Weather in September
September witnesses a drop in sea temperatures to 15.1°C (59.2°F), hinting at the onset of autumn. The changing season colours
Porvoo's streets and parks in beautiful shades of orange and red. Despite the cooling weather, outdoor activities remain popular, particularly hiking and cycling. The fall-inspired menu in local restaurants and the weekend farmers' market are reminders of the fruitful harvest season.
Sea temperature
In Porvoo,
Finland, in September, the average water temperature is 15.1°C (59.2°F).
Note: For most people, swimming in water at 15.1°C (59.2°F) is not a pleasurable experience. Breathing control gets harder as the water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In September, the average length of the day is 12h and 53min.
On the first day of the month, sunrise is at 06:12 and sunset at 20:21. On the last day of September, in Porvoo, sunrise is at 07:21 and sunset at 18:52 EEST.
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