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 N 0 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 09 Sep 03:35 AM PDT
Extended Forecast for

Irvine CA

Heat Advisory September 9, 08:00pm until September 10, 08:00pm
Extreme Heat Warning September 9, 03:46am until September 9, 08:00pm
Click here for hazard details and duration
Heat Advisory
Extreme Heat Warning
  •  
    Extreme Heat Warning September 9, 03:46am until September 9, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • Overnight

    Low: 77 °F

    Slight Chance
    Sprinkles

  • Wednesday

    Wednesday: Sunny, with a high near 105. Heat index values as high as 117. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 105 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 76. West wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 93. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. Southeast wind around 5 mph.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 11pm. Otherwise, mostly clear, with a low around 67.

    Low: 67 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 83.

    High: 83 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Overnight
A slight chance of sprinkles. Mostly clear, with a low around 77. Calm wind.
Wednesday
Sunny, with a high near 105. Heat index values as high as 117. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 76. West wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 93. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 72. Southeast wind around 5 mph.
Friday
Sunny, with a high near 87.
Friday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 67.
Saturday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 64.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Irvine CA
 33.68°N 117.81°W (Elev. 56 ft)
Last Update:
1:36 am PDT Sep 9, 2026
Forecast Valid:
3am PDT Sep 9, 2026-6pm PDT Sep 15, 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