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

Hazardous Weather Conditions

Current conditions at

John Wayne-Orange County Airport (KSNA)

Lat: 33.6798°NLon: 117.8674°WElev: 39.0ft.

Clear

79°F

26°C

Humidity 74%
Wind Speed SW 6 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 70°F (21°C)
Visibility 9.00 mi
Heat Index82°F (28°C)
Last update 29 Aug 07:05 PM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory August 29, 07:17pm until August 29, 08:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory August 29, 07:17pm until August 29, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84. East wind 5 to 10 mph becoming southwest in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 68. Southwest wind around 5 mph becoming calm after midnight.

    Low: 68 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 81 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. West wind 5 to 10 mph becoming light and variable after midnight.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers after 11am. Mostly sunny, with a high near 81. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 70. West wind around 5 mph becoming southeast after midnight.
Sunday
Sunny, with a high near 84. East wind 5 to 10 mph becoming southwest in the afternoon.
Sunday Night
Increasing clouds, with a low around 68. Southwest wind around 5 mph becoming calm after midnight.
Monday
Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 66. West wind 5 to 10 mph becoming light and variable after midnight.
Tuesday
A slight chance of showers after 11am. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 67.
Friday
Mostly sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 68.
Saturday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Costa Mesa CA
 33.67°N 117.92°W (Elev. 3 ft)
Last Update:
12:02 pm PDT Aug 29, 2026
Forecast Valid:
7pm PDT Aug 29, 2026-6pm PDT Sep 5, 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