Avg weather in August
13 Hrs per day
4 mm per month
69 % avg
9 Mph avg


What’s the weather like in Kefalonia in August?

Sitting in the Ionian Sea, the Greek island of Kefalonia has a Mediterranean climate with hot, dry summers and mild, wet winters. August is the hottest month on the island, perfect for enjoying the warm golden sunshine, stunning beaches and sparkling blue waters. If you’re not a fan of intense heat, the cooling Meltemi winds which blow off the sea will be welcome.


On average, Kefalonia has beautifully warm daytime temperatures of 26°C, with highs of 29°C in the hottest part of the afternoon. At night the temperature drops to 18°C, so you may need a few light layers for evenings out. For days on the beach, at this time of year you’ll see 13 hours of sunshine each day, while the sea’s a warm 26°C, ideal for swimming and snorkelling. With just 5mm of rain expected in August, there’s little chance of showers on your holiday to Kefalonia at this time of year.

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