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

75°F

24°C

Humidity 47%
Wind Speed S 3 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 17 Oct 11:55 PM PDT
Extended Forecast for

Costa Mesa CA

  • Overnight

    Overnight: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. West wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 62. Southwest wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 76.

    High: 76 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 11pm. Partly cloudy, with a low around 61. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 74.

    High: 74 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 66. Calm wind.
Sunday
Sunny, with a high near 84. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 64. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 62. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 76.
Tuesday Night
A slight chance of showers after 11pm. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 74.
Wednesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 59.
Thursday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 70.
Thursday Night
A chance of showers. Partly cloudy, with a low around 56.
Friday
Sunny, with a high near 71.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Costa Mesa CA
 33.67°N 117.92°W (Elev. 3 ft)
Last Update:
12:19 am PDT Oct 18, 2026
Forecast Valid:
12am PDT Oct 18, 2026-6pm PDT Oct 24, 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