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

18°F

-8°C

Humidity 45%
Wind Speed W 10 mph
Barometer 30.09 in (1019.1 mb)
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 29 Jan 8:56 pm EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Cold Weather Advisory January 30, 12:00am until January 30, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 4. Wind chill values between -10 and zero. Northwest wind around 8 mph, with gusts as high as 20 mph.

    Low: 4 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and cold, with a high near 16. Wind chill values between -10 and zero. West wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 16 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around 5. Wind chill values between zero and 5. Northwest wind 3 to 6 mph.

    Low: 5 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 20. Wind chill values between zero and 10. North wind 3 to 8 mph.

    High: 20 °F

    Cold

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 12. North wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 30 mph.

    Low: 12 °F

    Chance Snow

  • Sunday

    Sunday: A 50 percent chance of snow. Cloudy, with a high near 24. Blustery.

    High: 24 °F

    Chance Snow
    and Blustery

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 16.

    Low: 16 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 4. Wind chill values between -10 and zero. Northwest wind around 8 mph, with gusts as high as 20 mph.
Friday
Mostly sunny and cold, with a high near 16. Wind chill values between -10 and zero. West wind 8 to 11 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 5. Wind chill values between zero and 5. Northwest wind 3 to 6 mph.
Saturday
Partly sunny and cold, with a high near 20. Wind chill values between zero and 10. North wind 3 to 8 mph.
Saturday Night
A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 12. North wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 30 mph.
Sunday
A 50 percent chance of snow. Cloudy, with a high near 24. Blustery.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Mostly sunny, with a high near 31.
Monday Night
Mostly clear, with a low around 16.
Tuesday
Mostly sunny, with a high near 33.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 30.
Wednesday Night
Partly cloudy, with a low around 16.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 30.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
1:13 pm EST Jan 29, 2026
Forecast Valid:
9pm EST Jan 29, 2026-6pm EST Feb 5, 2026
 
Forecast Discussion
 
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Additional Resources

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