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

46°F

8°C

Humidity 83%
Wind Speed SE 3 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 11 Mar 2:56 am EDT
Extended Forecast for

Hauppauge NY

  • Overnight

    Overnight: Partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers after 2pm. Increasing clouds, with a high near 66. South wind 5 to 11 mph.

    High: 66 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 5am. Areas of fog before 3am. Otherwise, mostly cloudy, with a low around 41. South wind around 11 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Chance
    Showers and
    Areas Fog

  • Thursday

    Thursday: Rain showers likely before 2pm, then a chance of rain and snow showers. Cloudy, with a temperature rising to near 53 by 10am, then falling to around 41 during the remainder of the day. Northwest wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 53 °F⇓

    Showers
    Likely then
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Northwest wind 6 to 8 mph.

    Low: 31 °F

    Decreasing
    Clouds

  • Friday

    Friday: Increasing clouds, with a high near 46.

    High: 46 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 36.

    Low: 36 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 44. Calm wind.
Wednesday
A 30 percent chance of showers after 2pm. Increasing clouds, with a high near 66. South wind 5 to 11 mph.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 5am. Areas of fog before 3am. Otherwise, mostly cloudy, with a low around 41. South wind around 11 mph, with gusts as high as 24 mph.
Thursday
Rain showers likely before 2pm, then a chance of rain and snow showers. Cloudy, with a temperature rising to near 53 by 10am, then falling to around 41 during the remainder of the day. Northwest wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Northwest wind 6 to 8 mph.
Friday
Increasing clouds, with a high near 46.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 36.
Saturday
Sunny, with a high near 48.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Cloudy, with a high near 49.
Sunday Night
Rain. Low around 40. Chance of precipitation is 80%.
Monday
Rain. High near 54. Chance of precipitation is 90%.
Monday Night
Rain likely. Mostly cloudy, with a low around 28. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 40.
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:
3:05 am EDT Mar 11, 2026
Forecast Valid:
3am EDT Mar 11, 2026-6pm EDT Mar 17, 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