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.

Mostly Cloudy

42°F

6°C

Humidity 51%
Wind Speed NW 5 mph
Barometer 30.14 in (1020.8 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 18 Nov 7:56 pm EST
Extended Forecast for

Hauppauge NY

  • Tonight

    Tonight: A chance of rain between 1am and 4am, then snow likely, possibly mixed with rain. Mostly cloudy, with a low around 35. Light west wind. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 35 °F

    Mostly Cloudy
    then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: Snow likely, possibly mixed with rain before 7am, then a slight chance of rain between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 48. Calm wind becoming north around 6 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 48 °F

    Rain/Snow
    Likely then
    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: Areas of frost. Otherwise, mostly cloudy, with a low around 34. Light north wind.

    Low: 34 °F

    Areas Frost

  • Thursday

    Thursday: Partly sunny, with a high near 50. Northeast wind 3 to 6 mph.

    High: 50 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of rain between 1am and 4am, then snow likely, possibly mixed with rain. Mostly cloudy, with a low around 35. Light west wind. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday
Snow likely, possibly mixed with rain before 7am, then a slight chance of rain between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 48. Calm wind becoming north around 6 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
Areas of frost. Otherwise, mostly cloudy, with a low around 34. Light north wind.
Thursday
Partly sunny, with a high near 50. Northeast wind 3 to 6 mph.
Thursday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 42. Calm wind.
Friday
Mostly cloudy, with a high near 54.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 52.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 53.
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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:
8:17 pm EST Nov 18, 2025
Forecast Valid:
8pm EST Nov 18, 2025-6pm EST Nov 25, 2025
 
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Additional Resources

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Chance of Precipitation