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 65%
Wind Speed S 4 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 26 Aug 09:35 PM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory August 26, 09:51pm until August 28, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 26, 09:51pm until August 28, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 71 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 90 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 70. South wind around 5 mph becoming calm after midnight.

    Low: 70 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 89 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. Southwest wind around 5 mph becoming calm after midnight.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

Tonight
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 71. Calm wind becoming south around 5 mph.
Thursday
Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 70. South wind around 5 mph becoming calm after midnight.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 70. Southwest wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 87.
Saturday Night
Clear, with a low around 68.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 65.
Monday
Mostly sunny, with a high near 79.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 65.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 80.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 67.
Wednesday
A slight chance of showers. Partly sunny, with a high near 82.
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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:
11:36 am PDT Aug 26, 2026
Forecast Valid:
9pm PDT Aug 26, 2026-6pm PDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation