Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
42°F
6°C
| Humidity | 68% |
| Wind Speed | W 9 mph |
| Barometer | 29.84 in (1010.5 mb) |
| Dewpoint | 32°F (0°C) |
| Visibility | 10.00 mi |
| Wind Chill | 37°F (3°C) |
| Last update | 14 Nov 8:56 pm EST |
Extended Forecast for
Great River NY
Tonight
Low: 36 °F
Isolated
Showers then
Partly CloudySunday
High: 51 °F
Sunny
Sunday Night
Low: 35 °F
Partly Cloudy
Monday
High: 51 °F
Sunny
Monday Night
Low: 36 °F
Clear
Tuesday
High: 55 °F
Sunny
Tuesday Night
Low: 41 °F
Clear
Wednesday
High: 59 °F
Sunny
Wednesday Night
Low: 43 °F
Mostly Clear
Detailed Forecast
Tonight
Isolated showers before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. West wind 10 to 13 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 51. Northwest wind 9 to 17 mph.
Sunday Night
Partly cloudy, with a low around 35. North wind 7 to 9 mph.
Monday
Sunny, with a high near 51. North wind 7 to 10 mph.
Monday Night
Clear, with a low around 36. Northwest wind around 6 mph.
Tuesday
Sunny, with a high near 55.
Tuesday Night
Clear, with a low around 41.
Wednesday
Sunny, with a high near 59.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 45.
Saturday
Mostly sunny, with a high near 60.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Great River NY
40.72°N 73.16°W (Elev. 13 ft)
40.72°N 73.16°W (Elev. 13 ft)
7:16 pm EST Nov 14, 2026
9pm EST Nov 14, 2026-6pm EST Nov 21, 2026
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