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

11°F

-12°C

Humidity 51%
Wind Speed N 18 mph
Barometer 30.20 in (1022.7 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-7°F (-22°C)
Last update 9 Feb 1:56 am EST
Extended Forecast for

2 Miles NNW Stony Brook NY

Cold Weather Advisory February 9, 02:42am until February 9, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory February 9, 02:42am until February 9, 10:00am

    NOW until 10:00am Mon

    Cold Weather Advisory

  • Overnight

    Low: 10 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 27. Wind chill values between zero and 10. Northwest wind 8 to 11 mph.

    High: 27 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 20. Northwest wind around 6 mph becoming calm in the evening.

    Low: 20 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow after 1pm. Increasing clouds, with a high near 35. Wind chill values between 20 and 30. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 35 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: A chance of snow, mixing with rain after 10pm, then gradually ending. Cloudy, then gradually becoming partly cloudy, with a low around 28. South wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 30%.

    Low: 28 °F

    Chance
    Rain/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

  • Thursday

    Thursday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 10. Wind chill values between -5 and zero. Northwest wind 11 to 13 mph.
Monday
Sunny, with a high near 27. Wind chill values between zero and 10. Northwest wind 8 to 11 mph.
Monday Night
Mostly cloudy, with a low around 20. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
A 20 percent chance of snow after 1pm. Increasing clouds, with a high near 35. Wind chill values between 20 and 30. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
A chance of snow, mixing with rain after 10pm, then gradually ending. Cloudy, then gradually becoming partly cloudy, with a low around 28. South wind 5 to 7 mph becoming west after midnight. 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 20.
Friday
Mostly sunny, with a high near 33.
Friday Night
Mostly clear, with a low around 21.
Saturday
Sunny, with a high near 35.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
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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:
1:31 am EST Feb 9, 2026
Forecast Valid:
2am EST Feb 9, 2026-6pm EST Feb 15, 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