Heraklion weather in May 2026

Q: How hot is it in Heraklion in May?

Daytime temperatures usually reach 23°C in Heraklion in May, falling to 14°C at night.

Q: How sunny is it in Heraklion in May?

There are normally 10 hours of bright sunshine each day in Heraklion in May - that's 69% of daylight hours.

Q: How warm is the sea around Heraklion in May?

The average sea temperature around Heraklion in May is 19°C.

Q: Does it ever rain in Heraklion in May?

There are usually 3 days with some rain in Heraklion in May and the average monthly rainfall is 20mm.

Expect daytime maximum temperatures of 73°F in Heraklion, Crete in May based on long-term weather averages. There are 10 hours of sunshine per day on average.

73
73°F max day temperature
10
10 hours of sunshine per day
3
3 days with some rainfall
57
57°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
0.8
0.8 inches of monthly rainfall
9
9 (Very High) UV index
66
66°F sea temperature

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The May weather guide for Crete (Heraklion) 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)