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.

Partly Cloudy

82°F

28°C

Humidity 29%
Wind Speed SSW 6 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 Oct 12:53 PM PDT
Extended Forecast for

Costa Mesa CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. West wind 5 to 10 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 64. West wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Clear

  • Monday

    Monday: Patchy fog between 8am and 11am. Otherwise, sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 11pm. Otherwise, mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Patchy Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Partly sunny, with a high near 74. Chance of precipitation is 50%.

    High: 74 °F

    Chance Rain

  • Wednesday Night

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

    Low: 59 °F

    Showers

  • Thursday

    Thursday: Showers likely, mainly before 11am. Mostly cloudy, with a high near 70.

    High: 70 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 86. West wind 5 to 10 mph.
Tonight
Clear, with a low around 64. West wind around 5 mph becoming calm in the evening.
Monday
Patchy fog between 8am and 11am. Otherwise, sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 78. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
A chance of rain. Partly sunny, with a high near 74. Chance of precipitation is 50%.
Wednesday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 59.
Thursday
Showers likely, mainly before 11am. Mostly cloudy, with a high near 70.
Thursday Night
A chance of showers before 11pm. Partly cloudy, with a low around 57.
Friday
Sunny, with a high near 72.
Friday Night
Clear, with a low around 58.
Saturday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Costa Mesa CA
 33.69°N 117.92°W (Elev. 3 ft)
Last Update:
11:17 am PDT Oct 18, 2026
Forecast Valid:
1pm PDT Oct 18, 2026-6pm PDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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