Sea temperature - Kostrena

The sea temperature in Kostrena is the same as the sea temperature in the city of Rijeka, [LINK] since Kostrena is part of the city of Rijeka. Due to its exposure to the open sea, the wind plays a major role in the sea temperature in Kostrena, mixing cold deep sea and warm surface sea. The sea temperature in Kostrena is suitable for swimming during all summer months when the average sea temperature is 22 degrees Celsius, and the sea temperature reaches a maximum of 28 degrees Celsius. In the early spring months, as well as winter months, swimming should be avoided as the sea temperature in Kostrena then drops to 8 degrees Celsius. The sea temperature in Kostrena is suitable for swimming even in the month of September, so more and more tourist arrivals and overnight stays are recorded in this month.