Sea Temperature in Vaasa in September

© Osmo Lampinen

Complete information on the sea temperature range in the Gulf of Bothnia in Vaasa in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Vaasa. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Vaasa Climate and Swimming Opportunities in September

Vaasa lies within the Western Finland Province in Finland. The average daytime temperature in Vaasa in September is 14°C (57°F), while the nighttime average is 7°C (45°F). There are typically 11 rainy days during the month, with a total precipitation of 59 mm (2.3 inches). The daylight duration in September in Vaasa is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 16 km/h (10 mph), and the humidity level is around 83%.

The water temperature in Vaasa in September ranges from 11°C to 15°C (52°F to 59°F). At the beginning of the month, the average temperature is around 14°C (57°F), shifting to 14°C (57°F) by mid-September and reaching 12°C (54°F) in the last ten days. Overall, the average sea temperature in Vaasa for September is 13°C (55°F). The water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.

Frequently Asked Questions About Water Temperatures in September in Vaasa