Kefalonia weather in August 2025

Expect 30°C daytime maximum temperatures in the shade with on average 12 hours of sunshine per day in Kefalonia in August. Check more long-term weather averages for Kefalonia in August before you book your next holiday to Kefalonia in 2025/2026.

  • 30°C maximum daytime temperature in August in Kefalonia (Argostoli)30
    30°C max day temperature
  • 12 hours of sunshine per day
  • 2 days with some rainfall in August in Kefalonia (Argostoli)2
    2 days with some rainfall
  • 19°C minimum night-time temperature in August in Kefalonia (Argostoli)19
    19°C min night temperature
  • 14 hours of daylight per day in August in Kefalonia (Argostoli)14
    14 hours of daylight per day
  • High heat & humidity in August in Kefalonia (Argostoli)H
    High heat & humidity
  • 14 mm monthly rainfall in August in Kefalonia (Argostoli)14
    14 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Kefalonia (Argostoli)9
    9 (Very High) UV index
  • 26°C sea temperature in August in Kefalonia (Argostoli)26
    26°C sea temperature

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The August weather guide for Kefalonia (Argostoli) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Kefalonia destinations

Below are average maximum temperatures at popular countries, regions and places in Kefalonia in August. Select a holiday destination to see more weather parameters.

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Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Kefalonia in August?

Daytime temperatures usually reach 30°C in Argostoli, Kefalonia in August with high heat and humidity, falling to 19°C at night.

How sunny is it in Kefalonia in August?

There are normally 12 hours of bright sunshine each day in Argostoli, Kefalonia in August - that's 85% of daylight hours.

How warm is the sea around Kefalonia in August?

The average sea temperature around Argostoli, Kefalonia in August is 26°C.

Does it ever rain in Kefalonia in August?

There are usually 2 days with some rain in Argostoli, Kefalonia in August and the average monthly rainfall is 14mm.

Kefalonia August sunrise & sunset times

Browse the sunrise and sunset times for Kefalonia in August 2025. Select a month to view Kefalonia sunrise and sunset times for the next 12 months. The Kefalonia sunrise and sunset times shown below are for Argostoli.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:41 19:48
Saturday, 16th August 2025 05:54 19:30
Sunday, 31st August 2025 06:07 19:09

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