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Sea Temperature in Boulogne-sur-Mer in September
Complete information on the sea temperature range in the English Channel in Boulogne-sur-Mer in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Boulogne-sur-Mer. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Boulogne-sur-Mer in September
15°C
MINIMUN
17.5°C
AVERAGE
20°C
MAXIMUM
Historical Data of Water Temperature in September in Boulogne-sur-Mer
Water Temperature Chart for English Channel in Boulogne-sur-Mer in September
Sea Temperature Table in Boulogne-sur-Mer in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 16°C | 19°C | 16°C | 17.5°C |
| Sep 2 | 16°C | 19°C | 17°C | 17.5°C |
| Sep 3 | 16°C | 19°C | 16°C | 17.5°C |
| Sep 4 | 17°C | 19°C | 19°C | 18.5°C |
| Sep 5 | 17°C | 19°C | 18°C | 18.3°C |
| Sep 6 | 17°C | 20°C | 18°C | 18.5°C |
| Sep 7 | 18°C | 18°C | 17°C | 18.0°C |
| Sep 8 | 16°C | 19°C | 17°C | 17.8°C |
| Sep 9 | 16°C | 19°C | 17°C | 17.8°C |
| Sep 10 | 16°C | 19°C | 18°C | 18.0°C |
| Sep 11 | 16°C | 18°C | 18°C | 17.5°C |
| Sep 12 | 17°C | 18°C | 17°C | 17.8°C |
| Sep 13 | 16°C | 19°C | 19°C | 18.0°C |
| Sep 14 | 17°C | 19°C | 16°C | 17.5°C |
| Sep 15 | 16°C | 19°C | 17°C | 17.5°C |
| Sep 16 | 15°C | 19°C | 16°C | 17.0°C |
| Sep 17 | 16°C | 19°C | 16°C | 17.0°C |
| Sep 18 | 19°C | 19°C | 17°C | 18.0°C |
| Sep 19 | 19°C | 19°C | 18°C | 18.3°C |
| Sep 20 | 18°C | 19°C | 18°C | 18.3°C |
| Sep 21 | 18°C | 19°C | 16°C | 17.8°C |
| Sep 22 | 19°C | 19°C | 17°C | 18.3°C |
| Sep 23 | 18°C | 19°C | 18°C | 18.3°C |
| Sep 24 | 19°C | 18°C | 17°C | 18.0°C |
| Sep 25 | 18°C | 19°C | 19°C | 18.3°C |
| Sep 26 | 19°C | 18°C | 17°C | 17.8°C |
| Sep 27 | 18°C | 18°C | 19°C | 18.3°C |
| Sep 28 | 18°C | 18°C | 17°C | 17.5°C |
| Sep 29 | 18°C | 17°C | 17°C | 17.3°C |
Boulogne-sur-Mer Climate and Swimming Opportunities in September
20°C
Average Day Air Temperature
13°C
Average Night Air Temperature
53 mm
Precipitation Amount per Month
10 days
Number of Rainy Days
12 hrs
Daylight
per Day
5 hrs
Sunshine
per Day
19 km/h
Average Wind Speed
83%
Average
humidity
Boulogne-sur-Mer lies within the Hauts-de-France in France. The average daytime temperature in Boulogne-sur-Mer in September is 20°C (68°F), while the nighttime average is 13°C (55°F). There are typically 10 rainy days during the month, with a total precipitation of 53 mm (2.1 inches). The daylight duration in September in Boulogne-sur-Mer 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 83%.
The water temperature in Boulogne-sur-Mer 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 18°C (64°F) by mid-September and reaching 18°C (64°F) in the last ten days. Overall, the average sea temperature in Boulogne-sur-Mer 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.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Boulogne-sur-Mer
What is the sea temperature in Boulogne-sur-Mer in September?
The water temperature in the English Channel in Boulogne-sur-Mer in September ranges from 17°C to 18°C (63°F to 64°F).
Is it possible to swim in the English Channel in Boulogne-sur-Mer in September?
The average sea temperature in Boulogne-sur-Mer in September is 18°C (64°F), and the air temperature is 20°C (68°F), so very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.