| National Weather Service Forecast for:
Costa Mesa CA Issued by: National Weather Service San Diego, CA |
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| Updated: 1:34 am PDT Mar 19, 2026 | ||||||||||||||||||
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| Today |
Patchy fog before 11am. Otherwise, sunny, with a high near 87. Light west wind becoming southwest 5 to 10 mph in the afternoon. |
| Tonight |
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 59. Southwest wind around 5 mph becoming calm after midnight. |
| Friday |
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Light southwest wind increasing to 5 to 10 mph in the afternoon. |
| Friday Night |
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm after midnight. |
| Saturday |
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81. Light southwest wind increasing to 5 to 10 mph in the afternoon. |
| Saturday Night |
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 57. |
| Sunday |
Patchy fog before 11am. Otherwise, partly sunny, with a high near 80. |
| Sunday Night |
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57. |
| Monday |
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 83. |
| Monday Night |
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 58. |
| Tuesday |
Patchy fog. Otherwise, mostly sunny, with a high near 84. |
| Tuesday Night |
Patchy fog. Otherwise, partly cloudy, with a low around 57. |
| Wednesday |
Patchy fog. Otherwise, mostly sunny, with a high near 83. |
Forecast from NOAA-NWS for Costa Mesa CA.
