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.

Fair

66°F

19°C

Humidity 100%
Wind Speed SW 3 mph
Barometer 29.90 in (1012.5 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 31 Jul 2:56 am EDT
Extended Forecast for

Holbrook NYSimilar City Names

  • Overnight

    Overnight: Mostly clear, with a low around 63. Light northwest wind.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 83. Light and variable wind becoming southwest 5 to 7 mph in the morning.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 68. Southwest wind 3 to 6 mph.

    Low: 68 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 84. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 69. South wind 6 to 8 mph.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.

    Low: 70 °F

    Mostly Cloudy
    then Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 63. Light northwest wind.
Friday
Sunny, with a high near 83. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Friday Night
Partly cloudy, with a low around 68. Southwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 84. Calm wind becoming south 5 to 9 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 69. South wind 6 to 8 mph.
Sunday
Partly sunny, with a high near 82.
Sunday Night
Showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.
Monday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Tuesday
A 30 percent chance of showers before 2pm. Partly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 69.
Thursday
A 30 percent chance of showers. Mostly 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:
2:30 am EDT Jul 31, 2026
Forecast Valid:
3am EDT Jul 31, 2026-6pm EDT Aug 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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