Santorini weather in August 2025

Expect 27°C daytime maximum temperatures in the shade with on average 12 hours of sunshine per day in Santorini in August. Check more long-term weather averages for Santorini in August before you book your next holiday to Santorini in 2025/2026.

  • 27°C maximum daytime temperature in August in Santorini (Thira)27
    27°C max day temperature
  • 12 hours of sunshine per day
  • 1 day with some rainfall in August in Santorini (Thira)1
    1 day with some rainfall
  • 22°C minimum night-time temperature in August in Santorini (Thira)22
    22°C min night temperature
  • 13 hours of daylight per day in August in Santorini (Thira)13
    13 hours of daylight per day
  • Moderate heat & humidity in August in Santorini (Thira)M
    Moderate heat & humidity
  • 1 mm monthly rainfall in August in Santorini (Thira)1
    1 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Santorini (Thira)9
    9 (Very High) UV index
  • 24°C sea temperature in August in Santorini (Thira)24
    24°C sea temperature

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The August weather guide for Santorini (Thira) 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 Santorini destinations

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

All Santorini destinations

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

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How hot is it in Santorini in August?

Daytime temperatures usually reach 27°C in Thira, Santorini in August with moderate heat and humidity, falling to 22°C at night.

How sunny is it in Santorini in August?

There are normally 12 hours of bright sunshine each day in Thira, Santorini in August - that's 92% of daylight hours.

How warm is the sea around Santorini in August?

The average sea temperature around Thira, Santorini in August is 24°C.

Does it ever rain in Santorini in August?

There is usually 1 day with some rain in Thira, Santorini in August and the average monthly rainfall is 1mm.

Santorini August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:25 19:24
Saturday, 16th August 2025 05:37 19:08
Sunday, 31st August 2025 05:49 18:48

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