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

72°F

22°C

Humidity 55%
Wind Speed NW 18 G 26 mph
Barometer 29.55 in (1000.7 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 17 May 10:56 pm EDT
Extended Forecast for

East Setauket NY

  • Tonight

    Tonight: Isolated showers and thunderstorms before midnight. Partly cloudy, with a low around 59. West wind around 9 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Isolated
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 73. West wind 11 to 17 mph, with gusts as high as 28 mph.

    High: 73 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. West wind around 16 mph, with gusts as high as 26 mph.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 73. Northwest wind around 15 mph, with gusts as high as 28 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. Northwest wind 11 to 14 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Showers

Detailed Forecast

Tonight
Isolated showers and thunderstorms before midnight. Partly cloudy, with a low around 59. West wind around 9 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 73. West wind 11 to 17 mph, with gusts as high as 28 mph.
Sunday Night
Partly cloudy, with a low around 56. West wind around 16 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 73. Northwest wind around 15 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 51. Northwest wind 11 to 14 mph.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.
Wednesday Night
Showers. Low around 51. Chance of precipitation is 80%.
Thursday
Showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 50.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 64.
Friday Night
Mostly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 69.
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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:
7:16 pm EDT May 17, 2025
Forecast Valid:
11pm EDT May 17, 2025-6pm EDT May 24, 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