Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 13.9 °C | 17.2 °C | 11 days | Possible, with trade-offs |
| February | 14.7 °C | 16.8 °C | 8 days | Possible, with trade-offs |
| March | 15.8 °C | 16.8 °C | 8 days | Possible, with trade-offs |
| April | 19 °C | 17.5 °C | 4 days | Possible, with trade-offs |
| May | 22.7 °C | 19.4 °C | 3 days | Pleasant — a good time to go |
| June | 26.8 °C | 22.4 °C | 1 day | Ideal — one of the best times of year |
| July | 28.9 °C | 23.9 °C | 0 day | Ideal — one of the best times of year |
| August | 28.6 °C | 24.8 °C | 0 day | Ideal — one of the best times of year |
| September | 26.4 °C | 24.3 °C | 2 days | Ideal — one of the best times of year |
| October | 22.6 °C | 22.3 °C | 2 days | Pleasant — a good time to go |
| November | 19.2 °C | 20.1 °C | 6 days | Pleasant — a good time to go |
| December | 15.7 °C | 18.1 °C | 9 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 Íos in March?
The sea averages 16.8°C in March — too cold for most swimmers.
How hot is Íos in March?
Expect 15.8°C in the afternoon and 12.1°C at night, averaged over the last 10 years.
Does it rain a lot in Íos in March?
Around 8 days with rain (≥ 1 mm) in the month — 25% of days.