Sea Temperature in Gastes in September

© Guenaelle Audran

Complete information on the sea temperature range in the Bay of Biscay in Gastes in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Gastes. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Gastes Climate and Swimming Opportunities in September

Gastes lies within the Nouvelle-Aquitaine in France. The average daytime temperature in Gastes in September is 23°C (74°F), while the nighttime average is 13°C (56°F). There are typically 10 rainy days during the month, with a total precipitation of 83 mm (3.3 inches). The daylight duration in September in Gastes is 12 hours, with an average of 6 hours of sunshine per day. The average wind speed in September is 11 km/h (7 mph), and the humidity level is around 75%.

The water temperature in Gastes in September ranges from 17°C to 21°C (63°F to 70°F). At the beginning of the month, the average temperature is around 21°C (70°F), shifting to 20°C (68°F) by mid-September and reaching 19°C (66°F) in the last ten days. Overall, the average sea temperature in Gastes for September is 20°C (68°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 Gastes