In April sea water temperature all along the Ionian Sea coast is not yet warm enough for swimming and does not exceed 20°C. The warmest average water temperature Ionian Sea in April is 16.8°C (in Zacharo, Greece), and the coldest sea surface temperature is 15.1°C (in Marina di Sibari, Italy). To find out the sea temperature today and in the coming days, go to Current sea temperature of the Ionian Sea
This data on the average monthly surface water temperature on the Ionian Sea coast in April. To see the details, select the country and then the city of your interest. Besides water temperature, you can also get information about the weather for today, tomorrow and the upcoming days, surf forecast, as well as the data on sunrise/sunset and moonrise/moonset at a given point on any given day.