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

73°F

23°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 69°F (21°C)
Visibility 8.00 mi
Last update 25 Aug 06:53 AM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory August 25, 10:00am until August 28, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Patchy fog before 11am. Otherwise, sunny, with a high near 90. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73. Southwest wind around 5 mph becoming calm after midnight.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 94. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 94 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 74.

    Low: 74 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 95.

    High: 95 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 11am. Otherwise, sunny, with a high near 90. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tonight
Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 91. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
Mostly clear, with a low around 73. Southwest wind around 5 mph becoming calm after midnight.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 94. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 74.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 95.
Friday Night
Partly cloudy, with a low around 73.
Saturday
Sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 83.
Sunday Night
Mostly clear, with a low around 68.
Monday
Sunny, with a high near 81.
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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:
3:55 am PDT Aug 25, 2026
Forecast Valid:
7am PDT Aug 25, 2026-6pm PDT Aug 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation