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

66°F

19°C

Humidity 88%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 20 Mar 12:20 AM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory March 20, 12:40am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 20, 12:40am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Light northwest wind becoming southwest 5 to 10 mph in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. West wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 79. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 79 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 78.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

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

    Low: 57 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 79.

    High: 79 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 58. Calm wind.
Friday
Sunny, with a high near 85. Light northwest wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, 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 79. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Saturday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 78.
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 79.
Monday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57.
Tuesday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Patchy fog. Otherwise, mostly sunny, with a high near 81.
Wednesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 57.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 82.
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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:
11:14 am PDT Mar 19, 2026
Forecast Valid:
12am PDT Mar 20, 2026-6pm PDT Mar 26, 2026
 
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