National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair and Breezy

14°F

-10°C

Humidity 58%
Wind Speed N 23 G 36 mph
Barometer 29.91 in (1012.9 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill-5°F (-21°C)
Last update 1 Feb 1:56 am EST
Extended Forecast for

2 Miles NNW Stony Brook NY

Cold Weather Advisory February 1, 02:41am until February 1, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory February 1, 02:41am until February 1, 10:00am

    NOW until 10:00am Sun

    Cold Weather Advisory

  • Overnight

    Low: 13 °F

    Cloudy and
    Blustery

  • Sunday

    Sunday: Mostly cloudy, with a high near 23. Wind chill values between -5 and 5. Blustery, with a north wind 20 to 25 mph, with gusts as high as 37 mph.

    High: 23 °F

    Mostly Cloudy
    and Blustery

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15. Wind chill values between zero and 5. Northwest wind 14 to 18 mph.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 31. Wind chill values between zero and 10. Northwest wind 10 to 13 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 16. Northwest wind 6 to 8 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31.

    High: 31 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

Detailed Forecast

Overnight
Cloudy, with a low around 13. Wind chill values between -5 and zero. Blustery, with a north wind around 21 mph.
Sunday
Mostly cloudy, with a high near 23. Wind chill values between -5 and 5. Blustery, with a north wind 20 to 25 mph, with gusts as high as 37 mph.
Sunday Night
Mostly cloudy, with a low around 15. Wind chill values between zero and 5. Northwest wind 14 to 18 mph.
Monday
Sunny, with a high near 31. Wind chill values between zero and 10. Northwest wind 10 to 13 mph.
Monday Night
Mostly clear, with a low around 16. Northwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 20.
Wednesday
Partly sunny, with a high near 31.
Wednesday Night
Partly cloudy, with a low around 15.
Thursday
Sunny, with a high near 29.
Thursday Night
Partly cloudy, with a low around 15.
Friday
A 30 percent chance of snow. Mostly cloudy, with a high near 31.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 16.
Saturday
Mostly sunny, with a high near 23. Blustery.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
Last Update:
1:11 am EST Feb 1, 2026
Forecast Valid:
2am EST Feb 1, 2026-6pm EST Feb 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation