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.

Light Snow

32°F

0°C

Humidity 66%
Wind Speed SW 10 mph
Barometer 29.71 in (1006.0 mb)
Dewpoint 22°F (-6°C)
Visibility 4.00 mi
Wind Chill24°F (-4°C)
Last update 31 Dec 10:56 pm EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Tonight

    Tonight: Light snow, mainly between 1am and 4am. Steady temperature around 33. Wind chill values between 20 and 25. Southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.

    Low: 33 °F

    Light Snow

  • New Year's Day

    New Year's Day: A 50 percent chance of snow showers before 10am. Mostly sunny, with a temperature falling to around 25 by 5pm. Wind chill values between 10 and 20. Breezy, with a northwest wind 17 to 23 mph, with gusts as high as 36 mph.

    High: 34 °F⇓

    Breezy.
    Chance Snow
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 17. Wind chill values between 5 and 10. West wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 17 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 32. Wind chill values between 5 and 15. West wind 10 to 15 mph.

    High: 32 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 22. West wind around 9 mph.

    Low: 22 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 34.

    High: 34 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Cloudy, with a low around 23.

    Low: 23 °F

    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 19 °F

    Mostly Clear

Detailed Forecast

Tonight
Light snow, mainly between 1am and 4am. Steady temperature around 33. Wind chill values between 20 and 25. Southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.
New Year's Day
A 50 percent chance of snow showers before 10am. Mostly sunny, with a temperature falling to around 25 by 5pm. Wind chill values between 10 and 20. Breezy, with a northwest wind 17 to 23 mph, with gusts as high as 36 mph.
Thursday Night
Partly cloudy, with a low around 17. Wind chill values between 5 and 10. West wind 10 to 14 mph, with gusts as high as 24 mph.
Friday
Mostly sunny, with a high near 32. Wind chill values between 5 and 15. West wind 10 to 15 mph.
Friday Night
Mostly clear, with a low around 22. West wind around 9 mph.
Saturday
Increasing clouds, with a high near 34.
Saturday Night
Cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 19.
Monday
Partly sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
Last Update:
1:50 pm EST Dec 31, 2025
Forecast Valid:
11pm EST Dec 31, 2025-6pm EST Jan 7, 2026
 
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