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.

Overcast

62°F

17°C

Humidity 78%
Wind Speed SE 12 mph
Barometer 30.00 in (1015.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 16 Oct 4:56 am EDT
Extended Forecast for

East Setauket NY

  • Overnight

    Overnight: A 50 percent chance of showers. Cloudy, with a steady temperature around 58. South wind around 8 mph.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 2pm. High near 71. Southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms before 2am, then showers likely. Low around 47. Southwest wind 10 to 14 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 53. North wind 15 to 17 mph, with gusts as high as 29 mph.

    High: 53 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40. North wind 11 to 15 mph.

    Low: 40 °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 45.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers. Cloudy, with a steady temperature around 58. South wind around 8 mph.
Friday
Showers, with thunderstorms also possible after 2pm. High near 71. Southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms before 2am, then showers likely. Low around 47. Southwest wind 10 to 14 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 53. North wind 15 to 17 mph, with gusts as high as 29 mph.
Saturday Night
Mostly clear, with a low around 40. North wind 11 to 15 mph.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 45.
Monday
Mostly sunny, with a high near 58.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Partly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Mostly sunny, with a high near 59.
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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:
3:47 am EDT Oct 16, 2026
Forecast Valid:
5am EDT Oct 16, 2026-6pm EDT Oct 22, 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