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.

Mostly Cloudy and Breezy

27°F

-3°C

Humidity 58%
Wind Speed NW 22 G 37 mph
Barometer 29.63 in (1003.6 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 1 Jan 8:56 am EST
Extended Forecast for

Islip NY

  • New Year's Day

    New Year's Day: Sunny, with a high near 34. Wind chill values between 15 and 20. Northwest wind 15 to 18 mph, with gusts as high as 33 mph.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 18. Wind chill values between 10 and 15. West wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 18 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 8 to 13 mph.

    High: 31 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 20. West wind around 8 mph.

    Low: 20 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 33. West wind 6 to 9 mph.

    High: 33 °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 34.

    High: 34 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 19.

    Low: 19 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

Detailed Forecast

New Year's Day
Sunny, with a high near 34. Wind chill values between 15 and 20. Northwest wind 15 to 18 mph, with gusts as high as 33 mph.
Tonight
Increasing clouds, with a low around 18. Wind chill values between 10 and 15. West wind 8 to 11 mph, with gusts as high as 22 mph.
Friday
Partly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 8 to 13 mph.
Friday Night
Partly cloudy, with a low around 20. West wind around 8 mph.
Saturday
Increasing clouds, with a high near 33. West wind 6 to 9 mph.
Saturday Night
Cloudy, with a low around 24.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 19.
Monday
Partly sunny, with a high near 32.
Monday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
12:54 am EST Jan 1, 2026
Forecast Valid:
9am EST Jan 1, 2026-6pm EST Jan 7, 2026
 
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Additional Resources

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Chance of Precipitation