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

81°F

27°C

Humidity 61%
Wind Speed SSW 12 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 10 Sep 01:05 AM PDT
Extended Forecast for

Costa Mesa CA

Extreme Heat Warning September 10, 01:28am until September 10, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 10, 01:28am until September 10, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • Overnight

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. South wind 5 to 10 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71. South wind 5 to 10 mph becoming light and variable after midnight.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. South wind 5 to 10 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 68. South wind around 5 mph.

    Low: 68 °F

    Patchy Fog

  • Saturday

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

    High: 79 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 65.

    Low: 65 °F

    Patchy Fog

  • Sunday

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

    High: 79 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 74. South wind around 5 mph becoming north.
Thursday
Sunny, with a high near 89. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 71. South wind 5 to 10 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 85. South wind 5 to 10 mph.
Friday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 68. South wind around 5 mph.
Saturday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 79.
Saturday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 65.
Sunday
Patchy fog before 11am. Otherwise, sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 64.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 78.
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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:
1:14 am PDT Sep 10, 2026
Forecast Valid:
1am PDT Sep 10, 2026-6pm PDT Sep 16, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation