Current sea water temperature:
+48.2°F
| Minimum sea water temperature in April: | 55.9°F |
| Maximum sea water temperature in April: | 41.0°F |
| Average sea water temperature in April: | 47.6°F |
| more information | |
14 days
forecast
forecast
| Fire Island |
monthly
weather
weather
| Fire Island |
Sea water temperature for the last 10 days:
| April 29 | 48.2°F | April 24 | 47.8°F |
| April 28 | 48.6°F | April 23 | 47.7°F |
| April 27 | 47.8°F | April 22 | 48.9°F |
| April 26 | 49.6°F | April 21 | 48.4°F |
| April 25 | 49.1°F | April 20 | 48.7°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
May
May
| 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: 08:28
April 29, wednesday
0900
54°F
N
5 mph
5 mph
1200
59°F
NW
8 mph
8 mph
1500
54°F
N
8 mph
8 mph
1800
52°F
N
7 mph
7 mph
2100
52°F
N
8 mph
8 mph
April 30, thursday
0000
50°F
N
9 mph
9 mph
0300
48°F
NW
11 mph
11 mph
0600
50°F
NW
6 mph
6 mph
