National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast and Breezy

22°F

-6°C

Humidity 57%
Wind Speed NW 22 G 33 mph
Barometer 29.81 in (1009.5 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 26 Jan 6:56 pm EST
Extended Forecast for

Islip NY

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 11. Wind chill values between zero and 10. Northwest wind 11 to 14 mph, with gusts as high as 28 mph.

    Low: 11 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: A chance of flurries after noon. Increasing clouds, with a high near 22. Wind chill values between -5 and 5. West wind 10 to 14 mph, with gusts as high as 24 mph.

    High: 22 °F

    Chance
    Flurries

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 11. Wind chill values between zero and 5. West wind around 11 mph, with gusts as high as 24 mph.

    Low: 11 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 23. Wind chill values between zero and 10. West wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 23 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 10. West wind around 7 mph.

    Low: 10 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 7.

    Low: 7 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and cold, with a high near 20.

    High: 20 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around 7.

    Low: 7 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 11. Wind chill values between zero and 10. Northwest wind 11 to 14 mph, with gusts as high as 28 mph.
Tuesday
A chance of flurries after noon. Increasing clouds, with a high near 22. Wind chill values between -5 and 5. West wind 10 to 14 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 11. Wind chill values between zero and 5. West wind around 11 mph, with gusts as high as 24 mph.
Wednesday
Mostly sunny, with a high near 23. Wind chill values between zero and 10. West wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 10. West wind around 7 mph.
Thursday
Mostly sunny, with a high near 22.
Thursday Night
Mostly clear, with a low around 7.
Friday
Mostly sunny and cold, with a high near 20.
Friday Night
Partly cloudy, with a low around 7.
Saturday
Mostly sunny, with a high near 24.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 14.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 18.
Monday
Mostly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
6:03 pm EST Jan 26, 2026
Forecast Valid:
8pm EST Jan 26, 2026-6pm EST Feb 2, 2026
 
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Additional Resources

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