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.

Fair

20°F

-7°C

Humidity 85%
Wind Speed Calm
Barometer 30.03 in (1017.0 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 27 Feb 4:56 am EST
Extended Forecast for

Hauppauge NY

  • Today

    Today: Sunny, with a high near 41. Wind chill values between 25 and 35. Calm wind becoming south around 5 mph.

    High: 41 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 28. Light south wind.

    Low: 28 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 48. South wind 3 to 7 mph.

    High: 48 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30. Calm wind becoming north around 5 mph after midnight.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: Scattered snow showers before 1pm. Cloudy, then gradual clearing during the afternoon, with a high near 37. Northwest wind 6 to 11 mph. Chance of precipitation is 40%.

    High: 37 °F

    Scattered
    Snow Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow after 1pm. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.

    High: 37 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 41. Wind chill values between 25 and 35. Calm wind becoming south around 5 mph.
Tonight
Mostly clear, with a low around 28. Light south wind.
Saturday
Mostly sunny, with a high near 48. South wind 3 to 7 mph.
Saturday Night
Mostly cloudy, with a low around 30. Calm wind becoming north around 5 mph after midnight.
Sunday
Scattered snow showers before 1pm. Cloudy, then gradual clearing during the afternoon, with a high near 37. Northwest wind 6 to 11 mph. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Mostly cloudy, with a high near 28.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
A chance of rain and snow after 1pm. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
Tuesday Night
Rain likely. Cloudy, with a low around 30. Chance of precipitation is 70%.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Mostly cloudy, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hauppauge NY
 40.82°N 73.2°W (Elev. 197 ft)
Last Update:
12:50 am EST Feb 27, 2026
Forecast Valid:
5am EST Feb 27, 2026-6pm EST Mar 5, 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