Weather in Kefalonia

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Kefalonia is the largest Greek island and enjoys a warm Mediterranean climate with sizzling temperatures and plenty of sunshine throughout the year. For cooler weather, travel in winter. It’s still fairly mild during the day with an average temperature high of 13°C. The coldest month is January, which has nightly lows of 5°C. The weather in Kefalonia is quite wet and overcast in the cold months with around 115mm of rain in December that drops to 55mm in February.

Kefalonia weather in spring is much more enjoyable with temperatures ranging from 12°C to 22°C across the season. You can expect around 12 hours of sunshine a day, which is great if you want to spend a lot of time outside soaking up the sun. The sea is too cold for swimming in winter but it gets warmer in spring with average water temperatures starting at 15°C in March and rising to 19°C in May. There’s not much rain between March and May with around 20mm to 45mm of rainfall per month.

Between June and August, temperatures in Kefalonia reach highs of 30°C, which is perfect for relaxing on the beach and exploring the local attractions. July is the warmest month of the year and the sunniest with up to 14 hours of sunlight a day. Winds blow in from the northeast, helping to clear the skies and keep humidity levels under control. Swimming in the sea is a pleasant pastime in the summer with an average sea temperature of 25°C.

Annual weather overview

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