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

82°F

28°C

Humidity 58%
Wind Speed N 0 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 09 Sep 01:05 AM PDT
Extended Forecast for

Costa Mesa CA

Heat Advisory September 9, 08:00pm until September 10, 08:00pm
Coastal Flood Advisory September 9, 01:23am until September 9, 11:00pm
Extreme Heat Warning September 9, 01:23am until September 9, 08:00pm
Click here for hazard details and duration
Heat Advisory
Coastal Flood Advisory
Extreme Heat Warning
  •  
    Coastal Flood Advisory September 9, 01:23am until September 9, 11:00pm
    Extreme Heat Warning September 9, 01:23am until September 9, 08:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Light west wind becoming southwest 5 to 10 mph in the afternoon.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73. South wind around 5 mph.

    Low: 73 °F

    Mostly Clear

  • Thursday

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

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 70. Southeast wind 5 to 10 mph.

    Low: 70 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 74. Calm wind.
Wednesday
Sunny, with a high near 94. Light west wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 73. South wind around 5 mph.
Thursday
Sunny, with a high near 88. Light southeast wind becoming south 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 70. Southeast wind 5 to 10 mph.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 68.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Sunny, with a high near 80.
Sunday Night
Clear, with a low around 65.
Monday
Sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 79.
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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:
12:25 pm PDT Sep 8, 2026
Forecast Valid:
1am PDT Sep 9, 2026-6pm PDT Sep 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation