Current sea water temperature:
+73.6°F
| Minimum sea water temperature in July: | 83.7°F |
| Maximum sea water temperature in July: | 70.0°F |
| Average sea water temperature in July: | 76.6°F |
| more information | |
14 days
forecast
forecast
| Fire Island |
monthly
weather
weather
| Fire Island |
Sea water temperature for the last 10 days:
| July 21 | 73.6°F | July 16 | 74.5°F |
| July 20 | 73.2°F | July 15 | 73.2°F |
| July 19 | 75.0°F | July 14 | 74.5°F |
| July 18 | 75.4°F | July 13 | 74.1°F |
| July 17 | 74.5°F | July 12 | 71.6°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 74.8°F. The highest and lowest sea temperatures during the month were 81.5°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
July
July
| 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: 09:27
July 21, tuesday
1200
77°F
NW
14 mph
14 mph
1500
77°F
NW
15 mph
15 mph
1800
72°F
N
13 mph
13 mph
2100
68°F
W
2 mph
2 mph
July 22, wednesday
0000
72°F
N
11 mph
11 mph
0300
72°F
NE
11 mph
11 mph
0600
72°F
NE
11 mph
11 mph
0900
77°F
NE
11 mph
11 mph
