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.

Fog/Mist

27°F

-3°C

Humidity 96%
Wind Speed Calm
Barometer 29.79 in (1008.8 mb)
Dewpoint 26°F (-3°C)
Visibility 2.50 mi
Last update 26 Feb 4:56 am EST
Extended Forecast for

Hauppauge NY

  • Today

    Today: A 20 percent chance of snow after 1pm. Increasing clouds, with a high near 37. Wind chill values between 25 and 35. Calm wind becoming northwest around 5 mph.

    High: 37 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 21. Calm wind.

    Low: 21 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 38. Wind chill values between 20 and 30. Calm wind becoming south around 5 mph.

    High: 38 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 29. Light south wind.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 44. Southwest wind 3 to 6 mph.

    High: 44 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 29.

    Low: 29 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy, then gradual clearing during the afternoon, with a high near 37.

    High: 37 °F

    Clearing Late

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of snow. Mostly cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

Detailed Forecast

Today
A 20 percent chance of snow after 1pm. Increasing clouds, with a high near 37. Wind chill values between 25 and 35. Calm wind becoming northwest around 5 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 21. Calm wind.
Friday
Sunny, with a high near 38. Wind chill values between 20 and 30. Calm wind becoming south around 5 mph.
Friday Night
Mostly clear, with a low around 29. Light south wind.
Saturday
Sunny, with a high near 44. Southwest wind 3 to 6 mph.
Saturday Night
Increasing clouds, with a low around 29.
Sunday
Cloudy, then gradual clearing during the afternoon, with a high near 37.
Sunday Night
Partly cloudy, with a low around 17.
Monday
A 30 percent chance of snow. Mostly cloudy, with a high near 27.
Monday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 18.
Tuesday
A 30 percent chance of snow. Mostly cloudy, with a high near 35.
Tuesday Night
A 50 percent chance of snow. Cloudy, with a low around 28.
Wednesday
A 50 percent chance of rain. Partly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hauppauge NY
 40.82°N 73.2°W (Elev. 197 ft)
Last Update:
5:06 am EST Feb 26, 2026
Forecast Valid:
5am EST Feb 26, 2026-6pm EST Mar 4, 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