Swimming in Cornwall in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Cornwall in september 2025.
In september, according to seasonal norms, the sea temperature in Cornwall is:
Minimum: 59°F
Average: 62°F
Maximum: 65°F
Other useful seasonal weather averages in september:
- Outside temperature: 58°F to 63°F
- Most common weather: "Clear/Sunny"
- The wind blows at 8.7mph
- It rains a total of 3.1in, over 5 day(s).
Should we swim in Cornwall in september?
No... The water temperature in Cornwall in september is cold
Swimming in Cornwall in september is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average sea temperature of 62°F (minimum: 59°F - maximum: 65°F).
Note also that in september, the climate is good with an average outside temperature of 61°F, 3.1in of precipitation (over 5 days) and 86.46 % humidity.
Water and normal seasonal temperatures in Cornwall in september
| September | |||
| Average sea temperature | 62°F | ||
| Minimum sea temperature | 59°F | ||
| Maximum sea temperature | 65°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 63°F | ||
| Minimum outside temperature | 59°F | ||
| Wind speed | 16.2mph | ||
| Wind temperature | 58°F | ||
| Precipitation | 3.1in | ||
| Number of days of rain | 5 jour(s) (17%) | ||
| Humidity | 87% | ||
| Visibility in kilometers | 9.29km | ||
| Cloud cover | 46% | ||
| Our opinion | cold swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Cornwall
Swim elsewhere in England in september
| City | Average T° | Min. T° | Max. T° | Our opinion | London in september | 64°F | 66°F | cool swimming | Brighton in september | 64°F | 65°F | cool swimming | Bristol in september | 62°F | 64°F | cold swimming | Exmouth in september | 62°F | 64°F | cold swimming | Isle of Wight in september | 64°F | 65°F | cool swimming | Jersey in september | 65°F | 67°F | cool swimming | Liverpool in september | 61°F | 63°F | cold swimming | Plymouth in september | 61°F | 63°F | cold swimming | Skegness in september | 59°F | 63°F | cold swimming | Torquay in september | 62°F | 64°F | cold swimming | Dover in september | 64°F | 67°F | cool swimming | Guernsey in september | 64°F | 66°F | cool swimming | Hull (Kingston-upon-Hull) in september | 60°F | 63°F | cold swimming | Isles of Scilly in september | 63°F | 66°F | cold swimming | Margate in september | 65°F | 67°F | cool swimming | Falmouth in september | 62°F | 64°F | cold swimming | Folkestone in september | 65°F | 67°F | cool swimming | Hunstanton in september | 62°F | 64°F | cold swimming | Lowestoft in september | 63°F | 66°F | cool swimming | Newcastle in september | 59°F | 62°F | freezing swimming |