Measurements:
°C
°F
CURRENT WEATHER
05:58
Fire Island
10°F
SE 15 mph
Feels like: -4°F
Precip: 0%
World Resorts USA Fire Island Weather

7 Day Weather Forecast

12.15
mon
DAY
24°F
SE 13 mph
precip
0%
NIGHT
24°F
E 13 mph
precip
0%
12.16
tue
DAY
28°F
E 7 mph
precip
0%
NIGHT
32°F
NE 12 mph
precip
0%
12.17
wed
DAY
40°F
NE 15 mph
precip
0%
NIGHT
34°F
E 9 mph
precip
0%
12.18
thu
DAY
42°F
N 4 mph
precip
0%
NIGHT
54°F
N 22 mph
precip
100%
12.19
fri
DAY
48°F
E 17 mph
precip
21%
NIGHT
30°F
SE 18 mph
precip
0%
12.20
sat
DAY
30°F
E 3 mph
precip
0%
NIGHT
40°F
N 16 mph
precip
0%
12.21
sun
DAY
48°F
NE 14 mph
precip
0%
NIGHT
40°F
SE 15 mph
precip
0%

Fire Island Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for Fire Island was 8.5°F. The maximum and minimum values were 6.9°F and 10.6°F respectively.

Fire Island on the Weather Map

Best Time to Visit Fire Island
The most sunny months:
November 16 days
September 15 days
October 14 days
The most warm months:
July 84.9 °F
August 83.0 °F
June 76.9 °F
Warmest sea temperature:
July 79.8 °F
August 78.9 °F
September 74.6 °F
The most cold months:
January 36.6 °F
February 37.6 °F
December 42.5 °F
The most rainy months:
December 3 days
March 3 days
April 3 days
The most windy months:
March 12 mph
January 11 mph
November 11 mph
more details