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.

Partly Cloudy

46°F

8°C

Humidity 38%
Wind Speed N 7 mph
Barometer 30.27 in (1024.9 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 1 Dec 12:56 pm EST
Extended Forecast for

Hauppauge NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 41. North wind 7 to 10 mph.

    High: 41 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 4am. Increasing clouds, with a low around 28. Light east wind.

    Low: 28 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: Rain, mainly after 7am. High near 46. East wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    High: 46 °F

    Rain

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 29. Wind chill values between 20 and 25. Northwest wind around 10 mph, with gusts as high as 28 mph.

    Low: 29 °F

    Chance Rain

  • Wednesday

    Wednesday: Sunny, with a high near 39. Northwest wind 6 to 9 mph.

    High: 39 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 19.

    Low: 19 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 41. North wind 7 to 10 mph.
Tonight
A 20 percent chance of rain after 4am. Increasing clouds, with a low around 28. Light east wind.
Tuesday
Rain, mainly after 7am. High near 46. East wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Tuesday Night
A 40 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 29. Wind chill values between 20 and 25. Northwest wind around 10 mph, with gusts as high as 28 mph.
Wednesday
Sunny, with a high near 39. Northwest wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 42.
Thursday Night
Mostly clear, with a low around 19.
Friday
Mostly sunny, with a high near 36.
Friday Night
A 50 percent chance of snow after 10pm. Mostly cloudy, with a low around 27.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 50%.
Saturday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 42.
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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:
10:02 am EST Dec 1, 2025
Forecast Valid:
1pm EST Dec 1, 2025-6pm EST Dec 7, 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