Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 14.3 °C | 18.2 °C | 14 days | Possible, with trade-offs |
| February | 15.2 °C | 17.2 °C | 10 days | Possible, with trade-offs |
| March | 16.3 °C | 17.2 °C | 9 days | Possible, with trade-offs |
| April | 19.5 °C | 18 °C | 5 days | Pleasant — a good time to go |
| May | 23.3 °C | 20.1 °C | 4 days | Pleasant — a good time to go |
| June | 27.5 °C | 22.7 °C | 1 day | Ideal — one of the best times of year |
| July | 30.1 °C | 24.6 °C | 0 day | Ideal — one of the best times of year |
| August | 30 °C | 26 °C | 0 day | Ideal — one of the best times of year |
| September | 27.6 °C | 25.2 °C | 2 days | Ideal — one of the best times of year |
| October | 23.7 °C | 23.2 °C | 3 days | Pleasant — a good time to go |
| November | 20.2 °C | 21.5 °C | 9 days | Pleasant — a good time to go |
| December | 16.3 °C | 19.8 °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 Kos in June?
The sea averages 22.7°C in June — swimming is possible but brisk.
How hot is Kos in June?
Expect 27.5°C in the afternoon and 21.9°C at night, averaged over the last 10 years.
Does it rain a lot in Kos in June?
Around 1 days with rain (≥ 1 mm) in the month — 4% of days.