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City of Costa Mesa, CaliforniaCosta Mesa, CA 7-Day Weather Forecast
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Costa Mesa Weather Forecast
Costa Mesa, CA Weather Forecast Date: 1221 AM PDT Sun Sep 13 2026
Weather forecast for Costa Mesa, CA
Today Hi: 78°FHi: 26°C Lo: 66°F Lo: 19°C |
Today... Partly cloudy this morning...Becoming mostly sunny. Highs around 78 at The beaches to 80 to 84 farther inland and near higher coastal terrain. Light winds becoming southwest 10 mph this afternoon. |
| Mon Hi: 76°FHi: 24°C Lo: 64°F Lo: 18°C |
Monday... Partly cloudy in the morning...Becoming mostly sunny. Highs around 76 at The beaches to 78 to 82 farther inland and near higher coastal terrain. Areas of winds south 10 mph. |
| Tue Hi: 79°FHi: 26°C Lo: 63°F Lo: 17°C |
Tuesday... Partly cloudy in the morning...Becoming mostly sunny. Highs 76 to 81. Areas of winds south 10 mph. |
| Wed Hi: 77°FHi: 25°C Lo: 63°F Lo: 17°C |
Wednesday... Partly cloudy in the morning...Becoming mostly sunny. Highs around 77 at The beaches to 78 to 82 farther inland and near higher coastal terrain. |
| Thu Hi: 76°FHi: 24°C Lo: 64°F Lo: 18°C |
Thursday... Partly cloudy in the morning...Becoming mostly sunny. Highs 74 to 77 at The beaches to 77 to 82 farther inland and near higher coastal terrain. |
Fri Hi: 80°FHi: 27°C Lo: 66°F Lo: 19°C |
Friday... Mostly sunny. Highs around 80 at The beaches to 82 to 86 farther inland and near higher coastal terrain. |
| Sat Hi: 81°FHi: 27°C |
Saturday... Mostly sunny. Highs 79 to 83 at The beaches to 85 to 89 farther inland and near higher coastal terrain. |
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