National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

65°F

18°C

Humidity 45%
Wind Speed NE 9 mph
Barometer 30.18 in (1021.9 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 15 Oct 2:56 pm EDT
Extended Forecast for

Commack NY

  • Tonight

    Tonight: Showers likely after 5am. Increasing clouds, with a low around 51. Southeast wind 3 to 7 mph. Chance of precipitation is 60%.

    Low: 51 °F

    Mostly Clear
    then Showers
    Likely

  • Friday

    Friday: Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 72. Southwest wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms before 2am, then showers likely. Low around 45. Northwest wind 8 to 13 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 53. North wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 53 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. North wind 9 to 13 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely after 5am. Increasing clouds, with a low around 51. Southeast wind 3 to 7 mph. Chance of precipitation is 60%.
Friday
Showers before 2pm, then a chance of showers and thunderstorms after 5pm. High near 72. Southwest wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms before 2am, then showers likely. Low around 45. Northwest wind 8 to 13 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 53. North wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Saturday Night
Mostly clear, with a low around 39. North wind 9 to 13 mph.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 61.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Commack NY
 40.85°N 73.28°W (Elev. 144 ft)
Last Update:
2:36 pm EDT Oct 15, 2026
Forecast Valid:
3pm EDT Oct 15, 2026-6pm EDT Oct 22, 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