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

29°F

-2°C

Humidity 39%
Wind Speed W 13 G 26 mph
Barometer 29.75 in (1007.4 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 30 Dec 9:56 pm EST
Extended Forecast for

East Islip NY

  • Tonight

    Tonight: 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 29 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.

    High: 35 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Snow likely, mainly after 1am. Increasing clouds, with a low around 24. Southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 24 °F

    Chance Snow
    then Snow
    Likely

  • New Year's Day

    New Year's Day: A 20 percent chance of snow before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 32. Wind chill values between 15 and 20. Northwest wind 11 to 15 mph, with gusts as high as 28 mph.

    High: 32 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18. West wind 8 to 10 mph, with gusts as high as 24 mph.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

Detailed Forecast

Tonight
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 29 mph.
Wednesday
Partly sunny, with a high near 35. Wind chill values between 15 and 25. West wind 10 to 14 mph.
Wednesday Night
Snow likely, mainly after 1am. Increasing clouds, with a low around 24. Southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
New Year's Day
A 20 percent chance of snow before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 32. Wind chill values between 15 and 20. Northwest wind 11 to 15 mph, with gusts as high as 28 mph.
Thursday Night
Partly cloudy, with a low around 18. West wind 8 to 10 mph, with gusts as high as 24 mph.
Friday
Partly sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 33.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 33.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Islip NY
 40.73°N 73.19°W (Elev. 16 ft)
Last Update:
7:32 pm EST Dec 30, 2025
Forecast Valid:
11pm EST Dec 30, 2025-6pm EST Jan 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation