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.

Light Snow Fog/Mist

28°F

-2°C

Humidity 92%
Wind Speed NE 12 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 26°F (-3°C)
Visibility 6.00 mi
Wind Chill18°F (-8°C)
Last update 16 Feb 5:56 am EST
Extended Forecast for

Hauppauge NY

  • Washington's Birthday

    Washington's Birthday: A 30 percent chance of snow before 7am. Cloudy through mid morning, then gradual clearing, with a high near 38. Wind chill values between 25 and 35. Northeast wind 5 to 10 mph.

    High: 38 °F

    Chance Snow
    then Mostly
    Sunny

  • Tonight

    Tonight: A 20 percent chance of snow after 4am. Mostly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 41. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 41 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 31. Calm wind.

    Low: 31 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Rain likely, mainly after 1pm. Cloudy, with a high near 40. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 40 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain likely before 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 32 °F

    Rain Likely

  • Thursday

    Thursday: Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 40. Chance of precipitation is 70%.

    High: 40 °F

    Rain Likely

Detailed Forecast

Washington's Birthday
A 30 percent chance of snow before 7am. Cloudy through mid morning, then gradual clearing, with a high near 38. Wind chill values between 25 and 35. Northeast wind 5 to 10 mph.
Tonight
A 20 percent chance of snow after 4am. Mostly cloudy, with a low around 28. Calm wind.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 41. Calm wind becoming southwest 5 to 7 mph in the morning.
Tuesday Night
Increasing clouds, with a low around 31. Calm wind.
Wednesday
Rain likely, mainly after 1pm. Cloudy, with a high near 40. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely before 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly cloudy, with a high near 40.
Thursday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 29.
Friday
Rain likely. Mostly cloudy, with a high near 40. Chance of precipitation is 70%.
Friday Night
A chance of rain and snow. Cloudy, with a low around 31. Chance of precipitation is 50%.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 28.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hauppauge NY
 40.82°N 73.2°W (Elev. 197 ft)
Last Update:
2:01 am EST Feb 16, 2026
Forecast Valid:
6am EST Feb 16, 2026-6pm EST Feb 22, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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