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

57°F

14°C

Humidity 74%
Wind Speed SE 4 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 27 Dec 06:53 PM PST
Extended Forecast for

Costa Mesa CA

  • Tonight

    Tonight: Mostly clear, with a low around 44. Calm wind becoming east around 5 mph.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65. North wind 5 to 10 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48. Northeast wind 5 to 10 mph.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Northeast wind 5 to 10 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 4am. Mostly cloudy, with a low around 51. Chance of precipitation is 10%.

    Low: 51 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, mainly after 10am. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 10pm. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 44. Calm wind becoming east around 5 mph.
Sunday
Sunny, with a high near 65. North wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 48. Northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 67. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 50. Northeast wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
A slight chance of showers after 4am. Mostly cloudy, with a low around 51. Chance of precipitation is 10%.
Wednesday
A chance of showers, mainly after 10am. Partly sunny, with a high near 66.
Wednesday Night
Showers likely, mainly after 10pm. Mostly cloudy, with a low around 54.
New Year's Day
Showers likely. Mostly cloudy, with a high near 66.
Thursday Night
Showers likely. Mostly cloudy, with a low around 54.
Friday
Showers likely. Partly sunny, with a high near 65.
Friday Night
A chance of showers. Mostly cloudy, with a low around 53.
Saturday
A chance of showers. Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Costa Mesa CA
 33.66°N 117.94°W (Elev. 7 ft)
Last Update:
1:15 pm PST Dec 27, 2025
Forecast Valid:
7pm PST Dec 27, 2025-6pm PST Jan 3, 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