Thira weather in September 2026

Q: How hot is it in Thira in September?

Daytime temperatures usually reach 25°C in Thira in September with low heat and humidity, falling to 20°C at night.

Q: How sunny is it in Thira in September?

There are normally 10 hours of bright sunshine each day in Thira in September - that's 83% of daylight hours.

Q: How warm is the sea around Thira in September?

The average sea temperature around Thira in September is 24°C.

Q: Does it ever rain in Thira in September?

There is usually 1 day with some rain in Thira in September and the average monthly rainfall is 13mm.

Expect daytime maximum temperatures of 77°F in Thira, Santorini in September based on long-term weather averages. There are 10 hours of sunshine per day on average.

77
77°F max day temperature
10
10 hours of sunshine per day
1
1 day with some rainfall
68
68°F min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
0.5
0.5 inches of monthly rainfall
7
7 (High) UV index
75
75°F sea temperature

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The September 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.

Metric (°C) | Imperial (°F)