Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
43°F
6°C
| Humidity | 80% |
| Wind Speed | NW 15 mph |
| Barometer | 29.64 in (1003.9 mb) |
| Dewpoint | 37°F (3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 36°F (2°C) |
| Last update | 13 Nov 4:56 pm EST |
Extended Forecast for
Great River NY
Tonight
Low: 37 °F
Cloudy
Saturday
High: 47 °F
Partly Sunny
Saturday Night
Low: 41 °F
Decreasing
CloudsSunday
High: 49 °F
Sunny
Sunday Night
Low: 41 °F
Mostly Clear
Monday
High: 51 °F
Sunny
Monday Night
Low: 40 °F
Mostly Clear
Tuesday
High: 54 °F
Sunny
Tuesday Night
Low: 43 °F
Clear
Detailed Forecast
Tonight
Cloudy, with a low around 37. North wind 14 to 17 mph.
Saturday
Partly sunny, with a high near 47. Northwest wind 14 to 16 mph.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 41. Northwest wind around 17 mph.
Sunday
Sunny, with a high near 49. Northwest wind around 17 mph.
Sunday Night
Mostly clear, with a low around 41. Northwest wind 11 to 15 mph.
Monday
Sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 54.
Tuesday Night
Clear, with a low around 43.
Wednesday
Sunny, with a high near 58.
Wednesday Night
Clear, with a low around 45.
Thursday
Sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 59.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Great River NY
40.7°N 73.14°W (Elev. 0 ft)
40.7°N 73.14°W (Elev. 0 ft)
1:17 pm EST Nov 13, 2026
5pm EST Nov 13, 2026-6pm EST Nov 20, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
