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.

Rain Fog/Mist

59°F

15°C

Humidity 90%
Wind Speed E 9 mph
Barometer 30.28 in (1025.3 mb)
Dewpoint 56°F (13°C)
Visibility 5.00 mi
Last update 11 Oct 12:56 pm EDT
Extended Forecast for

East Setauket NY

  • This Afternoon

    This Afternoon: Rain. High near 64. East wind 11 to 13 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Rain

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms, mainly between 2am and 5am. Low around 56. East wind 14 to 16 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Rain then
    Rain Likely

  • Columbus Day

    Columbus Day: A 30 percent chance of showers before 11am. Cloudy through mid morning, then gradual clearing, with a high near 68. North wind 7 to 13 mph.

    High: 68 °F

    Chance
    Showers then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. Northwest wind 3 to 5 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68. Light and variable wind becoming south 5 to 8 mph in the morning.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Rain. High near 64. East wind 11 to 13 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms, mainly between 2am and 5am. Low around 56. East wind 14 to 16 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Columbus Day
A 30 percent chance of showers before 11am. Cloudy through mid morning, then gradual clearing, with a high near 68. North wind 7 to 13 mph.
Monday Night
Mostly clear, with a low around 56. Northwest wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 68. Light and variable wind becoming south 5 to 8 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 50.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 65.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 51. Breezy.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 60. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NY
 40.94°N 73.11°W (Elev. 52 ft)
Last Update:
11:12 am EDT Oct 11, 2026
Forecast Valid:
1pm EDT Oct 11, 2026-6pm EDT Oct 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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