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

15°F

-9°C

Humidity 42%
Wind Speed W 18 mph
Barometer 30.09 in (1019.1 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-2°F (-19°C)
Last update 30 Jan 1:56 pm EST
Extended Forecast for

Islip Terrace NY

Cold Weather Advisory January 30, 02:21pm until January 31, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory January 30, 02:21pm until January 31, 10:00am

    NOW until 10:00am Sat

    Cold Weather Advisory

  • This Afternoon

    High: 18 °F

    Cold

  • Tonight

    Tonight: Mostly clear, with a low around 4. Wind chill values between -5 and zero. West wind 5 to 11 mph.

    Low: 4 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 23. Wind chill values between -5 and 5. North wind 5 to 7 mph.

    High: 23 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 13. Wind chill values between zero and 10. North wind 8 to 16 mph, with gusts as high as 32 mph.

    Low: 13 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow. Cloudy, with a high near 26. Blustery, with a north wind 17 to 21 mph, with gusts as high as 37 mph.

    High: 26 °F

    Slight Chance
    Snow and
    Blustery

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °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 15.

    Low: 15 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny and cold, with a high near 18. Wind chill values between zero and 5. West wind around 18 mph.
Tonight
Mostly clear, with a low around 4. Wind chill values between -5 and zero. West wind 5 to 11 mph.
Saturday
Increasing clouds, with a high near 23. Wind chill values between -5 and 5. North wind 5 to 7 mph.
Saturday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 13. Wind chill values between zero and 10. North wind 8 to 16 mph, with gusts as high as 32 mph.
Sunday
A 20 percent chance of snow. Cloudy, with a high near 26. Blustery, with a north wind 17 to 21 mph, with gusts as high as 37 mph.
Sunday Night
Mostly cloudy, with a low around 15.
Monday
Mostly sunny, with a high near 31.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Sunny, with a high near 32.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Partly sunny, with a high near 31.
Wednesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 17.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
1:28 pm EST Jan 30, 2026
Forecast Valid:
2pm EST Jan 30, 2026-6pm EST Feb 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation