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.

Partly Cloudy and Breezy

45°F

7°C

Humidity 46%
Wind Speed N 23 G 37 mph
Barometer 30.11 in (1019.5 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 24 Dec 1:56 pm EST
Extended Forecast for

East Setauket NY

Winter Storm Watch December 26, 04:00pm until December 27, 01:00pm
Click here for hazard details and duration
Winter Storm Watch

  • This Afternoon

    This Afternoon: Sunny, with a high near 44. Breezy, with a north wind 18 to 22 mph.

    High: 44 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Increasing clouds, with a low around 31. Wind chill values between 25 and 30. North wind 5 to 10 mph becoming light and variable.

    Low: 31 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: Partly sunny, with a high near 44. Wind chill values between 25 and 35. Southwest wind 10 to 16 mph becoming northwest in the afternoon.

    High: 44 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22. Wind chill values between 10 and 20. Blustery, with a north wind 16 to 22 mph.

    Low: 22 °F

    Partly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Friday

    Friday: A 30 percent chance of snow after 1pm. Increasing clouds, with a high near 30. North wind 6 to 14 mph becoming northeast in the afternoon.

    High: 30 °F

    Partly Sunny
    then Chance
    Snow

  • Friday Night

    Friday Night: Snow. Low around 25. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

    Low: 25 °F

    Snow

  • Saturday

    Saturday: A 50 percent chance of snow before 1pm. Mostly cloudy, with a high near 33.

    High: 33 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 44. Breezy, with a north wind 18 to 22 mph.
Tonight
Increasing clouds, with a low around 31. Wind chill values between 25 and 30. North wind 5 to 10 mph becoming light and variable.
Christmas Day
Partly sunny, with a high near 44. Wind chill values between 25 and 35. Southwest wind 10 to 16 mph becoming northwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 22. Wind chill values between 10 and 20. Blustery, with a north wind 16 to 22 mph.
Friday
A 30 percent chance of snow after 1pm. Increasing clouds, with a high near 30. North wind 6 to 14 mph becoming northeast in the afternoon.
Friday Night
Snow. Low around 25. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.
Saturday
A 50 percent chance of snow before 1pm. Mostly cloudy, with a high near 33.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 39.
Sunday Night
Rain. Low around 33. Chance of precipitation is 90%.
Monday
Rain likely. Mostly cloudy, with a high near 43. Breezy. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 26. Windy.
Tuesday
Partly sunny, with a high near 32. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NY
 40.94°N 73.14°W (Elev. 0 ft)
Last Update:
1:05 pm EST Dec 24, 2025
Forecast Valid:
2pm EST Dec 24, 2025-6pm EST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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