National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

62°F

17°C

Humidity 70%
Wind Speed SW 14 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 17 May 12:56 am EDT
Extended Forecast for

East Setauket NY

  • Overnight

    Overnight: A chance of sprinkles. Mostly cloudy, with a low around 61. Southwest wind 9 to 11 mph.

    Low: 61 °F

    Chance
    Sprinkles

  • Sunday

    Sunday: Sunny, with a high near 84. West wind around 7 mph.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 60. Southwest wind around 6 mph becoming calm in the evening.

    Low: 60 °F

    Increasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 77. East wind 6 to 9 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. South wind around 5 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of showers after 2pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Sunny then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

Detailed Forecast

Overnight
A chance of sprinkles. Mostly cloudy, with a low around 61. Southwest wind 9 to 11 mph.
Sunday
Sunny, with a high near 84. West wind around 7 mph.
Sunday Night
Increasing clouds, with a low around 60. Southwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 77. East wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 60. South wind around 5 mph.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
A 50 percent chance of showers after 2pm. Mostly sunny, with a high near 87.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 59.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 55.
Friday
Partly sunny, with a high near 66.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 53.
Saturday
A 30 percent chance of showers. Partly 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:
2:24 pm EDT May 16, 2026
Forecast Valid:
1am EDT May 17, 2026-6pm EDT May 23, 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