National Weather Service Forecast for: Costa Mesa CA
Issued by: National Weather Service San Diego, CA
Updated: 2:23 am PDT Jun 30, 2026
 
Today

Today: Cloudy through mid morning, then gradual clearing, with a high near 72. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Gradual
Clearing
 Tonight

Tonight: Increasing clouds, with a low around 60. West wind 5 to 10 mph becoming light after midnight.
Increasing
Clouds
 Wednesday

Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 72. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Gradual
Clearing
 Wednesday
Night
Wednesday Night: Increasing clouds, with a low around 59. Southwest wind 5 to 10 mph becoming light in the evening.
Increasing
Clouds
 Thursday

Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 73. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Decreasing
Clouds
 Thursday
Night
Thursday Night: Increasing clouds, with a low around 61.
Increasing
Clouds
 Friday

Friday: Mostly cloudy, then gradually becoming sunny, with a high near 74.
Decreasing
Clouds
 Friday
Night
Friday Night: Partly cloudy, with a low around 61.
Partly Cloudy
 Independence
Day
Independence Day: Mostly sunny, with a high near 74.
Mostly Sunny
Hi 72 °F Lo 60 °F Hi 72 °F Lo 59 °F Hi 73 °F Lo 61 °F Hi 74 °F Lo 61 °F Hi 74 °F

 

Today
 
 Cloudy through mid morning, then gradual clearing, with a high near 72. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Tonight
 
 Increasing clouds, with a low around 60. West wind 5 to 10 mph becoming light after midnight.
Wednesday
 
 Cloudy through mid morning, then gradual clearing, with a high near 72. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
 
 Increasing clouds, with a low around 59. Southwest wind 5 to 10 mph becoming light in the evening.
Thursday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 73. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
 
 Increasing clouds, with a low around 61.
Friday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 74.
Friday Night
 
 Partly cloudy, with a low around 61.
Independence Day
 
 Mostly sunny, with a high near 74.
Saturday Night
 
 Partly cloudy, with a low around 62.
Sunday
 
 Mostly sunny, with a high near 74.
Sunday Night
 
 Increasing clouds, with a low around 63.
Monday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 74.

 

Forecast from NOAA-NWS for Costa Mesa CA.