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.

Fair

49°F

9°C

Humidity 83%
Wind Speed Calm
Barometer 30.31 in (1026.4 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 10 Oct 3:56 am EDT
Extended Forecast for

Hauppauge NY

  • Today

    Today: Partly sunny, with a high near 66. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.

    High: 66 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 52. Light southeast wind.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain, mainly after 2pm. High near 65. Southeast wind 7 to 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 65 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain and possibly a thunderstorm. Low around 59. East wind 8 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 59 °F

    Rain

  • Columbus Day

    Columbus Day: Rain likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 68. North wind 9 to 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Rain Likely

  • Monday Night

    Monday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.

    Low: 54 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of showers before 8am. Partly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers then
    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 66. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 52. Light southeast wind.
Sunday
Rain, mainly after 2pm. High near 65. Southeast wind 7 to 11 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain and possibly a thunderstorm. Low around 59. East wind 8 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Columbus Day
Rain likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 68. North wind 9 to 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly clear, with a low around 56.
Tuesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 69.
Tuesday Night
A chance of showers before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers before 8am. Partly sunny, with a high near 64.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Sunny, with a high near 61.
Thursday Night
Mostly cloudy, with a low around 49.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 63.
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:
2:11 am EDT Oct 10, 2026
Forecast Valid:
4am EDT Oct 10, 2026-6pm EDT Oct 16, 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