Sea Temperature in Lošinj in September

© Milena Radić

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

Lošinj Climate and Swimming Opportunities in September

Lošinj lies within the Primorje-Gorski Kotar County in Croatia. The average daytime temperature in Lošinj in September is 24°C (75°F), while the nighttime average is 15°C (59°F). There are typically 10 rainy days during the month, with a total precipitation of 120 mm (4.7 inches). The daylight duration in September in Lošinj is 12 hours, with an average of 7 hours of sunshine per day. The average wind speed in September is 10 km/h (6 mph), and the humidity level is around 68%.

The water temperature in Lošinj in September ranges from 21°C to 25°C (70°F to 77°F). At the beginning of the month, the average temperature is around 25°C (77°F), shifting to 24°C (75°F) by mid-September and reaching 22°C (72°F) in the last ten days. Overall, the average sea temperature in Lošinj for September is 23°C (73°F). Optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.

Frequently Asked Questions About Water Temperatures in September in Lošinj