10-Day Weather Forecast - Costa Mesa, CA

Mostly cloudy with patchy fog in the morning. . . Becoming partly cloudy. Highs around 64 at the beaches to 66 to 69 farther inland and near higher coastal terrain. Light winds.

Mostly cloudy. Patchy fog overnight. Lows 52 to 55. Light winds.

Cloudy. Patchy fog in the morning. A chance of showers in the afternoon. Highs 62 to 66. Areas of winds southeast 10 to 15 mph with gusts to 30 mph. Chance of measurable precipitation 40 percent.

Showers. Locally heavy rainfall possible overnight. Lows 55 to 58. Areas of winds southeast 15 to 25 mph with gusts to 40 mph.

Showers. A slight chance of thunderstorms in the afternoon. Locally heavy rainfall possible. Breezy. Highs around 64.

Showers and a slight chance of thunderstorms. Locally heavy rainfall possible. Lows around 55.

Showers. Locally heavy rainfall possible in the morning. Highs 62 to 66.

Showers. Lows around 53.

Showers. Highs 60 to 63.

Mostly cloudy in the evening. . . Becoming partly cloudy. A chance of showers. Lows around 49.

Partly cloudy with a chance of showers. Highs 60 to 64.

Partly cloudy. A chance of showers. Lows around 48.

Partly cloudy with a slight chance of showers. Highs 63 to 66.

Clear. Low temperature around 52F. Dew point will be around 40F with an average humidity of 58%. Winds will be 6 mph from the N.

Sunny. High temperature around 62F. Dew point will be around 43F with an average humidity of 53%. Winds will be 4 mph from the N.

Clear. Low temperature around 54F. Dew point will be around 40F with an average humidity of 54%. Winds will be 5 mph from the NE.

Sunny. High temperature around 64F. Dew point will be around 43F with an average humidity of 51%. Winds will be 3 mph from the NE.

Mostly clear. Low temperature around 56F. Dew point will be around 42F with an average humidity of 56%. Winds will be 3 mph from the NE.