National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

80°F

27°C

Humidity 87%
Wind Speed W 6 mph
Barometer 30.12 in (1019.7 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 7 Aug 7:56 am EDT
Extended Forecast for

Patchogue NY

Heat Advisory August 7, 08:29am until August 8, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 7, 08:29am until August 8, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Today

    High: 86 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms. Patchy fog after 2am. Otherwise, increasing clouds, with a low around 75. Southwest wind 5 to 7 mph. Chance of precipitation is 40%.

    Low: 75 °F

    Chance
    T-storms and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 86. Heat index values as high as 96. Southwest wind 6 to 11 mph.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 75. Southwest wind 7 to 9 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 87. West wind 6 to 10 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 86. Heat index values as high as 96. Light west wind becoming southwest 5 to 10 mph in the morning.
Tonight
A chance of showers and thunderstorms. Patchy fog after 2am. Otherwise, increasing clouds, with a low around 75. Southwest wind 5 to 7 mph. Chance of precipitation is 40%.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 86. Heat index values as high as 96. Southwest wind 6 to 11 mph.
Saturday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 75. Southwest wind 7 to 9 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 87. West wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 76.
Tuesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 86.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 74.
Wednesday
Partly sunny, with a high near 82.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 72.
Thursday
Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Patchogue NY
 40.77°N 73°W (Elev. 43 ft)
Last Update:
2:51 am EDT Aug 7, 2026
Forecast Valid:
8am EDT Aug 7, 2026-6pm EDT Aug 13, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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