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

65°F

18°C

Humidity 63%
Wind Speed S 8 mph
Barometer 30.04 in (1017.2 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 1 Apr 1:56 pm EDT
Extended Forecast for

Holbrook NY

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 69. Southwest wind around 9 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 41. Light northeast wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Showers

  • Thursday

    Thursday: A 40 percent chance of showers, mainly before 11am. Cloudy, with a high near 46. Northeast wind around 14 mph, with gusts as high as 25 mph.

    High: 46 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 8pm. Cloudy, with a low around 39. East wind 5 to 9 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 58. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 58 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers. High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Showers

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 69. Southwest wind around 9 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm. Low around 41. Light northeast wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 40 percent chance of showers, mainly before 11am. Cloudy, with a high near 46. Northeast wind around 14 mph, with gusts as high as 25 mph.
Thursday Night
A 20 percent chance of showers after 8pm. Cloudy, with a low around 39. East wind 5 to 9 mph, with gusts as high as 20 mph.
Friday
Mostly cloudy, with a high near 58. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Showers. High near 58. Chance of precipitation is 80%.
Sunday Night
Showers, mainly before 8pm. Low around 39. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Mostly sunny, with a high near 50.
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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:
2:31 pm EDT Apr 1, 2026
Forecast Valid:
2pm EDT Apr 1, 2026-6pm EDT Apr 7, 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