How cold is Kefalonia water in summer? In June sea water temperature throughout Kefalonia warms above 20°C and it is enough for a comfortable bath. Based on average water temperature observations over the past ten years, the warmest sea in Kefalonia in June was 23.2°C (in Fteri Beach), and the coldest water 22.8°C (in Argostoli). To find out the sea temperature today and in the coming days, go to Current sea temperature in Kefalonia
Kefalonia cities and resorts with the values of the average water temperature in June in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.
To find out what the water temperature was in Kefalonia any day over a period of the last ten years, select the month