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.

Mostly Cloudy and Breezy

48°F

9°C

Humidity 42%
Wind Speed N 21 G 31 mph
Barometer 30.07 in (1018.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 24 Dec 12:56 pm EST
Extended Forecast for

Hauppauge NY

Winter Storm Watch December 26, 04:00pm until December 27, 01:00pm
Click here for hazard details and duration
Winter Storm Watch

  • This Afternoon

    This Afternoon: Sunny, with a high near 46. Breezy, with a north wind 15 to 20 mph, with gusts as high as 31 mph.

    High: 46 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Increasing clouds, with a low around 28. North wind 5 to 7 mph becoming calm in the evening.

    Low: 28 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: Partly sunny, with a high near 44. Wind chill values between 25 and 35. Southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 44 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 20. Wind chill values between 10 and 15. North wind 10 to 13 mph.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after 1pm. Increasing clouds, with a high near 29. North wind 5 to 9 mph.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

  • Friday Night

    Friday Night: Snow. Low around 22. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

    Low: 22 °F

    Snow

  • Saturday

    Saturday: A 50 percent chance of snow before 1pm. Cloudy, with a high near 33.

    High: 33 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 46. Breezy, with a north wind 15 to 20 mph, with gusts as high as 31 mph.
Tonight
Increasing clouds, with a low around 28. North wind 5 to 7 mph becoming calm in the evening.
Christmas Day
Partly sunny, with a high near 44. Wind chill values between 25 and 35. Southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 20. Wind chill values between 10 and 15. North wind 10 to 13 mph.
Friday
A 30 percent chance of snow after 1pm. Increasing clouds, with a high near 29. North wind 5 to 9 mph.
Friday Night
Snow. Low around 22. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.
Saturday
A 50 percent chance of snow before 1pm. Cloudy, with a high near 33.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 39.
Sunday Night
Rain. Low around 29. Chance of precipitation is 80%.
Monday
Rain likely. Mostly cloudy, with a high near 43. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 31.
Basemap Options
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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:
1:05 pm EST Dec 24, 2025
Forecast Valid:
1pm EST Dec 24, 2025-6pm EST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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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