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

45°F

7°C

Humidity 74%
Wind Speed SW 10 mph
Barometer 29.69 in (1005.5 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 14 Jan 8:56 am EST
Extended Forecast for

Hauppauge NY

  • Today

    Today: Cloudy, with a high near 48. Southwest wind 6 to 8 mph.

    High: 48 °F

    Cloudy

  • Tonight

    Tonight: A 50 percent chance of showers, mainly after 10pm. Cloudy, with a steady temperature around 42. Light and variable wind becoming west around 6 mph after midnight.

    Low: 42 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of rain and snow showers before 10am, then a slight chance of snow showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 29 by 5pm. Wind chill values between 20 and 30. West wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 39 °F⇓

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19. Wind chill values between 5 and 15. West wind 11 to 13 mph, with gusts as high as 30 mph.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 35. West wind 11 to 15 mph, with gusts as high as 30 mph.

    High: 35 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a steady temperature around 31.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, with a high near 48. Southwest wind 6 to 8 mph.
Tonight
A 50 percent chance of showers, mainly after 10pm. Cloudy, with a steady temperature around 42. Light and variable wind becoming west around 6 mph after midnight.
Thursday
A slight chance of rain and snow showers before 10am, then a slight chance of snow showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 29 by 5pm. Wind chill values between 20 and 30. West wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 19. Wind chill values between 5 and 15. West wind 11 to 13 mph, with gusts as high as 30 mph.
Friday
Mostly sunny, with a high near 35. West wind 11 to 15 mph, with gusts as high as 30 mph.
Friday Night
Mostly cloudy, with a steady temperature around 31.
Saturday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 26.
Sunday
Partly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 21.
M.L.King Day
Mostly sunny, with a high near 32.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 29.
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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:
6:04 am EST Jan 14, 2026
Forecast Valid:
9am EST Jan 14, 2026-6pm EST Jan 20, 2026
 
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