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.

A Few Clouds and Windy

27°F

-3°C

Humidity 53%
Wind Speed NW 26 G 40 mph
Barometer 29.72 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 1 Jan 12:56 pm EST
Extended Forecast for

Islip NYSimilar City Names

  • New Year's Day

    New Year's Day: Sunny, with a high near 36. Wind chill values between 10 and 15. Breezy, with a northwest wind 20 to 23 mph, with gusts as high as 34 mph.

    High: 36 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: A chance of flurries after 1am. Increasing clouds, with a steady temperature around 22. Wind chill values between 10 and 15. West wind 7 to 13 mph.

    Low: 22 °F

    Chance
    Flurries

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 9 to 11 mph.

    High: 31 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 20. Wind chill values between 10 and 15. West wind around 9 mph.

    Low: 20 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 31. West wind 7 to 9 mph.

    High: 31 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Cloudy, with a low around 24.

    Low: 24 °F

    Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 33.

    High: 33 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

Detailed Forecast

New Year's Day
Sunny, with a high near 36. Wind chill values between 10 and 15. Breezy, with a northwest wind 20 to 23 mph, with gusts as high as 34 mph.
Tonight
A chance of flurries after 1am. Increasing clouds, with a steady temperature around 22. Wind chill values between 10 and 15. West wind 7 to 13 mph.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 9 to 11 mph.
Friday Night
Partly cloudy, with a low around 20. Wind chill values between 10 and 15. West wind around 9 mph.
Saturday
Increasing clouds, with a high near 31. West wind 7 to 9 mph.
Saturday Night
Cloudy, with a low around 24.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 20.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
Mostly cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip NYSimilar City Names
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
12:21 pm EST Jan 1, 2026
Forecast Valid:
1pm EST Jan 1, 2026-6pm EST Jan 7, 2026
 
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Additional Resources

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