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

28°F

-2°C

Humidity 51%
Wind Speed W 14 G 25 mph
Barometer 29.87 in (1011.6 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 24 Feb 11:56 am EST
Extended Forecast for

East Setauket NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 32. Wind chill values between 20 and 25. West wind around 17 mph, with gusts as high as 28 mph.

    High: 32 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow likely after 4am. Increasing clouds, with a temperature falling to near 20 by 11pm, then rising to around 31 during the remainder of the night. Wind chill values between 15 and 20. West wind 6 to 11 mph becoming light and variable. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 20 °F⇑

    Mostly Clear
    then Snow
    Likely

  • Wednesday

    Wednesday: Snow, mainly before 10am. High near 39. Wind chill values between 25 and 30. Southwest wind 10 to 13 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Snow then
    Chance Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 30. West wind 7 to 9 mph.

    Low: 30 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain and snow after 1pm. Partly sunny, with a high near 37. West wind around 7 mph. Chance of precipitation is 50%.

    High: 37 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Snow Likely

  • Friday

    Friday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 32. Wind chill values between 20 and 25. West wind around 17 mph, with gusts as high as 28 mph.
Tonight
Snow likely after 4am. Increasing clouds, with a temperature falling to near 20 by 11pm, then rising to around 31 during the remainder of the night. Wind chill values between 15 and 20. West wind 6 to 11 mph becoming light and variable. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday
Snow, mainly before 10am. High near 39. Wind chill values between 25 and 30. Southwest wind 10 to 13 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday Night
Partly cloudy, with a low around 30. West wind 7 to 9 mph.
Thursday
A chance of rain and snow after 1pm. Partly sunny, with a high near 37. West wind around 7 mph. Chance of precipitation is 50%.
Thursday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Mostly sunny, with a high near 36.
Friday Night
Mostly clear, with a low around 27.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Mostly sunny, with a high near 38.
Sunday Night
Partly cloudy, with a low around 18.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NY
 40.94°N 73.11°W (Elev. 52 ft)
Last Update:
10:52 am EST Feb 24, 2026
Forecast Valid:
12pm EST Feb 24, 2026-6pm EST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation