Sea Temperature in Helsinki in September

© pixabay.com

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

Helsinki Climate and Swimming Opportunities in September

Helsinki lies within the Southern Finland Province in Finland. The average daytime temperature in Helsinki in September is 14°C (57°F), while the nighttime average is 8°C (46°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 Helsinki is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 14 km/h (9 mph), and the humidity level is around 83%.

The water temperature in Helsinki in September ranges from 12°C to 17°C (54°F to 63°F). At the beginning of the month, the average temperature is around 16°C (61°F), shifting to 15°C (59°F) by mid-September and reaching 14°C (57°F) in the last ten days. Overall, the average sea temperature in Helsinki for September is 15°C (59°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 Helsinki