10-Day Weather Forecast - Costa Mesa, CA

Partly cloudy this morning. . . Becoming mostly sunny. Highs around 70 at the beaches to 71 to 74 farther inland and near higher coastal terrain. Light winds.

Mostly clear in the evening. . . Becoming partly cloudy. Lows around 51. Light winds.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs around 70 at the beaches to 71 to 74 farther inland and near higher coastal terrain. Light winds.

Partly cloudy. Lows around 51. Light winds.

Mostly cloudy. Highs around 66 at the beaches to 70 farther inland and near higher coastal terrain. Light winds.

Mostly cloudy. Patchy fog overnight. Lows around 52.

Cloudy in the morning. . . Becoming mostly cloudy. Patchy fog in the morning. Highs 64 to 67.

Partly cloudy in the evening. . . Becoming mostly cloudy overnight with patchy fog. Lows around 50.

Mostly cloudy with patchy fog in the morning. . . Becoming partly cloudy. Highs around 63 at the beaches to 64 to 67 farther inland and near higher coastal terrain.

Partly cloudy. Lows around 51.

Patchy fog in the morning. Partly cloudy. Highs 65 to 69.

Mostly clear. Lows around 51.

Partly cloudy. Highs around 70.

Mostly clear. Low temperature around 50F. Dew point will be around 49F with an average humidity of 82%. Winds will be 2 mph from the W.

Partly cloudy. High temperature around 66F. Dew point will be around 46F with an average humidity of 57%. Winds will be 3 mph from the W.

Mostly clear. Low temperature around 50F. Dew point will be around 48F with an average humidity of 78%. Winds will be 2 mph from the E.

Partly cloudy. High temperature around 67F. Dew point will be around 45F with an average humidity of 53%. Winds will be 3 mph from the W.

Partly cloudy. Low temperature around 51F. Dew point will be around 48F with an average humidity of 75%. Winds will be 2 mph from the E.