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

99°F

37°C

Humidity 32%
Wind Speed NNW 6 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 08 Sep 01:35 PM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory September 9, 08:00pm until September 10, 08:00pm
High Surf Advisory September 8, 01:53pm until September 8, 11:00pm
Coastal Flood Advisory September 8, 01:53pm until September 8, 11:00pm
Extreme Heat Warning September 8, 01:53pm until September 9, 08:00pm
Click here for hazard details and duration
Heat Advisory
High Surf Advisory
Coastal Flood Advisory
Extreme Heat Warning
  •  
    High Surf Advisory September 8, 01:53pm until September 8, 11:00pm
    Coastal Flood Advisory September 8, 01:53pm until September 8, 11:00pm
    Extreme Heat Warning September 8, 01:53pm until September 9, 08:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 74. West wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Light west wind becoming southwest 5 to 10 mph in the afternoon.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73. Southwest wind around 5 mph becoming southeast after midnight.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Southeast wind 5 to 10 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

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

    Low: 67 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 91. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 74. West wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92. Light west wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 73. Southwest wind around 5 mph becoming southeast after midnight.
Thursday
Sunny, with a high near 86. Southeast wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 67.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Sunny, with a high near 79.
Sunday Night
Clear, with a low around 65.
Monday
Sunny, with a high near 79.
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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:
12:25 pm PDT Sep 8, 2026
Forecast Valid:
1pm PDT Sep 8, 2026-6pm PDT Sep 14, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation