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.

A Few Clouds

48°F

9°C

Humidity 61%
Wind Speed W 6 mph
Barometer 29.96 in (1014.5 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 9 Nov 10:56 pm EST
Extended Forecast for

Setauket-East Setauket NY

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 44. West wind around 10 mph.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 59. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 59 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46. West wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 46 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 59. West wind 5 to 7 mph.

    High: 59 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 44. Calm wind becoming northeast around 5 mph after midnight.

    Low: 44 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 50 percent chance of rain after 1pm. Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 41. Breezy. Chance of precipitation is 80%.

    Low: 41 °F

    Rain and
    Breezy

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 49. Breezy. Chance of precipitation is 60%.

    High: 49 °F

    Rain Likely
    and Breezy

  • Friday Night

    Friday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a steady temperature around 44. West wind around 10 mph.
Tuesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 59. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 46. West wind 8 to 10 mph, with gusts as high as 21 mph.
Veterans Day
Sunny, with a high near 59. West wind 5 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 44. Calm wind becoming northeast around 5 mph after midnight.
Thursday
A 50 percent chance of rain after 1pm. Mostly cloudy, with a high near 59.
Thursday Night
Rain. Low around 41. Breezy. Chance of precipitation is 80%.
Friday
Rain likely. Mostly cloudy, with a high near 49. Breezy. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Saturday
Mostly cloudy, with a high near 48.
Saturday Night
Mostly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Mostly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Setauket-East Setauket NY
 40.94°N 73.09°W (Elev. 98 ft)
Last Update:
1:27 pm EST Nov 9, 2026
Forecast Valid:
11pm EST Nov 9, 2026-6pm EST Nov 16, 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