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

18°F

-8°C

Humidity 52%
Wind Speed NW 15 mph
Barometer 30.14 in (1020.6 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 28 Jan 9:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Today

    Today: Increasing clouds, with a high near 23. Wind chill values between 10 and 15. West wind 6 to 8 mph.

    High: 23 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 8. Wind chill values between zero and 5. West wind 6 to 8 mph.

    Low: 8 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 21. Wind chill values between zero and 10. Northwest wind 8 to 11 mph.

    High: 21 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 8. Wind chill values between -5 and zero. Northwest wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 8 °F

    Mostly Clear

  • Friday

    Friday: Sunny and cold, with a high near 19. West wind 7 to 11 mph.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around 4.

    Low: 4 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after 1am. Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A 50 percent chance of snow. Cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

Detailed Forecast

Today
Increasing clouds, with a high near 23. Wind chill values between 10 and 15. West wind 6 to 8 mph.
Tonight
Mostly cloudy, with a low around 8. Wind chill values between zero and 5. West wind 6 to 8 mph.
Thursday
Sunny, with a high near 21. Wind chill values between zero and 10. Northwest wind 8 to 11 mph.
Thursday Night
Mostly clear, with a low around 8. Wind chill values between -5 and zero. Northwest wind 7 to 9 mph, with gusts as high as 20 mph.
Friday
Sunny and cold, with a high near 19. West wind 7 to 11 mph.
Friday Night
Mostly clear, with a low around 4.
Saturday
Mostly sunny, with a high near 21.
Saturday Night
A 40 percent chance of snow after 1am. Mostly cloudy, with a low around 15.
Sunday
A 50 percent chance of snow. Cloudy, with a high near 27.
Sunday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
1:25 am EST Jan 28, 2026
Forecast Valid:
10am EST Jan 28, 2026-6pm EST Feb 3, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation