Sea Temperature in Mers-les-Bains in September

© Annick Henniquin

Complete information on the sea temperature range in the English Channel in Mers-les-Bains in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Mers-les-Bains. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Mers-les-Bains Climate and Swimming Opportunities in September

Mers-les-Bains lies within the Hauts-de-France in France. The average daytime temperature in Mers-les-Bains in September is 20°C (68°F), while the nighttime average is 12°C (54°F). There are typically 10 rainy days during the month, with a total precipitation of 57 mm (2.2 inches). The daylight duration in September in Mers-les-Bains is 12 hours, with an average of 5 hours of sunshine per day. The average wind speed in September is 19 km/h (12 mph), and the humidity level is around 82%.

The water temperature in Mers-les-Bains in September ranges from 17°C to 18°C (63°F to 64°F). At the beginning of the month, the average temperature is around 18°C (64°F), shifting to 17°C (63°F) by mid-September and reaching 17°C (63°F) in the last ten days. Overall, the average sea temperature in Mers-les-Bains for September is 18°C (64°F). Very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.

Frequently Asked Questions About Water Temperatures in September in Mers-les-Bains