Sea Temperature in Koszalin in September

© Zagroda Jamneńska

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

Koszalin Climate and Swimming Opportunities in September

Koszalin lies within the West Pomeranian Voivodeship in Poland. The average daytime temperature in Koszalin in September is 18°C (64°F), while the nighttime average is 11°C (52°F). There are typically 11 rainy days during the month, with a total precipitation of 76 mm (3.0 inches). The daylight duration in September in Koszalin is 13 hours, with an average of 5 hours of sunshine per day. The average wind speed in September is 14 km/h (9 mph), and the humidity level is around 81%.

The water temperature in Koszalin in September ranges from 15°C to 18°C (59°F to 64°F). At the beginning of the month, the average temperature is around 18°C (64°F), shifting to 17°C (63°F) by mid-September and reaching 16°C (61°F) in the last ten days. Overall, the average sea temperature in Koszalin for September is 17°C (63°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Frequently Asked Questions About Water Temperatures in September in Koszalin