10-Day Weather Forecast - Costa Mesa, CA

Mostly sunny. Highs 72 to 75 at the beaches to 76 to 79 farther inland and near higher coastal terrain. Light winds.

Mostly clear. Lows around 54. Light winds becoming northeast 10 mph overnight.

Mostly sunny. Highs 73 to 78. Areas of winds northeast 10 mph in the morning becoming light.

Mostly clear in the evening. . . Becoming partly cloudy. Lows around 54. Light winds.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 72 to 77.

Mostly clear. Lows around 55.

Mostly sunny. Highs around 73 at the beaches to 75 to 78 farther inland and near higher coastal terrain.

Partly cloudy. Lows around 54.

Partly cloudy. Highs 71 to 74 at the beaches to 75 farther inland and near higher coastal terrain.

Partly cloudy in the evening. . . Becoming mostly clear. Lows around 54.

Partly cloudy. Highs 69 to 72 at the beaches to 73 farther inland and near higher coastal terrain.

Partly cloudy. Lows around 54.

Partly cloudy. Highs around 68 at the beaches to 69 to 72 farther inland and near higher coastal terrain.

Partly cloudy. Low temperature around 52F. Dew point will be around 46F with an average humidity of 66%. Winds will be 4 mph from the S.

Mostly sunny. High temperature around 63F. Dew point will be around 48F with an average humidity of 66%. Winds will be 5 mph from the S.

Partly cloudy. Low temperature around 48F. Dew point will be around 49F with an average humidity of 87%. Winds will be 6 mph from the S.

Cloudy. High temperature around 60F. Dew point will be around 49F with an average humidity of 75%. Winds will be 6 mph from the SW.

Partly cloudy. Low temperature around 46F. Dew point will be around 46F with an average humidity of 84%. Winds will be 4 mph from the SW.