Avg weather in May
14 Hrs per day
28 mm per month
69 % avg
7 Mph avg


What’s the weather like in Kefalonia in May?

Kefalonia is in the Ionian Sea off the southwest coast of Greece. This means the island has Mediterranean weather that gets hotter in May, so you’ll have plenty of sunny weather and not much rain if you go at this time. May’s one of the driest months of the year but you’ll be kept cool by breezes on the coast and the occasional thunderstorm.


The average high in Kefalonia is 23ºC in May. This cools to 13ºC at night, so you should bring some warmer clothes for the evenings. The sea temperature is 19ºC, while humidity’s low. There’s 32mm of rain over seven days, and you can expect 14 hours of daylight with nine hours of sunshine each day. Make sure you use plenty of sun cream as UV levels will very high. The sun goes down at around 8.30pm at the start of the month and gradually gets later.

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