The highest day temperature in July 2025 was 98°F. The lowest night temperature was 72°F. The average values for day and night temperatures during July were 88.6°F и 76.1°F respectivly.

The average sea surface temperature in July 2025 for Fire Island was 78.5°F. The maximum and minimum values were 74.0°F and 82.0°F respectively.

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

Precipitation total in July for Fire Island is 1.4 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 8.3 mph. It makes July the most windless month of the year for Fire Island.

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 July is 8.6 hours.