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

59°F

15°C

Humidity 44%
Wind Speed SE 9 mph
Barometer 30.24 in (1024.1 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 27 Apr 5:56 pm EDT
Extended Forecast for

Holbrook NY

  • Tonight

    Tonight: Clear, with a low around 44. Southeast wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 64. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 64 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 59. Calm wind becoming southeast 5 to 8 mph in the morning.

    High: 59 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Showers. Low around 45. Southeast wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Showers

  • Thursday

    Thursday: Showers, mainly before 2pm. High near 56. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 43.

    Low: 43 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 44. Southeast wind around 5 mph becoming calm in the evening.
Tuesday
Increasing clouds, with a high near 64. Calm wind becoming southeast around 6 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 44. Calm wind.
Wednesday
Partly sunny, with a high near 59. Calm wind becoming southeast 5 to 8 mph in the morning.
Wednesday Night
Showers. Low around 45. Southeast wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers, mainly before 2pm. High near 56. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 43.
Friday
Sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 44.
Saturday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 57.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 59.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Holbrook NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
5:40 pm EDT Apr 27, 2026
Forecast Valid:
6pm EDT Apr 27, 2026-6pm EDT May 4, 2026
 
Forecast Discussion
 
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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