Weather in September
Sea temperature
In September, the average sea temperature in Velkua, Finland, is 9.8°C (49.6°F).Note: Unprotected swimming in 9.8°C (49.6°F) is dangerous due to potential cold shock. Especially when temperatures go below 10°C (50°F), leading to hyperventilation.
Daylight
In September, the average length of the day is 12h and 53min.On the first day of September, sunrise is at 06:28 and sunset at 20:37. On the last day of the month, sunrise is at 07:38 and sunset at 19:08 EEST.
Frequently asked questions
How cold is the water in September in Velkua?
In Velkua, Finland, in September, the average water temperature is 9.8°C (49.6°F). Swimming in 9.8°C (49.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
What is the average length of the day in September in Velkua?
In Velkua, Finland, the average day length in September is 12h and 53min.
What time are sunrise and sunset in September in Velkua?
On the first day of September in Velkua, Finland, sunrise is at 06:28 and sunset at 20:37. On the last day of the month, sunrise is at 07:38 and sunset at 19:08 EEST.
Average sea temperature in September
Velkua, Finland
- Average sea temperature in September: 9.8°C
The best month for swimming (with the highest average sea temperature) is August (12.4°C).
The coldest months (with the lowest average sea temperature) are February and March (-0.2°C).
Average daylight in September
Velkua, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
Velkua, Finland
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