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.

Rain

44°F

7°C

Humidity 85%
Wind Speed SW 18 G 29 mph
Barometer 29.84 in (1010.4 mb)
Dewpoint 40°F (4°C)
Visibility 8.00 mi
Wind Chill36°F (2°C)
Last update 20 Mar 9:56 pm EDT
Extended Forecast for

Holbrook NY

  • Tonight

    Tonight: Showers, mainly before 2am. Patchy fog after 2am. Low around 43. Southwest wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 43 °F

    Showers then
    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 55. North wind 7 to 11 mph.

    High: 55 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 39. Calm wind.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 54. South wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 8pm. Cloudy, with a low around 40. South wind around 6 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain Likely

  • Monday

    Monday: A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 44.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers, mainly before 2am. Patchy fog after 2am. Low around 43. Southwest wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 55. North wind 7 to 11 mph.
Saturday Night
Increasing clouds, with a low around 39. Calm wind.
Sunday
A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 54. South wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Rain likely, mainly after 8pm. Cloudy, with a low around 40. South wind around 6 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 47.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 47.
Wednesday Night
Partly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 49.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Holbrook NY
 40.78°N 73.06°W (Elev. 49 ft)
Last Update:
8:14 pm EDT Mar 20, 2026
Forecast Valid:
10pm EDT Mar 20, 2026-6pm EDT Mar 27, 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