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 Windy

13°F

-11°C

Humidity 42%
Wind Speed NW 26 G 37 mph
Barometer 30.07 in (1018.5 mb)
Dewpoint -6°F (-21°C)
Visibility 10.00 mi
Wind Chill-7°F (-22°C)
Last update 8 Feb 12:56 pm EST
Extended Forecast for

2 Miles NNW Stony Brook NY

Cold Weather Advisory until February 9, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory until February 9, 10:00am

    NOW until 10:00am Mon

    Cold Weather Advisory

  • This Afternoon

    High: 17 °F

    Cold

  • Tonight

    Tonight: Mostly clear, with a low around 10. Wind chill values between -5 and zero. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.

    Low: 10 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 28. Wind chill values between -5 and 5. Northwest wind 8 to 13 mph.

    High: 28 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 19. Northwest wind 3 to 6 mph.

    Low: 19 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A chance of snow after 1pm, mixing with rain after 4pm. Mostly cloudy, with a high near 36. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 36 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain and snow before 10pm, then a chance of snow between 10pm and 1am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 32. Chance of precipitation is 30%.

    Low: 32 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Sunny and cold, with a high near 17. Wind chill values between -5 and zero. Northwest wind around 18 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 10. Wind chill values between -5 and zero. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 28. Wind chill values between -5 and 5. Northwest wind 8 to 13 mph.
Monday Night
Increasing clouds, with a low around 19. Northwest wind 3 to 6 mph.
Tuesday
A chance of snow after 1pm, mixing with rain after 4pm. Mostly cloudy, with a high near 36. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%.
Tuesday Night
A chance of rain and snow before 10pm, then a chance of snow between 10pm and 1am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 32. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Partly cloudy, with a low around 24.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Sunny, with a high near 34.
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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:
12:55 pm EST Feb 8, 2026
Forecast Valid:
1pm EST Feb 8, 2026-6pm EST Feb 14, 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