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 43%
Wind Speed NW 17 G 29 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 2 Feb 12:56 pm EST
Extended Forecast for

East Setauket NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 30. Wind chill values between 15 and 20. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.

    High: 30 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 16. Northwest wind 3 to 8 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 3 to 7 mph.

    High: 31 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 22. Southwest wind around 6 mph becoming calm after midnight.

    Low: 22 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 31. Northwest wind 3 to 8 mph.

    High: 31 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 30.

    High: 30 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

This Afternoon
Sunny, with a high near 30. Wind chill values between 15 and 20. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 16. Northwest wind 3 to 8 mph.
Tuesday
Mostly sunny, with a high near 31. Wind chill values between 10 and 20. West wind 3 to 7 mph.
Tuesday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 22. Southwest wind around 6 mph becoming calm after midnight.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 31. Northwest wind 3 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 14.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Partly cloudy, with a low around 14.
Friday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 30.
Friday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 10.
Saturday
Mostly sunny and cold, with a high near 18. Blustery.
Saturday Night
Partly cloudy, with a low around 5. Blustery.
Sunday
Mostly sunny and cold, with a high near 19.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NY
 40.94°N 73.11°W (Elev. 52 ft)
Last Update:
10:58 am EST Feb 2, 2026
Forecast Valid:
1pm EST Feb 2, 2026-6pm EST Feb 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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