The highest day temperature in May 2026 was 92°F. The lowest night temperature was 41°F. The average values for day and night temperatures during May were 70.3°F и 53.9°F respectivly.

The average sea surface temperature in May 2026 for Fire Island was 53.8°F. The maximum and minimum values were 50.4°F and 57.2°F respectively.

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

Precipitation total in May for Fire Island is 0.9 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 9.8 mph.

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 Fire Island in May is 8.1 hours.