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

28°F

-2°C

Humidity 81%
Wind Speed Calm
Barometer 30.04 in (1017.4 mb)
Dewpoint 23°F (-5°C)
Visibility 9.00 mi
Last update 7 Dec 4:56 am EST
Extended Forecast for

Holbrook NY

  • Today

    Today: Partly sunny, with a high near 42. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 42 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind 6 to 13 mph, with gusts as high as 25 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. Wind chill values between 15 and 20. North wind 10 to 16 mph, with gusts as high as 30 mph.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. North wind 5 to 7 mph becoming calm after midnight.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 41. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 41 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain. Mostly cloudy, with a high near 48.

    High: 48 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 42. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tonight
Partly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind 6 to 13 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 31. Wind chill values between 15 and 20. North wind 10 to 16 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 15. North wind 5 to 7 mph becoming calm after midnight.
Tuesday
Increasing clouds, with a high near 41. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 48.
Wednesday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Saturday
A chance of rain and snow. Partly sunny, with a high near 35. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Holbrook NY
 40.8°N 73.06°W (Elev. 66 ft)
Last Update:
4:20 am EST Dec 7, 2025
Forecast Valid:
5am EST Dec 7, 2025-6pm EST Dec 13, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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