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.

Clear

67°F

19°C

Humidity 70%
Wind Speed N 0 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 19 Mar 02:53 AM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory March 19, 03:03am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 19, 03:03am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 58 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm after midnight.

    Low: 58 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, sunny, with a high near 84. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57. West wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 78.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 57.

    Low: 57 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 77.

    High: 77 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Overnight
Patchy fog. Otherwise, partly cloudy, with a low around 58. Calm wind.
Thursday
Patchy fog before 11am. Otherwise, sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm after midnight.
Friday
Patchy fog before 11am. Otherwise, sunny, with a high near 84. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Friday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57. West wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 78.
Saturday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 57.
Sunday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 77.
Sunday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57.
Monday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Monday Night
Patchy fog. Otherwise, mostly clear, with a low around 58.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 82.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 57.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Costa Mesa CA
 33.66°N 117.94°W (Elev. 7 ft)
Last Update:
1:34 am PDT Mar 19, 2026
Forecast Valid:
3am PDT Mar 19, 2026-6pm PDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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