Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

85°F

29°C

Humidity 75%
Wind Speed SW 15 G 24 mph
Barometer 29.86 in (1010.9 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 17 Jul 11:56 am EDT
Extended Forecast for

Hauppauge NY

Heat Advisory July 17, 12:23pm until July 17, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 17, 12:23pm until July 17, 10:00pm

    NOW until 10:00pm Thu

    Heat Advisory

  • This Afternoon

    High: 90 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 73. Northwest wind 10 to 13 mph.

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 84. Northwest wind 8 to 10 mph.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68. North wind 3 to 5 mph.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers after 2pm.  Mostly sunny, with a high near 84. Light and variable wind becoming south 5 to 8 mph in the morning.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm, mainly after 2am.  Mostly cloudy, with a low around 72. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am.  Partly sunny, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms before 2pm. Mostly sunny, with a high near 90. Heat index values as high as 101. Southwest wind around 15 mph.
Tonight
Mostly clear, with a low around 73. Northwest wind 10 to 13 mph.
Friday
Mostly sunny, with a high near 84. Northwest wind 8 to 10 mph.
Friday Night
Mostly clear, with a low around 68. North wind 3 to 5 mph.
Saturday
A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 84. Light and variable wind becoming south 5 to 8 mph in the morning.
Saturday Night
Showers likely and possibly a thunderstorm, mainly after 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
Hauppauge NY
 40.82°N 73.2°W (Elev. 197 ft)
6:08 am EDT Jul 17, 2025
12pm EDT Jul 17, 2025-6pm EDT Jul 23, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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