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.

Mostly Cloudy

82°F

28°C

Humidity 69%
Wind Speed SSW 4 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 27 Aug 10:00 AM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory August 27, 10:18am until August 28, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 27, 10:18am until August 28, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 90. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm after midnight.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, sunny, with a high near 88. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy fog before 11am. Otherwise, sunny, with a high near 84.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Today
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 90. Southwest wind 5 to 10 mph.
Tonight
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 90. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm after midnight.
Saturday
Patchy fog before 11am. Otherwise, sunny, with a high near 88. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Patchy fog before 11am. Otherwise, sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 67.
Monday
Mostly sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 66.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 80.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 67.
Wednesday
A slight chance of showers. Partly sunny, with a high near 81.
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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:
12:59 am PDT Aug 27, 2026
Forecast Valid:
10am PDT Aug 27, 2026-6pm PDT Sep 2, 2026
 
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Additional Resources

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