Fira, Santorini weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Fair
Best time to visit: July – September
What is the weather like in Fira, Santorini in May?
In May, Fira, Santorini is mild: daytime highs average 20 °C, and nights cool down to about 16 °C. The sea averages 19.0 °C – bracing, so a wetsuit helps for longer swims. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. It is often windy, with gusts of around 28 km/h. All in all, May is a so-so month for a holiday in Fira, Santorini.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 14 h 5 min06:12 – 20:17
- UV index
- 10 · very highclear sky, noon (estimate)
- Muggy days
- 2 daysdew point 18 °C or more
- Wind
- 28 km/haverage daily peak
- Cloud cover
- 25 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 35 %8 %
- Seaweight 25 %29 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in May
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- Windproof jacket
Fira, Santorini in May: quick answers
Is Fira, Santorini hot in May?
No. In May, Fira, Santorini is mild: daytime highs average 20 °C and nights drop to about 16 °C.
Can you swim in Fira, Santorini in May?
Only if you don't mind cold water: in May the sea averages just 19.0 °C. Comfortable swimming is possible from June to October.
Does it rain much in Fira, Santorini in May?
It hardly ever rains.
Fira, Santorini month by month
The whole year in Fira, SantoriniAll destinations: Greece
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)