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Sea Temperature in Cornwall in September
© Igor Pivovar
Complete information on the sea temperature range in the Atlantic Ocean in Cornwall in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Cornwall. 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 Cornwall in September
52°F
MINIMUN
62°F
AVERAGE
72°F
MAXIMUM
Historical Data of Water Temperature in September in Cornwall
Water Temperature Chart for Atlantic Ocean in Cornwall in September
Sea Temperature Table in Cornwall in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 70°C | 61°C | 66°C | 66°C |
| Sep 2 | 68°C | 63°C | 64°C | 65°C |
| Sep 3 | 68°C | 63°C | 64°C | 65°C |
| Sep 4 | 68°C | 63°C | 64°C | 65°C |
| Sep 5 | 68°C | 63°C | 64°C | 65°C |
| Sep 6 | 68°C | 63°C | 63°C | 64°C |
| Sep 7 | 66°C | 63°C | 63°C | 64°C |
| Sep 8 | 64°C | 64°C | 63°C | 64°C |
| Sep 9 | 64°C | 63°C | 63°C | 63°C |
| Sep 10 | 64°C | 64°C | 63°C | 64°C |
| Sep 11 | 64°C | 64°C | 63°C | 64°C |
| Sep 12 | 64°C | 64°C | 63°C | 64°C |
| Sep 13 | 63°C | 64°C | 63°C | 64°C |
| Sep 14 | 64°C | 64°C | 63°C | 64°C |
| Sep 15 | 63°C | 64°C | 63°C | 64°C |
| Sep 16 | 64°C | 63°C | 63°C | 63°C |
| Sep 17 | 63°C | 63°C | 63°C | 63°C |
| Sep 18 | 63°C | 63°C | 63°C | 63°C |
| Sep 19 | 64°C | 63°C | 63°C | 64°C |
| Sep 20 | 63°C | 63°C | 64°C | 64°C |
| Sep 21 | 63°C | 63°C | 64°C | 64°C |
| Sep 22 | 63°C | 63°C | 63°C | 63°C |
| Sep 23 | 63°C | 61°C | 63°C | 63°C |
| Sep 24 | 63°C | 61°C | 63°C | 62°C |
| Sep 25 | 64°C | 61°C | 63°C | 63°C |
| Sep 26 | 64°C | 61°C | 63°C | 63°C |
| Sep 27 | 63°C | 61°C | 63°C | 62°C |
| Sep 28 | 64°C | 61°C | 63°C | 62°C |
| Sep 29 | 64°C | 61°C | 63°C | 62°C |
Cornwall Climate and Swimming Opportunities in September
61°F
Average Day Air Temperature
48°F
Average Night Air Temperature
3 in
Precipitation Amount per Month
16 days
Number of Rainy Days
13 hrs
Daylight
per Day
4 hrs
Sunshine
per Day
11 mph
Average Wind Speed
88%
Average
humidity
Cornwall lies within the Prince Edward Island in Canada. The average daytime temperature in Cornwall in September is 16°C (61°F), while the nighttime average is 9°C (49°F). There are typically 16 rainy days during the month, with a total precipitation of 78 mm (3.1 inches). The daylight duration in September in Cornwall is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 18 km/h (11 mph), and the humidity level is around 88%.
The water temperature in Cornwall in September ranges from 16°C to 19°C (61°F to 66°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 Cornwall for September is 18°C (64°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 Cornwall
What is the sea temperature in Cornwall in September?
The water temperature in the Atlantic Ocean in Cornwall in September ranges from 16°C to 19°C (61°F to 66°F).
Is it possible to swim in the Atlantic Ocean in Cornwall in September?
The average sea temperature in Cornwall in September is 18°C (64°F), and the air temperature is 16°C (61°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.