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

43°F

6°C

Humidity 37%
Wind Speed W 20 G 30 mph
Barometer 29.33 in (993.3 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 29 Dec 6:56 pm EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

Wind Advisory until December 30, 06:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until December 30, 06:00pm

    NOW until 6:00pm Tue

    Wind Advisory

  • Tonight

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 33. Wind chill values between 15 and 20. West wind 16 to 18 mph, with gusts as high as 47 mph.

    High: 33 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind 10 to 14 mph, with gusts as high as 33 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 35. Wind chill values between 15 and 25. West wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 35 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 22. Southwest wind around 9 mph, with gusts as high as 24 mph.

    Low: 22 °F

    Chance Snow

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 25. Wind chill values between 15 and 20. West wind 14 to 17 mph, with gusts as high as 44 mph.
Tuesday
Partly sunny, with a high near 33. Wind chill values between 15 and 20. West wind 16 to 18 mph, with gusts as high as 47 mph.
Tuesday Night
Mostly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind 10 to 14 mph, with gusts as high as 33 mph.
Wednesday
Partly sunny, with a high near 35. Wind chill values between 15 and 25. West wind 10 to 14 mph, with gusts as high as 25 mph.
Wednesday Night
A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 22. Southwest wind around 9 mph, with gusts as high as 24 mph.
New Year's Day
Mostly sunny, with a high near 31.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 35.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Mostly cloudy, with a low around 22.
Monday
Mostly cloudy, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
Last Update:
3:54 pm EST Dec 29, 2025
Forecast Valid:
7pm EST Dec 29, 2025-6pm EST Jan 5, 2026
 
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Additional Resources

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Chance of Precipitation