Sea Temperature in Brest in September

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

Brest Climate and Swimming Opportunities in September

Brest lies within the Brittany in France. The average daytime temperature in Brest in September is 20°C (67°F), while the nighttime average is 12°C (54°F). There are typically 10 rainy days during the month, with a total precipitation of 76 mm (3.0 inches). The daylight duration in September in Brest is 12 hours, with an average of 6 hours of sunshine per day. The average wind speed in September is 19 km/h (12 mph), and the humidity level is around 84%.

The water temperature in Brest in September ranges from 15°C to 17°C (59°F to 63°F). At the beginning of the month, the average temperature is around 17°C (63°F), shifting to 16°C (61°F) by mid-September and reaching 16°C (61°F) in the last ten days. Overall, the average sea temperature in Brest for September is 16°C (61°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Frequently Asked Questions About Water Temperatures in September in Brest