Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Partly Cloudy
29°F
-2°C
| Humidity | 47% |
| Wind Speed | W 15 G 26 mph |
| Barometer | 29.85 in (1011.0 mb) |
| Dewpoint | 11°F (-12°C) |
| Visibility | 10.00 mi |
| Wind Chill | 18°F (-8°C) |
| Last update | 24 Feb 12:56 pm EST |
Extended Forecast for
North Great River NY
This Afternoon
High: 33 °F
Partly Sunny
Tonight
Low: 22 °F⇑
Mostly Clear
then
Rain/Snow
LikelyWednesday
High: 40 °F
Rain/Snow
then Chance
Rain/SnowWednesday Night
Low: 29 °F
Partly Cloudy
Thursday
High: 37 °F
Mostly Sunny
then Chance
SnowThursday Night
Low: 26 °F
Chance Snow
Friday
High: 37 °F
Mostly Sunny
Friday Night
Low: 28 °F
Partly Cloudy
Saturday
High: 43 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Sunny early, then becoming partly sunny, with a high near 33. Wind chill values between 20 and 25. Northwest wind 14 to 16 mph, with gusts as high as 26 mph.
Tonight
Rain likely between 4am and 5am, then snow likely after 5am. Increasing clouds, with a temperature falling to near 22 by 11pm, then rising to around 33 during the remainder of the night. Wind chill values between 15 and 20. West wind 6 to 9 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday
Rain and snow, mainly before 1pm. High near 40. Southwest wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday Night
Partly cloudy, with a low around 29. Southwest wind around 6 mph.
Thursday
A 30 percent chance of snow, mainly after 4pm. Partly sunny, with a high near 37. West wind 3 to 6 mph.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 26.
Friday
Mostly sunny, with a high near 37.
Friday Night
Partly cloudy, with a low around 28.
Saturday
Mostly sunny, with a high near 43.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 20.
Monday
A 40 percent chance of snow. Partly sunny, with a high near 30.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
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)
1:21 pm EST Feb 24, 2026
1pm EST Feb 24, 2026-6pm EST Mar 2, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
