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

46°F

8°C

Humidity 86%
Wind Speed S 15 G 26 mph
Barometer 30.03 in (1017.0 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 26 Mar 3:56 am EDT
Extended Forecast for

Hauppauge NY

  • Overnight

    Overnight: A 20 percent chance of rain. Cloudy, with a steady temperature around 44. South wind around 13 mph.

    Low: 44 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 61. Southwest wind around 14 mph.

    High: 61 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Showers, mainly after 11pm. Low around 45. South wind 9 to 18 mph becoming west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Showers
    Likely then
    Showers

  • Friday

    Friday: Showers likely, mainly before 8am. Cloudy, with a steady temperature around 48. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of rain before 11pm, then a chance of rain and snow between 11pm and 2am, then a chance of snow after 2am. Mostly cloudy, with a low around 30. Northeast wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 30 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of rain. Cloudy, with a steady temperature around 44. South wind around 13 mph.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 61. Southwest wind around 14 mph.
Thursday Night
Showers, mainly after 11pm. Low around 45. South wind 9 to 18 mph becoming west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers likely, mainly before 8am. Cloudy, with a steady temperature around 48. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of rain before 11pm, then a chance of rain and snow between 11pm and 2am, then a chance of snow after 2am. Mostly cloudy, with a low around 30. Northeast wind 3 to 6 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 46.
Sunday Night
Mostly cloudy, with a low around 37.
Monday
Mostly cloudy, with a high near 54.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 53.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 40.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 53.
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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:
2:21 am EDT Mar 26, 2026
Forecast Valid:
4am EDT Mar 26, 2026-6pm EDT Apr 1, 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