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

28°F

-2°C

Humidity 26%
Wind Speed Calm
Barometer 30.63 in (1037.5 mb)
Dewpoint -3°F (-19°C)
Visibility 10.00 mi
Last update 2 Mar 12:56 pm EST
Extended Forecast for

Hauppauge NY

  • This Afternoon

    This Afternoon: Mostly cloudy, then gradually becoming sunny, with a high near 30. Wind chill values between 25 and 30. North wind around 5 mph becoming calm.

    High: 30 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Increasing clouds, with a low around 21. Calm wind.

    Low: 21 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain likely, possibly mixed with snow before 1pm, then rain. High near 39. East wind 3 to 7 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 39 °F

    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain. Low around 36. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Rain

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 45. Light and variable wind.

    High: 45 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after 1am. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: A 40 percent chance of rain before 1pm. Cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain, mainly after 1am. Low around 36. Chance of precipitation is 80%.

    Low: 36 °F

    Chance Rain
    then Rain

  • Friday

    Friday: A 50 percent chance of rain before 1pm. Cloudy, with a high near 44.

    High: 44 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly cloudy, then gradually becoming sunny, with a high near 30. Wind chill values between 25 and 30. North wind around 5 mph becoming calm.
Tonight
Increasing clouds, with a low around 21. Calm wind.
Tuesday
Rain likely, possibly mixed with snow before 1pm, then rain. High near 39. East wind 3 to 7 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Tuesday Night
Rain. Low around 36. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 45. Light and variable wind.
Wednesday Night
A 40 percent chance of rain after 1am. Mostly cloudy, with a low around 35.
Thursday
A 40 percent chance of rain before 1pm. Cloudy, with a high near 45.
Thursday Night
Rain, mainly after 1am. Low around 36. Chance of precipitation is 80%.
Friday
A 50 percent chance of rain before 1pm. Cloudy, with a high near 44.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Mostly cloudy, with a high near 49.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 42.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 56.
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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:
1:04 pm EST Mar 2, 2026
Forecast Valid:
1pm EST Mar 2, 2026-6pm EDT Mar 8, 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