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.

Light Rain

58°F

14°C

Humidity 70%
Wind Speed E 17 G 29 mph
Barometer 29.51 in (999.1 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 12 Nov 12:56 pm EST
Extended Forecast for

East Setauket NY

  • This Afternoon

    This Afternoon: Rain. High near 60. East wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F

    Rain

  • Tonight

    Tonight: Rain. Low around 41. Breezy, with a northeast wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain and
    Breezy

  • Friday

    Friday: Rain. High near 48. North wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 48 °F

    Rain

  • Friday Night

    Friday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 38. North wind around 11 mph.

    Low: 38 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Partly sunny, with a high near 49. Northwest wind 10 to 13 mph.

    High: 49 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

Detailed Forecast

This Afternoon
Rain. High near 60. East wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain. Low around 41. Breezy, with a northeast wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain. High near 48. North wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 38. North wind around 11 mph.
Saturday
Partly sunny, with a high near 49. Northwest wind 10 to 13 mph.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 52.
Tuesday Night
Mostly clear, with a low around 39.
Wednesday
Sunny, with a high near 56.
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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:
10:28 am EST Nov 12, 2026
Forecast Valid:
1pm EST Nov 12, 2026-6pm EST Nov 18, 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