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.

Overcast

43°F

6°C

Humidity 71%
Wind Speed SW 14 G 23 mph
Barometer 30.39 in (1029.1 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 29 Mar 11:56 pm EDT
Extended Forecast for

Hauppauge NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 41. Southwest wind 11 to 13 mph.

    Low: 41 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers after 2pm. Partly sunny, with a high near 58. Southwest wind 14 to 18 mph.

    High: 58 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers before 8pm, then a chance of rain after 2am. Mostly cloudy, with a low around 48. Southwest wind 7 to 11 mph. Chance of precipitation is 30%.

    Low: 48 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain before 2pm. Partly sunny, with a high near 62. Southwest wind 8 to 13 mph.

    High: 62 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 51. South wind 11 to 14 mph.

    Low: 51 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely after 2pm. Partly sunny, with a high near 67. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Partly Sunny
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: Rain likely and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms after 2am. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.

    Low: 45 °F

    Rain Likely

  • Thursday

    Thursday: A 40 percent chance of rain. Cloudy, with a high near 54.

    High: 54 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 41. Southwest wind 11 to 13 mph.
Monday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 58. Southwest wind 14 to 18 mph.
Monday Night
A slight chance of showers before 8pm, then a chance of rain after 2am. Mostly cloudy, with a low around 48. Southwest wind 7 to 11 mph. Chance of precipitation is 30%.
Tuesday
A 30 percent chance of rain before 2pm. Partly sunny, with a high near 62. Southwest wind 8 to 13 mph.
Tuesday Night
Mostly cloudy, with a low around 51. South wind 11 to 14 mph.
Wednesday
Rain likely after 2pm. Partly sunny, with a high near 67. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain likely and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms after 2am. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 54.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 41.
Friday
A 40 percent chance of rain. Cloudy, with a high near 55.
Friday Night
A 50 percent chance of rain. Cloudy, with a low around 40.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 52.
Saturday Night
A 40 percent chance of rain. Cloudy, with a low around 40.
Sunday
A 50 percent chance of rain. Cloudy, with a high near 58.
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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:
7:43 pm EDT Mar 29, 2026
Forecast Valid:
12am EDT Mar 30, 2026-6pm EDT Apr 5, 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