Current sea water temperature:
+73.2°F
| Minimum sea water temperature in September: | 80.4°F |
| Maximum sea water temperature in September: | 62.4°F |
| Average sea water temperature in September: | 72.3°F |
| more information | |
14 days
forecast
forecast
| Fire Island |
monthly
weather
weather
| Fire Island |
Sea water temperature for the last 10 days:
| September 19 | 73.2°F | September 14 | 74.3°F |
| September 18 | 72.3°F | September 13 | 73.6°F |
| September 17 | 71.2°F | September 12 | 74.1°F |
| September 16 | 71.1°F | September 11 | 72.9°F |
| September 15 | 72.5°F | September 10 | 73.6°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 74.5°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 76.4°F. The highest and lowest sea temperatures during the month were 80.1°F and 73.4°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 73.6°F. The highest and lowest sea temperatures during the month were 75.6°F and 71.1°F.
current
weather
weather
| Fire Island |
weather in
September
September
| 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: 06:11
September 19, saturday
0900
63°F
SW
11 mph
11 mph
1200
68°F
SW
7 mph
7 mph
1500
70°F
NW
7 mph
7 mph
1800
64°F
NW
9 mph
9 mph
2100
63°F
NW
7 mph
7 mph
September 20, sunday
0000
63°F
NW
7 mph
7 mph
0300
61°F
NW
6 mph
6 mph
0600
63°F
NW
6 mph
6 mph
