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.

A Few Clouds

76°F

24°C

Humidity 64%
Wind Speed SW 12 mph
Barometer 29.96 in (1014.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 25 Aug 5:56 pm EDT
Extended Forecast for

Holbrook NYSimilar City Names

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Patchy fog after 2am. Otherwise, mostly clear, with a low around 62. West wind 5 to 10 mph becoming light northwest after midnight.

    Low: 62 °F

    Slight Chance
    T-storms then
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 79. Northwest wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 79 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 67. South wind 5 to 7 mph.

    Low: 67 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 79. South wind 9 to 16 mph. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 67. South wind 5 to 9 mph becoming light after midnight.

    Low: 67 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 66.

    Low: 66 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Patchy fog after 2am. Otherwise, mostly clear, with a low around 62. West wind 5 to 10 mph becoming light northwest after midnight.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 79. Northwest wind 6 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 67. South wind 5 to 7 mph.
Thursday
A slight chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 79. South wind 9 to 16 mph. Chance of precipitation is 20%.
Thursday Night
A 50 percent chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 67. South wind 5 to 9 mph becoming light after midnight.
Friday
A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Friday Night
Mostly cloudy, with a low around 66.
Saturday
Partly sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 67.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Holbrook NYSimilar City Names
 40.8°N 73.06°W (Elev. 66 ft)
Last Update:
3:10 pm EDT Aug 25, 2026
Forecast Valid:
6pm EDT Aug 25, 2026-6pm EDT Sep 1, 2026
 
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Additional Resources

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Chance of Precipitation