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.

A Few Clouds

49°F

9°C

Humidity 41%
Wind Speed NE 3 mph
Barometer 30.18 in (1021.9 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 20 Nov 2:56 pm EST
Extended Forecast for

Hauppauge NY

  • Tonight

    Tonight: Areas of frost after 9pm. Otherwise, increasing clouds, with a low around 34. Calm wind.

    Low: 34 °F

    Areas Frost

  • Friday

    Friday: Mostly cloudy, with a high near 52. Calm wind becoming southwest 5 to 9 mph in the morning.

    High: 52 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Rain likely, mainly after 1am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 41. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Rain Likely
    and Patchy
    Fog

  • Saturday

    Saturday: A 30 percent chance of rain before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 50. North wind 6 to 10 mph.

    High: 50 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. North wind 5 to 7 mph.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Areas of frost after 9pm. Otherwise, increasing clouds, with a low around 34. Calm wind.
Friday
Mostly cloudy, with a high near 52. Calm wind becoming southwest 5 to 9 mph in the morning.
Friday Night
Rain likely, mainly after 1am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 41. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 30 percent chance of rain before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 50. North wind 6 to 10 mph.
Saturday Night
Partly cloudy, with a low around 31. North wind 5 to 7 mph.
Sunday
Mostly sunny, with a high near 48.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Sunny, with a high near 52.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
A 30 percent chance of rain after 1pm. Cloudy, with a high near 55.
Tuesday Night
Rain. Low around 47. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 59.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 42.
Thanksgiving Day
Mostly sunny, with a high near 52.
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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:
12:38 pm EST Nov 20, 2025
Forecast Valid:
3pm EST Nov 20, 2025-6pm EST Nov 27, 2025
 
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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