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.

A Few Clouds

17°F

-8°C

Humidity 51%
Wind Speed W 8 mph
Barometer 29.99 in (1015.7 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 27 Jan 8:56 pm EST
Extended Forecast for

2 Miles NNW Stony Brook NY

  • Tonight

    Tonight: Mostly clear, with a low around 15. Wind chill values between zero and 5. West wind around 14 mph.

    Low: 15 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 24. Wind chill values between zero and 10. West wind 7 to 10 mph.

    High: 24 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 12. Wind chill values between zero and 5. West wind around 8 mph.

    Low: 12 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 22. Wind chill values between zero and 10. West wind 9 to 11 mph.

    High: 22 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 10. Northwest wind 10 to 13 mph.

    Low: 10 °F

    Mostly Clear

  • Friday

    Friday: Sunny and cold, with a high near 20.

    High: 20 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around 6.

    Low: 6 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 22.

    High: 22 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 16. Blustery.

    Low: 16 °F

    Chance Snow
    and Blustery

Detailed Forecast

Tonight
Mostly clear, with a low around 15. Wind chill values between zero and 5. West wind around 14 mph.
Wednesday
Increasing clouds, with a high near 24. Wind chill values between zero and 10. West wind 7 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 12. Wind chill values between zero and 5. West wind around 8 mph.
Thursday
Sunny, with a high near 22. Wind chill values between zero and 10. West wind 9 to 11 mph.
Thursday Night
Mostly clear, with a low around 10. Northwest wind 10 to 13 mph.
Friday
Sunny and cold, with a high near 20.
Friday Night
Partly cloudy, with a low around 6.
Saturday
Partly sunny, with a high near 22.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 16. Blustery.
Sunday
A 50 percent chance of snow. Mostly cloudy, with a high near 28. Blustery.
Sunday Night
Mostly cloudy, with a low around 19. Blustery.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 32.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
Last Update:
12:48 pm EST Jan 27, 2026
Forecast Valid:
9pm EST Jan 27, 2026-6pm EST Feb 3, 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