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Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
78°F
26°C
| Humidity | 58% |
| Wind Speed | SE 10 mph |
| Barometer | 29.97 in (1014.7 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 11 Jul 3:56 pm EDT |
Extended Forecast for
North Great River NY
Tonight
Low: 66 °F
Partly Cloudy
Sunday
High: 82 °F
Sunny
Sunday Night
Low: 67 °F
Mostly Clear
Monday
High: 83 °F
Sunny
Monday Night
Low: 69 °F
Mostly Clear
Tuesday
High: 89 °F
Sunny
Tuesday Night
Low: 76 °F
Mostly Clear
Wednesday
High: 93 °F
Sunny
Wednesday Night
Low: 73 °F
Partly Cloudy
Detailed Forecast
Tonight
Partly cloudy, with a low around 66. Northeast wind 3 to 8 mph.
Sunday
Sunny, with a high near 82. Northeast wind around 7 mph becoming southeast in the afternoon.
Sunday Night
Mostly clear, with a low around 67. South wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 83. Light southwest wind becoming south 6 to 11 mph in the afternoon.
Monday Night
Mostly clear, with a low around 69. Southwest wind 7 to 9 mph.
Tuesday
Sunny, with a high near 89.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Partly cloudy, with a low around 73.
Thursday
Sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 73.
Friday
Mostly sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 71.
Saturday
Mostly sunny, with a high near 83.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
North Great River NY
40.74°N 73.16°W (Elev. 7 ft)
40.74°N 73.16°W (Elev. 7 ft)
4:14 pm EDT Jul 11, 2026
4pm EDT Jul 11, 2026-6pm EDT Jul 18, 2026
Additional Resources
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Hourly Weather Forecast
