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.

Overcast

66°F

19°C

Humidity 84%
Wind Speed E 8 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 16 Jun 6:56 pm EDT
Extended Forecast for

East Setauket NYSimilar City Names

  • Tonight

    Tonight: A slight chance of showers between 8pm and 2am, then a slight chance of drizzle or light rain after 2am. Patchy fog after 8pm. Otherwise, cloudy, with a low around 61. East wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A 40 percent chance of showers, mainly after 8am. Patchy fog before noon. Otherwise, cloudy, with a high near 71. East wind 7 to 9 mph.

    High: 71 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: A chance of showers, with thunderstorms also possible after 2am. Patchy fog. Otherwise, cloudy, with a low around 63. South wind around 6 mph. Chance of precipitation is 50%.

    Low: 63 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 80. South wind 5 to 7 mph. Chance of precipitation is 40%.

    High: 80 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 68. Southwest wind around 6 mph. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 2am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of showers between 8pm and 2am, then a slight chance of drizzle or light rain after 2am. Patchy fog after 8pm. Otherwise, cloudy, with a low around 61. East wind 5 to 10 mph. Chance of precipitation is 20%.
Tuesday
A 40 percent chance of showers, mainly after 8am. Patchy fog before noon. Otherwise, cloudy, with a high near 71. East wind 7 to 9 mph.
Tuesday Night
A chance of showers, with thunderstorms also possible after 2am. Patchy fog. Otherwise, cloudy, with a low around 63. South wind around 6 mph. Chance of precipitation is 50%.
Wednesday
A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 80. South wind 5 to 7 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 68. Southwest wind around 6 mph. Chance of precipitation is 40%.
Juneteenth
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 88.
Thursday Night
A 30 percent chance of showers before 2am. Partly cloudy, with a low around 67.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 64.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NYSimilar City Names
 40.94°N 73.11°W (Elev. 52 ft)
Last Update:
7:07 pm EDT Jun 16, 2025
Forecast Valid:
7pm EDT Jun 16, 2025-6pm EDT Jun 23, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation