Current sea water temperature:
+38.8°F
| Minimum sea water temperature in March: | 47.1°F |
| Maximum sea water temperature in March: | 34.3°F |
| Average sea water temperature in March: | 41.8°F |
| more information | |
14 days
forecast
forecast
| Fire Island |
monthly
weather
weather
| Fire Island |
Sea water temperature for the last 10 days:
| March 18 | 38.8°F | March 13 | 40.3°F |
| March 17 | 37.9°F | March 12 | 41.2°F |
| March 16 | 37.8°F | March 11 | 39.0°F |
| March 15 | 38.1°F | March 10 | 37.2°F |
| March 14 | 39.2°F | March 9 | 36.7°F |
Monthly sea water temperature, °F
When is the warmest sea in Fire Island?
Based on the data about daily sea water temperature for the last three years the warmest sea in Fire Island was noticed in July, August and September.
Monthly Sea Temperatures in Fire Island, °F
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 75.7°F. The highest and lowest sea temperatures during the month were 78.8°F and 71.6°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
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.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 70.4°F. The highest and lowest sea temperatures during the month were 72.1°F and 68.4°F.
current
weather
weather
| Fire Island |
weather in
March
March
| Fire Island |
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: 22:55
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
2100
37°F
N
7 mph
7 mph
