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.

Mostly Cloudy

57°F

14°C

Humidity 72%
Wind Speed SE 6 mph
Barometer 30.16 in (1021.4 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 15 Oct 9:56 pm EDT
Extended Forecast for

Setauket-East Setauket NY

  • Tonight

    Tonight: Showers likely after 5am. Increasing clouds, with a temperature rising to around 56 by 4am. Southeast wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 53 °F⇑

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers, with thunderstorms also possible after 2pm. High near 71. Southwest wind 10 to 13 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms before 2am, then showers likely. Low around 46. West wind 9 to 14 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 54. North wind around 17 mph. Chance of precipitation is 60%.

    High: 54 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. North wind 10 to 15 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

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

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely after 5am. Increasing clouds, with a temperature rising to around 56 by 4am. Southeast wind 5 to 7 mph. Chance of precipitation is 60%.
Friday
Showers, with thunderstorms also possible after 2pm. High near 71. Southwest wind 10 to 13 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms before 2am, then showers likely. Low around 46. West wind 9 to 14 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 54. North wind around 17 mph. Chance of precipitation is 60%.
Saturday Night
Mostly clear, with a low around 41. North wind 10 to 15 mph.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 61.
Monday Night
Partly cloudy, with a low around 49.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
Setauket-East Setauket NY
 40.94°N 73.11°W (Elev. 52 ft)
Last Update:
2:36 pm EDT Oct 15, 2026
Forecast Valid:
10pm EDT Oct 15, 2026-6pm EDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation