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 91%
Wind Speed NW 5 mph
Barometer 29.81 in (1009.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 13 Aug 6:56 am EDT
Extended Forecast for

East Setauket NY

  • Today

    Today: Showers and thunderstorms before 11am, then a slight chance of showers after 2pm.  High near 83. Light west wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 21 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    T-storms then
    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 68. Northwest wind 5 to 7 mph.

    Low: 68 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 83. Northwest wind 6 to 8 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers before 2am.  Partly cloudy, with a low around 67. Calm wind becoming north 5 to 8 mph after midnight.

    Low: 67 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 82. North wind 5 to 13 mph.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers after 2pm.  Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers, mainly after 8pm.  Low around 71. Chance of precipitation is 80%.

    Low: 71 °F

    Showers

  • Monday

    Monday: Showers likely before 8am.  Partly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely then
    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms before 11am, then a slight chance of showers after 2pm. High near 83. Light west wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Partly cloudy, with a low around 68. Northwest wind 5 to 7 mph.
Friday
Sunny, with a high near 83. Northwest wind 6 to 8 mph.
Friday Night
A 20 percent chance of showers before 2am. Partly cloudy, with a low around 67. Calm wind becoming north 5 to 8 mph after midnight.
Saturday
Sunny, with a high near 82. North wind 5 to 13 mph.
Saturday Night
Partly cloudy, with a low around 67.
Sunday
A 40 percent chance of showers after 2pm. Partly sunny, with a high near 82.
Sunday Night
Showers, mainly after 8pm. Low around 71. Chance of precipitation is 80%.
Monday
Showers likely before 8am. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NY
 40.94°N 73.11°W (Elev. 52 ft)
4:30 am EDT Aug 13, 2026
7am EDT Aug 13, 2026-6pm EDT Aug 19, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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