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.

Light Rain

58°F

14°C

Humidity 84%
Wind Speed NW 5 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 14 May 12:56 pm EDT
Extended Forecast for

East Setauket NY

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm before 2pm, then showers likely. High near 66. Northwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 66 °F

    Showers

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 8pm. Partly cloudy, with a low around 53. West wind around 6 mph.

    Low: 53 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 65. Northwest wind around 7 mph.

    High: 65 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 55. Light and variable wind.

    Low: 55 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78. Southwest wind 5 to 11 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 2pm, then showers likely. High near 66. Northwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers, mainly before 8pm. Partly cloudy, with a low around 53. West wind around 6 mph.
Friday
A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 65. Northwest wind around 7 mph.
Friday Night
Mostly clear, with a low around 55. Light and variable wind.
Saturday
Sunny, with a high near 78. Southwest wind 5 to 11 mph.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 60.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
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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:
6:45 am EDT May 14, 2026
Forecast Valid:
1pm EDT May 14, 2026-6pm EDT May 20, 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