Warm in May
25°C average high
avg high · 15° at night
25°C+ on 5 in 10 days
Greece
Santorini weather in May
Is it warm? Mostly. May in Santorini is mild: afternoons average 24°C and nights 17°C. Most days (80%) peak between 21°C and 26°C.
Mild · average high
24°C
25°C or more on about two in ten days; 20°C or more on almost every day.
- Average low17°overnight
- Sea19°average, 2022–2025
- Rainy days19 mm in the month
- SkySome cloud27% cloud · 64% clear days
How warm it really gets
Every May afternoon from 2011–2025: 465 days. Most (80%) peaked between 21° and 26°.
May, year by year
The average May high in each year. The warmest, 2018, averaged 25°C; the coolest, 2023, 22°C.
Compared with home
Average May highs. Expect rain on about 1 day (9 mm in a typical month).
- Santorini24°
- London19°
- Glasgow17°
- Manchester16°
- Cork16°
- Belfast16°
- Dublin16°
Warmer in May, not much further
Flying times are estimates from Dublin; Santorini is about 4h 15m.
Warm in May
25°C average high
avg high · 16° at night
25°C+ on 5 in 10 days
Hot in May
29°C average high
avg high · 16° at night
25°C+ on 8 in 10 days
Air: Copernicus ERA5-Land, 2011–2025, matched to the official averages for Santorini airport. Sea: Copernicus ERA5, 2022–2025. Rainy days = days with 1 mm of rain or more, as weather stations count them. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology