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.

Mostly Cloudy

51°F

11°C

Humidity 48%
Wind Speed N 20 G 29 mph
Barometer 30.01 in (1016.2 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 27 Mar 12:56 pm EDT
Extended Forecast for

Holbrook NY

  • This Afternoon

    This Afternoon: Mostly cloudy, with a steady temperature around 49. North wind 11 to 13 mph.

    High: 49 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. North wind 5 to 8 mph.

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 41. Wind chill values between 20 and 30. Northwest wind 9 to 13 mph.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28. Northwest wind around 6 mph becoming calm in the evening.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 46. South wind 5 to 14 mph, with gusts as high as 26 mph.

    High: 46 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 54.

    High: 54 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain. Partly sunny, with a high near 55.

    High: 55 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly cloudy, with a steady temperature around 49. North wind 11 to 13 mph.
Tonight
Mostly cloudy, with a low around 30. North wind 5 to 8 mph.
Saturday
Mostly sunny, with a high near 41. Wind chill values between 20 and 30. Northwest wind 9 to 13 mph.
Saturday Night
Partly cloudy, with a low around 28. Northwest wind around 6 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 46. South wind 5 to 14 mph, with gusts as high as 26 mph.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
Partly sunny, with a high near 54.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 55.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 59.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 46.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 60.
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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:
7:52 am EDT Mar 27, 2026
Forecast Valid:
1pm EDT Mar 27, 2026-6pm EDT Apr 2, 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