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

John Wayne-Orange County Airport (KSNA)

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

Clear

79°F

26°C

Humidity 57%
Wind Speed SW 9 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 01 Sep 12:35 PM PDT
Extended Forecast for

Costa Mesa CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 79. West wind around 10 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 65. West wind 5 to 10 mph becoming light and variable in the evening.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 66. West wind around 5 mph becoming southeast after midnight.

    Low: 66 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 78. Southeast wind 5 to 10 mph becoming southwest in the afternoon.

    High: 78 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers, mainly before 11am. Mostly sunny, with a high near 83.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 79. West wind around 10 mph.
Tonight
Mostly clear, with a low around 65. West wind 5 to 10 mph becoming light and variable in the evening.
Wednesday
Sunny, with a high near 79. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Increasing clouds, with a low around 66. West wind around 5 mph becoming southeast after midnight.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 78. Southeast wind 5 to 10 mph becoming southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 66.
Saturday
A chance of showers, mainly before 11am. Mostly sunny, with a high near 83.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 69.
Sunday
A chance of showers. Partly sunny, with a high near 85.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 70.
Labor Day
A slight chance of showers. Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Costa Mesa CA
 33.67°N 117.89°W (Elev. 13 ft)
Last Update:
11:24 am PDT Sep 1, 2026
Forecast Valid:
12pm PDT Sep 1, 2026-6pm PDT Sep 7, 2026
 
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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