The highest day temperature in May 2025 was 78°F. The lowest night temperature was 62°F. The average values for day and night temperatures during May were 72.2°F и 66.1°F respectivly.

The average sea surface temperature in May 2025 for Poros was 67.9°F. The maximum and minimum values were 63.8°F and 71.4°F respectively.

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

Precipitation total in May for Poros is 0.5 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 7.2 mph. This value is relatively stable throughout the year.

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 Poros in May is 11.8 hours.