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National Weather Service Forecast for: Costa Mesa, CA
Issued by: National Weather Service San Diego, CA
Updated: Thu, 12-Mar-2026 12:13pm PDT

Costa Mesa
 
  Friday

Friday: Sunny
Sunny
Saturday

Saturday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Sunday

Sunday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Monday

Monday: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
  Hi 88 °F Hi 81 °F Hi 82 °F Hi 88 °F Hi 89 °F Hi 88 °F Hi 88 °F
 
Tonight

Tonight: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Patchy Fog
Patchy Fog
Saturday
Night
Saturday Night: Partly Cloudy then Patchy Fog
Partly Cloudy then Patchy Fog
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
 
Lo 59 °F Lo 57 °F Lo 52 °F Lo 54 °F Lo 57 °F Lo 57 °F Lo 56 °F  

 

Tonight
 
 Mostly clear, with a low around 59. Southwest wind 0 to 10 mph.
Friday
 
 Sunny, with a high near 88. Southwest wind 0 to 5 mph.
Friday Night
 
 Patchy fog after 11pm. Mostly cloudy, with a low around 57. South wind 0 to 5 mph.
Saturday
 
 Patchy fog before 11am. Mostly sunny, with a high near 81. South wind 0 to 10 mph.
Saturday Night
 
 Patchy fog after 5am. Partly cloudy, with a low around 52. South wind 0 to 5 mph.
Sunday
 
 Patchy fog before 11am. Mostly sunny, with a high near 82.
Sunday Night
 
 Partly cloudy, with a low around 54.
Monday
 
 Mostly sunny, with a high near 88.
Monday Night
 
 Mostly clear, with a low around 57.
Tuesday
 
 Sunny, with a high near 89.
Tuesday Night
 
 Mostly clear, with a low around 57.
Wednesday
 
 Sunny, with a high near 88.
Wednesday Night
 
 Partly cloudy, with a low around 56.
Thursday
 
 Sunny, with a high near 88.

 

Forecast from NOAA-NWS for Costa Mesa, CA.