| National Weather Service Forecast for:
Costa Mesa, CA Issued by: National Weather Service San Diego, CA |
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| Updated: Wed, 23-Sep-2026 1:36pm PDT | ||||||||||||||||||||||||||||||||||||||||
| Costa Mesa | ||||||||||||||||||||||||||||||||||||||||
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| This Afternoon |
Sunny, with a high near 83. Southwest wind around 5 mph. |
| Tonight |
Partly cloudy, with a low around 67. South wind 0 to 5 mph. |
| Thursday |
Mostly sunny, with a high near 85. Southwest wind 0 to 10 mph. |
| Thursday Night |
Partly cloudy, with a low around 68. Southwest wind 0 to 5 mph. |
| Friday |
Mostly sunny, with a high near 87. West wind 0 to 10 mph. |
| Friday Night |
Mostly cloudy, with a low around 69. |
| Saturday |
Mostly sunny, with a high near 88. |
| Saturday Night |
Mostly cloudy, with a low around 70. |
| Sunday |
Mostly sunny, with a high near 83. |
| Sunday Night |
A slight chance of rain showers between 11pm and 5am. Partly cloudy, with a low around 67. |
| Monday |
Sunny, with a high near 81. |
| Monday Night |
Mostly clear, with a low around 67. |
| Tuesday |
Sunny, with a high near 86. |
| Tuesday Night |
Mostly clear, with a low around 69. |
Forecast from NOAA-NWS for Costa Mesa, CA.