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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 40.73°N 73.22°W (Text-Only)
NWS Forecast for: Islip NY
Issued by: National Weather Service New York, NY
Last Update: 7:08 am EDT Jun 30, 2026		Print

  • Today

    Today: Mostly sunny, with a high near 83. South wind 9 to 15 mph.

    High: 83 °F

    Mostly Sunny



  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 70. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.

    Low: 70 °F

    Slight Chance
    T-storms


  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Southwest wind 10 to 15 mph.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday
    Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 72 °F

    Slight Chance
    T-storms


  • Thursday

    Thursday: Sunny, with a high near 94. Southwest wind 8 to 13 mph.

    High: 94 °F

    Sunny



  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear



  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny



  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy



  • Independence
    Day

    Independence Day: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny
    then Chance
    Showers



    • Today: Mostly sunny, with a high near 83. South wind 9 to 15 mph.

    Tonight: A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 70. Southwest wind 10 to 15 mph, with gusts as high as 26 mph.

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Southwest wind 10 to 15 mph.

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.

    Thursday: Sunny, with a high near 94. Southwest wind 8 to 13 mph.

    Thursday Night: Mostly clear, with a low around 77.

    Friday: Sunny, with a high near 96.

    Friday Night: Partly cloudy, with a low around 76.

    Independence Day: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 91.

    Saturday Night: A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 73.

    Sunday: A 30 percent chance of showers. Mostly sunny, with a high near 89.

    Sunday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 71.

    Monday: A 30 percent chance of showers. Partly sunny, with a high near 84.


    Islip NY
     40.73°N 73.22°W (Elev. 7 ft)

    Visit your local NWS office at: https://www.weather.gov/okx/