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

88°F

31°C

Humidity 52%
Wind Speed SSW 10 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 24 Aug 12:20 PM 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

  • This Afternoon

    This Afternoon: Sunny, with a high near 85. Southwest wind 5 to 10 mph.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 68. Southwest wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 11am. Otherwise, sunny, with a high near 86. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm after midnight.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Thursday Night

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

    Low: 73 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 85. Southwest wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 68. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Patchy fog before 11am. Otherwise, sunny, with a high near 86. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 88. Light south wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 73.
Friday
Mostly sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 72.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Costa Mesa CA
 33.67°N 117.92°W (Elev. 3 ft)
Last Update:
11:49 am PDT Aug 24, 2026
Forecast Valid:
12pm PDT Aug 24, 2026-6pm PDT Aug 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation