18.03
wed
wed
Day
34°F
S 8 mph
Precip.
0%
0%
Night
30°F
N 6 mph
Precip.
0%
0%
19.03
thu
thu
Day
37°F
N 7 mph
Precip.
0%
0%
Night
37°F
NE 7 mph
Precip.
0%
0%
20.03
fri
fri
Day
43°F
N 6 mph
Precip.
0%
0%
Night
43°F
N 15 mph
Precip.
100%
100%
21.03
sat
sat
Day
54°F
SW 9 mph
Precip.
0%
0%
Night
43°F
W 3 mph
Precip.
88%
88%
22.03
sun
sun
Day
50°F
NE 9 mph
Precip.
0%
0%
Night
46°F
S 2 mph
Precip.
0%
0%
23.03
mon
mon
Day
36°F
SW 15 mph
Precip.
100%
100%
Night
34°F
S 10 mph
Precip.
0%
0%
24.03
tue
tue
Day
36°F
S 9 mph
Precip.
0%
0%
Night
36°F
SE 3 mph
Precip.
0%
0%
25.03
wed
wed
Day
45°F
E 13 mph
Precip.
0%
0%
Night
39°F
E 7 mph
Precip.
0%
0%
26.03
thu
thu
Day
43°F
NW 12 mph
Precip.
0%
0%
Night
48°F
NE 23 mph
Precip.
0%
0%
27.03
fri
fri
Day
52°F
NE 19 mph
Precip.
0%
0%
Night
30°F
S 16 mph
Precip.
100%
100%
28.03
sat
sat
Day
25°F
S 14 mph
Precip.
100%
100%
Night
18°F
SE 16 mph
Precip.
0%
0%
29.03
sun
sun
Day
34°F
E 14 mph
Precip.
28%
28%
Night
21°F
SE 13 mph
Precip.
0%
0%
30.03
mon
mon
Day
21°F
SE 13 mph
Precip.
62%
62%
Night
19°F
SE 10 mph
Precip.
0%
0%
31.03
tue
tue
Day
27°F
SE 11 mph
Precip.
0%
0%
Night
30°F
E 4 mph
Precip.
0%
0%
sea water
temperature
temperature
| Fire Island |
monthly
weather
weather
| Fire Island |
current
weather
weather
| Fire Island |
7 days
forecast
forecast
| Fire Island |
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 37.1°F. The highest and lowest sea temperatures during the month were 41.2°F and 34.3°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 46.2°F. The highest and lowest sea temperatures during the month were 50.2°F and 43.5°F.
Air temperature in Fire Island, °F
Precipitation total in Fire Island, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Fire Island
Fire Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Fire Island
Local time: 19:00
March 18, wednesday
2100
30°F
N
6 mph
6 mph
March 19, thursday
0000
30°F
N
6 mph
6 mph
0300
30°F
NW
4 mph
4 mph
0600
28°F
NW
3 mph
3 mph
0900
32°F
NW
6 mph
6 mph
1200
37°F
N
7 mph
7 mph
1500
39°F
N
9 mph
9 mph
1800
39°F
N
8 mph
8 mph
