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

66°F

19°C

Humidity 87%
Wind Speed SW 14 G 24 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 5 Nov 6:56 pm EST
Extended Forecast for

East Setauket NY

  • Tonight

    Tonight: Rain, with thunderstorms also possible after 4am. Low around 61. South wind 6 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Rain

  • Friday

    Friday: Rain and possibly a thunderstorm before 4pm, then rain likely. High near 66. Southwest wind 3 to 5 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 66 °F

    Rain

  • Friday Night

    Friday Night: Rain likely, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 55. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 55 °F

    Rain Likely

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 64. West wind 5 to 7 mph.

    High: 64 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 47. West wind 11 to 14 mph.

    Low: 47 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Tonight
Rain, with thunderstorms also possible after 4am. Low around 61. South wind 6 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Rain and possibly a thunderstorm before 4pm, then rain likely. High near 66. Southwest wind 3 to 5 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday Night
Rain likely, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 55. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 64. West wind 5 to 7 mph.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47. West wind 11 to 14 mph.
Sunday
Mostly sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 46.
Veterans Day
Sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Sunny, with a high near 54.
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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:
1:31 pm EST Nov 5, 2026
Forecast Valid:
7pm EST Nov 5, 2026-6pm EST Nov 12, 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