Santorini weather in May 2025

Expect 22°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Santorini in May. Check more long-term weather averages for Santorini in May before you book your next holiday to Santorini in 2025/2026.

  • 22°C maximum daytime temperature in May in Santorini (Thira)22
    22°C max day temperature
  • 10 hours of sunshine per day
  • 3 days with some rainfall in May in Santorini (Thira)3
    3 days with some rainfall
  • 15°C minimum night-time temperature in May in Santorini (Thira)15
    15°C min night temperature
  • 14 hours of daylight per day in May in Santorini (Thira)14
    14 hours of daylight per day
  • No heat & humidity in May in Santorini (Thira)0
    No heat & humidity
  • 14 mm monthly rainfall in May in Santorini (Thira)14
    14 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Santorini (Thira)8
    8 (Very High) UV index
  • 19°C sea temperature in May in Santorini (Thira)19
    19°C sea temperature

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The May 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 May. 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 May?

Daytime temperatures usually reach 22°C in Thira, Santorini in May, falling to 15°C at night.

How sunny is it in Santorini in May?

There are normally 10 hours of bright sunshine each day in Thira, Santorini in May - that's 73% of daylight hours.

How warm is the sea around Santorini in May?

The average sea temperature around Thira, Santorini in May is 19°C.

Does it ever rain in Santorini in May?

There are usually 3 days with some rain in Thira, Santorini in May and the average monthly rainfall is 14mm.

Santorini May sunrise & sunset times

Browse the sunrise and sunset times for Santorini in May 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
Thursday, 1st May 2025 05:25 19:06
Friday, 16th May 2025 05:11 19:19
Saturday, 31st May 2025 05:02 19:30

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