Weather in Fire Island: August
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Average day temperature: | 79.7°F |
| Average night temperature: | 72.3°F | |
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Sea water temperature: | 76.2°F |
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Number of sunny days: | 12 days |
| Day length: | 13.1 - 14.3 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
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forecast
| Fire Island |
temperature
| Fire Island |
Air temperature in August, °F
The highest day temperature during August of 2025 was 89°F. At the same time the lowest night temperature was 60°F. Daily and nightly averages during August were 80.3°F and 67.9°F.
Sea water temperature in Fire Island in August, °F
The average sea water temperature in August of 2025 was 73.8°F. The highest and lowest sea temperatures during the month were 78.4°F and 69.6°F.
Number of sunny, partly cloudy and cloudy days in August is almost equal.
Precipitation total in August, in.
Precipitation total value in Fire Island in August is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in August is 8.6 mph It makes August one of the least windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 8.2.
Best time for vacation in Fire Island
Fire Island on a weather map
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