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.

Overcast

55°F

13°C

Humidity 90%
Wind Speed SW 17 G 30 mph
Barometer 29.70 in (1005.8 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 11 Mar 10:56 pm EDT
Extended Forecast for

East Setauket NY

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 52. Southwest wind around 14 mph. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    Showers

  • Thursday

    Thursday: Rain showers before 5pm, then a chance of rain and snow showers. Temperature falling to around 39 by 5pm. Northwest wind 13 to 16 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 51 °F⇓

    Showers then
    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. West wind 9 to 13 mph. Chance of precipitation is 30%.

    Low: 31 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Friday

    Friday: Increasing clouds, with a high near 45. West wind 5 to 15 mph becoming south in the afternoon.

    High: 45 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South wind 13 to 16 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 32.

    Low: 32 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy, with a high near 47.

    High: 47 °F

    Cloudy

  • Sunday Night

    Sunday Night: Showers, mainly after 2am. Low around 39. Chance of precipitation is 80%.

    Low: 39 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 52. Southwest wind around 14 mph. Chance of precipitation is 50%.
Thursday
Rain showers before 5pm, then a chance of rain and snow showers. Temperature falling to around 39 by 5pm. Northwest wind 13 to 16 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday Night
A chance of rain and snow showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. West wind 9 to 13 mph. Chance of precipitation is 30%.
Friday
Increasing clouds, with a high near 45. West wind 5 to 15 mph becoming south in the afternoon.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South wind 13 to 16 mph.
Saturday
Sunny, with a high near 48.
Saturday Night
Increasing clouds, with a low around 32.
Sunday
Cloudy, with a high near 47.
Sunday Night
Showers, mainly after 2am. Low around 39. Chance of precipitation is 80%.
Monday
Showers. High near 55. Breezy. Chance of precipitation is 90%.
Monday Night
Showers likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 38.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Mostly sunny, with a high near 36.
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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:
7:41 pm EDT Mar 11, 2026
Forecast Valid:
11pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026
 
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