National Weather Service Forecast for: Aliso Viejo CA
Issued by: National Weather Service San Diego, CA
Updated: 12:34 am PDT Aug 20, 2026
 
Overnight

Overnight: Patchy fog after 5am.  Otherwise, partly cloudy, with a low around 66. Calm wind.
Patchy Fog
Thursday

Thursday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Patchy Fog
then Sunny
Thursday
Night
Thursday Night: Mostly clear, with a low around 66. Southwest wind around 5 mph becoming calm.
Mostly Clear
Friday

Friday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 84. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Patchy Fog
then Sunny
Friday
Night
Friday Night: Mostly clear, with a low around 67. South wind around 5 mph becoming calm  in the evening.
Mostly Clear
Saturday

Saturday: Patchy fog before 11am.  Otherwise, sunny, with a high near 85.
Patchy Fog
then Sunny
Saturday
Night
Saturday Night: Mostly clear, with a low around 68.
Mostly Clear
Sunday

Sunday: Patchy fog before 11am.  Otherwise, sunny, with a high near 85.
Patchy Fog
then Sunny
Sunday
Night
Sunday Night: Mostly clear, with a low around 68.
Mostly Clear
Lo 66 °F Hi 84 °F Lo 66 °F Hi 84 °F Lo 67 °F Hi 85 °F Lo 68 °F Hi 85 °F Lo 68 °F

 

Overnight
 
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 66. Calm wind.
Thursday
 
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Thursday Night
 
Mostly clear, with a low around 66. Southwest wind around 5 mph becoming calm.
Friday
 
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 84. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
 
Mostly clear, with a low around 67. South wind around 5 mph becoming calm in the evening.
Saturday
 
Patchy fog before 11am. Otherwise, sunny, with a high near 85.
Saturday Night
 
Mostly clear, with a low around 68.
Sunday
 
Patchy fog before 11am. Otherwise, sunny, with a high near 85.
Sunday Night
 
Mostly clear, with a low around 68.
Monday
 
Sunny, with a high near 87.
Monday Night
 
Mostly clear, with a low around 68.
Tuesday
 
Sunny, with a high near 88.
Tuesday Night
 
Mostly clear, with a low around 69.
Wednesday
 
Sunny, with a high near 87.

 

Forecast from NOAA-NWS for Aliso Viejo CA.