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.

Mostly Cloudy

54°F

12°C

Humidity 42%
Wind Speed NW 9 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 1 Nov 6:56 pm EDT
Extended Forecast for

Setauket-East Setauket NY

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 57. Northwest wind 5 to 7 mph.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44. Light southwest wind.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after 2pm. Partly sunny, with a high near 61. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 61 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: A 30 percent chance of rain before 2am. Partly cloudy, with a low around 46. Southwest wind 8 to 10 mph becoming west after midnight.

    Low: 46 °F

    Chance Rain

  • Tuesday

    Tuesday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 40. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 57. Northwest wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 44. Light southwest wind.
Monday
A 30 percent chance of rain after 2pm. Partly sunny, with a high near 61. Light southwest wind increasing to 5 to 10 mph in the morning.
Monday Night
A 30 percent chance of rain before 2am. Partly cloudy, with a low around 46. Southwest wind 8 to 10 mph becoming west after midnight.
Tuesday
Sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Mostly sunny, with a high near 60.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 55.
Thursday Night
Mostly clear, with a low around 39.
Friday
Partly sunny, with a high near 58.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Setauket-East Setauket NY
 40.91°N 73.09°W (Elev. 197 ft)
Last Update:
3:53 pm EDT Nov 1, 2025
Forecast Valid:
7pm EDT Nov 1, 2025-6pm EST Nov 8, 2025
 
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