Sea Temperature in Port-Louis in September

Complete information on the sea temperature range in the Bay of Biscay in Port-Louis in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Port-Louis. 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 Port-Louis in September

15°C

MINIMUN

17.5°C

AVERAGE

20°C

MAXIMUM

Historical Data of Water Temperature in September in Port-Louis

Water Temperature Chart for Bay of Biscay in Port-Louis in September

Sea Temperature Table in Port-Louis in September Over the Past Years

Day	2024	2023	2022	Average
Sep 1	18°C	18°C	18°C	18.0°C
Sep 2	18°C	19°C	18°C	18.3°C
Sep 3	18°C	19°C	18°C	18.3°C
Sep 4	19°C	19°C	18°C	18.5°C
Sep 5	18°C	19°C	18°C	18.3°C
Sep 6	18°C	18°C	17°C	17.8°C
Sep 7	19°C	18°C	17°C	17.8°C
Sep 8	19°C	18°C	18°C	18.3°C
Sep 9	19°C	19°C	17°C	18.3°C
Sep 10	18°C	19°C	17°C	17.8°C
Sep 11	19°C	19°C	16°C	17.8°C
Sep 12	19°C	18°C	16°C	17.5°C
Sep 13	19°C	19°C	16°C	17.8°C
Sep 14	18°C	18°C	16°C	17.3°C
Sep 15	19°C	19°C	16°C	17.5°C
Sep 16	18°C	19°C	16°C	17.3°C
Sep 17	18°C	18°C	16°C	16.8°C
Sep 18	19°C	18°C	16°C	17.0°C
Sep 19	18°C	18°C	16°C	17.0°C
Sep 20	18°C	19°C	16°C	17.0°C
Sep 21	18°C	18°C	16°C	17.0°C
Sep 22	19°C	18°C	16°C	17.3°C
Sep 23	18°C	19°C	16°C	17.3°C
Sep 24	17°C	19°C	16°C	17.0°C
Sep 25	17°C	18°C	16°C	16.5°C
Sep 26	18°C	17°C	16°C	16.8°C
Sep 27	17°C	17°C	16°C	16.5°C
Sep 28	17°C	17°C	15°C	16.3°C
Sep 29	17°C	16°C	16°C	16.0°C

Port-Louis Climate and Swimming Opportunities in September

20°C

Average Day Air Temperature

14°C

Average Night Air Temperature

59 mm

Precipitation Amount per Month

10 days

Number of Rainy Days

12 hrs

Daylight
per Day

6 hrs

Sunshine
per Day

17 km/h

Average Wind Speed

81%

Average
humidity

Port-Louis lies within the Brittany in France. The average daytime temperature in Port-Louis in September is 20°C (67°F), while the nighttime average is 14°C (56°F). There are typically 10 rainy days during the month, with a total precipitation of 59 mm (2.3 inches). The daylight duration in September in Port-Louis is 12 hours, with an average of 6 hours of sunshine per day. The average wind speed in September is 17 km/h (11 mph), and the humidity level is around 81%.

The water temperature in Port-Louis in September ranges from 16°C to 18°C (61°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 17°C (63°F) in the last ten days. Overall, the average sea temperature in Port-Louis for September is 17°C (63°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in September in Nearby Cities

Frequently Asked Questions About Water Temperatures in September in Port-Louis

What is the sea temperature in Port-Louis in September?

The water temperature in the Bay of Biscay in Port-Louis in September ranges from 16°C to 18°C (61°F to 64°F).

Is it possible to swim in the Bay of Biscay in Port-Louis in September?

The average sea temperature in Port-Louis in September is 17°C (63°F), and the air temperature is 20°C (67°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.