Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 15.2 °C | 16.9 °C | 12 days | Possible, with trade-offs |
| February | 16.2 °C | 16.2 °C | 10 days | Possible, with trade-offs |
| March | 17.7 °C | 16.4 °C | 10 days | Possible, with trade-offs |
| April | 21.5 °C | 17.5 °C | 4 days | Pleasant — a good time to go |
| May | 25 °C | 19.7 °C | 6 days | Ideal — one of the best times of year |
| June | 28.9 °C | 23.1 °C | 3 days | Ideal — one of the best times of year |
| July | 31 °C | 25.5 °C | 1 day | Ideal — one of the best times of year |
| August | 30.9 °C | 26.2 °C | 2 days | Ideal — one of the best times of year |
| September | 28.6 °C | 25.4 °C | 5 days | Ideal — one of the best times of year |
| October | 24.5 °C | 23.3 °C | 5 days | Ideal — one of the best times of year |
| November | 21.1 °C | 20.9 °C | 8 days | Pleasant — a good time to go |
| December | 17.1 °C | 18.6 °C | 11 days | Possible, with trade-offs |
Before you go
Three things to check once you have picked your dates.
Entry
Greece is in the European Union. Entry rules depend on your nationality — check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 11 August 2026
Health
Recommended vaccinations, water quality, mosquitoes: advice depends on the country and the season. Some vaccines need time before departure.
Beau Fixe is not a safety or health authority. These notes summarise public advisories and link to their source; only the competent authorities are authoritative. Alert levels: Foreign, Commonwealth & Development Office (gov.uk), Open Government Licence v3.0.
FAQ
Can you swim in Héraklion (Crète) in September?
The sea averages 25.4°C in September — yes, pleasant swimming.
How hot is Héraklion (Crète) in September?
Expect 28.6°C in the afternoon and 20.7°C at night, averaged over the last 10 years.
Does it rain a lot in Héraklion (Crète) in September?
Around 5 days with rain (≥ 1 mm) in the month — 16% of days.