Swimming in Lannion in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Lannion in september 2025.
In september, according to seasonal norms, the sea temperature in Lannion is:
Minimum: 59°F
Average: 62°F
Maximum: 64°F
Other useful seasonal weather averages in september:
- Outside temperature: 57°F to 65°F
- Most common weather: "Clear/Sunny"
- The wind blows at 8.1mph
- It rains a total of 2.7in, over 4 day(s).
Should we swim in Lannion in september?
No... The water temperature in Lannion in september is cold
Swimming in Lannion in september is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average sea temperature of 62°F (minimum: 59°F - maximum: 64°F).
Note also that in september, the climate is good with an average outside temperature of 61°F, 2.7in of precipitation (over 4 days) and 87.85 % humidity.
Water and normal seasonal temperatures in Lannion in september
| September | |||
| Average sea temperature | 62°F | ||
| Minimum sea temperature | 59°F | ||
| Maximum sea temperature | 64°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 58°F | ||
| Wind speed | 13.7mph | ||
| Wind temperature | 56°F | ||
| Precipitation | 2.7in | ||
| Number of days of rain | 4 jour(s) (14%) | ||
| Humidity | 88% | ||
| Visibility in kilometers | 9.35km | ||
| Cloud cover | 41% | ||
| Our opinion | cold swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Lannion
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 | Belle-Île-en-Mer 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 | Le Crouesty in september | 65°F | 68°F | cool swimming |