National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

CW5283 Foothill Ranch (C5283)

Lat: 33.685°NLon: 117.65583°WElev: 986.91ft.

NA

85°F

29°C

Humidity 44%
Wind Speed WNW 0 MPH
Barometer 29.72 in (1006.44 mb)
Dewpoint 61°F (16°C)
Visibility NA
Heat Index85°F (29°C)
Last update 26 Aug 07:40 PM PDT
Extended Forecast for

Lake Forest CA

Extreme Heat Warning August 26, 07:55pm until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 26, 07:55pm until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 72 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 100. Calm wind becoming west around 5 mph in the afternoon.

    High: 100 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Cloudy

  • Friday

    Friday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 99. Calm wind becoming west around 5 mph in the afternoon.

    High: 99 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm.

    Low: 71 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

Tonight
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 72. South wind around 5 mph becoming calm.
Thursday
Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 100. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 71. Calm wind.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 99. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 96.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 63.
Monday
Sunny, with a high near 86.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 63.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 87.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 66.
Wednesday
A slight chance of showers. Partly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Forest CA
 33.65°N 117.67°W (Elev. 722 ft)
Last Update:
11:36 am PDT Aug 26, 2026
Forecast Valid:
7pm PDT Aug 26, 2026-6pm PDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation