National Weather Service Forecast for: Westminster CA
Issued by: National Weather Service San Diego, CA
Updated: 12:05 pm PDT Jul 12, 2026
 
Tonight

Tonight: Mostly cloudy, with a low around 67. Southwest wind 5 to 10 mph becoming light  in the evening.
Mostly Cloudy
Monday

Monday: Partly sunny, with a high near 80. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Partly Sunny
Monday
Night
Monday Night: Partly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm  after midnight.
Partly Cloudy
Tuesday

Tuesday: Mostly sunny, with a high near 84. Light southwest wind increasing to 5 to 10 mph in the morning.
Mostly Sunny
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 70. South wind around 5 mph.
Mostly Clear
Wednesday

Wednesday: Mostly sunny, with a high near 89.
Mostly Sunny
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 73.
Mostly Clear
Thursday

Thursday: Mostly sunny, with a high near 85.
Mostly Sunny
Thursday
Night
Thursday Night: Partly cloudy, with a low around 71.
Partly Cloudy
Lo 67 °F Hi 80 °F Lo 68 °F Hi 84 °F Lo 70 °F Hi 89 °F Lo 73 °F Hi 85 °F Lo 71 °F

Extreme Heat Watch
 

Tonight
 
Mostly cloudy, with a low around 67. Southwest wind 5 to 10 mph becoming light in the evening.
Monday
 
Partly sunny, with a high near 80. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Monday Night
 
Partly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm after midnight.
Tuesday
 
Mostly sunny, with a high near 84. Light southwest wind increasing to 5 to 10 mph in the morning.
Tuesday Night
 
Mostly clear, with a low around 70. South wind around 5 mph.
Wednesday
 
Mostly sunny, with a high near 89.
Wednesday Night
 
Mostly clear, with a low around 73.
Thursday
 
Mostly sunny, with a high near 85.
Thursday Night
 
Partly cloudy, with a low around 71.
Friday
 
Mostly sunny, with a high near 82.
Friday Night
 
A slight chance of showers. Partly cloudy, with a low around 70.
Saturday
 
A slight chance of showers. Partly sunny, with a high near 82.
Saturday Night
 
Partly cloudy, with a low around 70.
Sunday
 
Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Westminster CA.