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.

Overcast

40°F

4°C

Humidity 70%
Wind Speed Calm
Barometer 30.16 in (1021.4 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 19 Nov 1:56 am EST
Extended Forecast for

Commack NY

  • Overnight

    Overnight: Rain likely, mainly after 4am. Cloudy, with a low around 36. Calm wind. Chance of precipitation is 70%.

    Low: 36 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain likely before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 46. Calm wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Rain Likely
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 34. North wind 3 to 5 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 48. Northeast wind around 6 mph becoming calm in the afternoon.

    High: 48 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 37. Calm wind.

    Low: 37 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

  • Saturday

    Saturday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 53.

    High: 53 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain likely, mainly after 4am. Cloudy, with a low around 36. Calm wind. Chance of precipitation is 70%.
Wednesday
Rain likely before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 46. Calm wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Increasing clouds, with a low around 34. North wind 3 to 5 mph.
Thursday
Partly sunny, with a high near 48. Northeast wind around 6 mph becoming calm in the afternoon.
Thursday Night
Increasing clouds, with a low around 37. Calm wind.
Friday
Mostly cloudy, with a high near 54.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 40.
Saturday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 53.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Partly sunny, with a high near 52.
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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:
1:50 am EST Nov 19, 2025
Forecast Valid:
2am EST Nov 19, 2025-6pm EST Nov 25, 2025
 
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