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

Overnight: Mostly clear, with a low around 69. Calm wind.
Mostly Clear

Thursday

Thursday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 83. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Patchy Fog
then Mostly
Sunny
Thursday
Night
Thursday Night: Partly cloudy, with a low around 69. South wind around 5 mph becoming calm  in the evening.
Partly Cloudy

Friday

Friday: Mostly sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Mostly Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 69. South wind around 5 mph becoming calm  in the evening.
Mostly Clear

Saturday

Saturday: Sunny, with a high near 84.
Sunny

Saturday
Night
Saturday Night: Mostly clear, with a low around 70.
Mostly Clear

Sunday

Sunday: Sunny, with a high near 84.
Sunny

Sunday
Night
Sunday Night: Mostly clear, with a low around 70.
Mostly Clear

Lo 69 °F Hi 83 °F Lo 69 °F Hi 84 °F Lo 69 °F Hi 84 °F Lo 70 °F Hi 84 °F Lo 70 °F

 

Overnight
 
Mostly clear, with a low around 69. Calm wind.
Thursday
 
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 83. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Thursday Night
 
Partly cloudy, with a low around 69. South wind around 5 mph becoming calm in the evening.
Friday
 
Mostly sunny, with a high near 84. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Friday Night
 
Mostly clear, with a low around 69. South wind around 5 mph becoming calm in the evening.
Saturday
 
Sunny, with a high near 84.
Saturday Night
 
Mostly clear, with a low around 70.
Sunday
 
Sunny, with a high near 84.
Sunday Night
 
Mostly clear, with a low around 70.
Monday
 
Sunny, with a high near 86.
Monday Night
 
Mostly clear, with a low around 70.
Tuesday
 
Sunny, with a high near 87.
Tuesday Night
 
Mostly clear, with a low around 71.
Wednesday
 
Sunny, with a high near 86.

 

Forecast from NOAA-NWS for Westminster CA.