | 64°F | cold swimming | Doëlan (Clohars-Carnoët) in september | 63°F | 66°F | cool swimming | Douarnenez in september | 62°F | 65°F | cold swimming | Fouesnant in september | 64°F | 66°F | cool swimming | Lannion in september | 62°F | 64°F | cold swimming | Le Crouesty in september | 65°F | 68°F | cool swimming |