Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 13.1 °C | 15.6 °C | 12 days | Possible, with trade-offs |
| February | 14 °C | 14.7 °C | 10 days | Possible, with trade-offs |
| March | 15.2 °C | 14.6 °C | 12 days | Possible, with trade-offs |
| April | 17.8 °C | 15.7 °C | 9 days | Possible, with trade-offs |
| May | 21.3 °C | 18.7 °C | 8 days | Pleasant — a good time to go |
| June | 26.3 °C | 23.2 °C | 3 days | Ideal — one of the best times of year |
| July | 29.3 °C | 26.4 °C | 2 days | Ideal — one of the best times of year |
| August | 29.5 °C | 27.1 °C | 3 days | Ideal — one of the best times of year |
| September | 26.1 °C | 25.2 °C | 9 days | Ideal — one of the best times of year |
| October | 22 °C | 22.4 °C | 11 days | Pleasant — a good time to go |
| November | 18.2 °C | 19.9 °C | 14 days | Possible, with trade-offs |
| December | 15 °C | 17.3 °C | 9 days | Possible, with trade-offs |
Before you go
Three things to check once you have picked your dates.
Entry
Italy 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 Ischia in May?
The sea averages 18.7°C in May — too cold for most swimmers.
How hot is Ischia in May?
Expect 21.3°C in the afternoon and 16.2°C at night, averaged over the last 10 years.
Does it rain a lot in Ischia in May?
Around 8 days with rain (≥ 1 mm) in the month — 27% of days.