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

31°F

-1°C

Humidity 69%
Wind Speed NE 3 mph
Barometer 30.39 in (1029.2 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 15 Mar 3:56 am EDT
Extended Forecast for

Hauppauge NY

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 48. Light and variable wind becoming southeast 5 to 10 mph in the morning.

    High: 48 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 5am. Patchy fog after 2am. Temperature falling to near 40 by 8pm, then rising to around 48 during the remainder of the night. Southeast wind 7 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 40 °F⇑

    Slight Chance
    Showers then
    Showers and
    Patchy Fog

  • Monday

    Monday: Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 57. Breezy, with a south wind 16 to 21 mph, with gusts as high as 41 mph. Chance of precipitation is 50%.

    High: 57 °F

    Intermittent
    T-storms and
    Patchy Fog

  • Monday Night

    Monday Night: Periods of showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 35. Breezy, with a south wind 18 to 23 mph becoming west after midnight. Winds could gust as high as 49 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 35 °F

    Heavy Rain
    and Breezy

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a steady temperature around 38. West wind 14 to 16 mph, with gusts as high as 28 mph.

    High: 38 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 37.

    High: 37 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 48. Light and variable wind becoming southeast 5 to 10 mph in the morning.
Tonight
Showers, with thunderstorms also possible after 5am. Patchy fog after 2am. Temperature falling to near 40 by 8pm, then rising to around 48 during the remainder of the night. Southeast wind 7 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 57. Breezy, with a south wind 16 to 21 mph, with gusts as high as 41 mph. Chance of precipitation is 50%.
Monday Night
Periods of showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 35. Breezy, with a south wind 18 to 23 mph becoming west after midnight. Winds could gust as high as 49 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a steady temperature around 38. West wind 14 to 16 mph, with gusts as high as 28 mph.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Increasing clouds, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Partly sunny, with a high near 45.
Thursday Night
Mostly cloudy, with a low around 33.
Friday
Mostly sunny, with a high near 49.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 35.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 49.
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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:
3:46 am EDT Mar 15, 2026
Forecast Valid:
4am EDT Mar 15, 2026-6pm EDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation