Swimming in Fort-Mahon-Plage in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Fort-Mahon-Plage in september 2025.
In september, according to seasonal norms, the sea temperature in Fort-Mahon-Plage is:
Minimum: 63°F
Average: 65°F
Maximum: 67°F
Other useful seasonal weather averages in september:
- Outside temperature: 58°F to 66°F
- Most common weather: "Clear/Sunny"
- The wind blows at 8.1mph
- It rains a total of 3.5in, over 6 day(s).
Should we swim in Fort-Mahon-Plage in september?
Yes... and no. The water temperature in Fort-Mahon-Plage in september is cool
Swimming in september on the beaches of Fort-Mahon-Plage is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 67°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 62°F, 3.5in of precipitation (over 6 days) and 85.5 % humidity.
Water and normal seasonal temperatures in Fort-Mahon-Plage in september
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 67°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 58°F | ||
| Wind speed | 13.7mph | ||
| Wind temperature | 56°F | ||
| Precipitation | 3.5in | ||
| Number of days of rain | 6 jour(s) (19%) | ||
| Humidity | 86% | ||
| Visibility in kilometers | 9.36km | ||
| Cloud cover | 41% | ||
| Our opinion | cool swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Fort-Mahon-Plage
Swim elsewhere in Picardy in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Somme Bay in september | 65°F | 67°F | cool swimming | Quend Plage in september | 65°F | 67°F | cool swimming | Saint-Valery-sur-Somme in september | 65°F | 67°F | cool swimming |