Avg weather in August
13 Hrs per day
3 mm per month
67 % avg
13 Mph avg

Kos Weather in August

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What’s the weather like in Kos in August?

For hot, sunny days and warm, relaxing evenings, Kos is a must-visit holiday destination during the month of August. With clear skies and almost no rain, this is one of the most popular times of the year to enjoy the beautiful Mediterranean climate on this stunning Greek island. For the hottest weather, visit the island at the start of the month when temperatures are slightly warmer.


On average, August days in Kos are around 26°C, with highs of 31°C in the peak of the afternoon. After dark, temperatures dip only slightly to around 22°C, so you’ll be grateful for air conditioning when you get into bed at night. Around 5mm of rain is expected through the month, so the chance of showers is very low. Each day has around 13 hours of sunshine and with a sea temperature of 26°C, this time of year is perfect for relaxing days on the beach.

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