The highest day temperature in May 2025 was 72°F. The lowest night temperature was 59°F. The average values for day and night temperatures during May were 65.4°F и 65.2°F respectivly.

The average sea surface temperature in May 2025 for Santorini was 68.2°F. The maximum and minimum values were 65.2°F and 70.8°F respectively.

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation total in May for Santorini is 0.3 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 12.7 mph. It makes May the most windless month of the year for Santorini.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Santorini in May is 12.0 hours.