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 Rain

44°F

7°C

Humidity 85%
Wind Speed S 6 mph
Barometer 29.51 in (999.4 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 14 Jan 7:56 pm EST
Extended Forecast for

Hauppauge NY

  • Tonight

    Tonight: A 50 percent chance of rain, mainly after 4am. Cloudy, with a low around 39. South wind 5 to 7 mph.

    Low: 39 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain before 7am. Mostly cloudy, then gradually becoming sunny, with a temperature rising to near 41 by 9am, then falling to around 33 during the remainder of the day. Wind chill values between 20 and 30. West wind 7 to 17 mph.

    High: 41 °F⇓

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 20. Wind chill values between 5 and 15. West wind 14 to 16 mph.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 36. Wind chill values between 5 and 15. West wind 11 to 17 mph.

    High: 36 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a steady temperature around 32. Southwest wind 7 to 9 mph.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of rain. Mostly cloudy, with a high near 42.

    High: 42 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 33.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before 1am. Partly cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow

Detailed Forecast

Tonight
A 50 percent chance of rain, mainly after 4am. Cloudy, with a low around 39. South wind 5 to 7 mph.
Thursday
A 30 percent chance of rain before 7am. Mostly cloudy, then gradually becoming sunny, with a temperature rising to near 41 by 9am, then falling to around 33 during the remainder of the day. Wind chill values between 20 and 30. West wind 7 to 17 mph.
Thursday Night
Partly cloudy, with a low around 20. Wind chill values between 5 and 15. West wind 14 to 16 mph.
Friday
Sunny, with a high near 36. Wind chill values between 5 and 15. West wind 11 to 17 mph.
Friday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a steady temperature around 32. Southwest wind 7 to 9 mph.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 42.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 33.
Sunday Night
A 30 percent chance of snow before 1am. Partly cloudy, with a low around 20.
M.L.King Day
Sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 26.
Tuesday Night
Partly cloudy, with a low around 15.
Wednesday
Mostly sunny, with a high near 30.
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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:
2:31 pm EST Jan 14, 2026
Forecast Valid:
8pm EST Jan 14, 2026-6pm EST Jan 21, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation