10-Day Weather Forecast - Costa Mesa, CA

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 74 to 78 at the beaches to 79 to 84 farther inland and near higher coastal terrain. Light winds becoming southwest 10 mph in the afternoon.

Mostly clear in the evening. . . Becoming partly cloudy. Lows 54 to 57. Light winds.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 71 to 74 at the beaches to 76 to 79 farther inland and near higher coastal terrain. Light winds becoming west 10 mph in the afternoon.

Mostly clear in the evening. . . Becoming partly cloudy overnight with patchy fog. Lows around 53. Areas of winds west 10 mph in the evening becoming light.

Patchy fog in the morning. Partly cloudy. Highs 65 to 70.

Mostly clear in the evening. . . Becoming partly cloudy overnight with patchy fog. Lows 49 to 52.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 67 to 72.

Mostly clear. Lows 50 to 53.

Partly cloudy. Highs 68 to 73.

Partly cloudy. Lows around 51.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 68 to 73.

Clear. Lows around 53.

Mostly sunny. Highs 71 to 76.

Clear. Low temperature around 53F. Dew point will be around 42F with an average humidity of 55%. Winds will be 5 mph from the N.

Sunny. High temperature around 71F. Dew point will be around 41F with an average humidity of 39%. Winds will be 3 mph from the NW.

Clear. Low temperature around 54F. Dew point will be around 45F with an average humidity of 61%. Winds will be 1 mph from the NE.

Mostly sunny. High temperature around 70F. Dew point will be around 45F with an average humidity of 47%. Winds will be 3 mph from the W.

Mostly clear. Low temperature around 52F. Dew point will be around 48F with an average humidity of 72%. Winds will be 3 mph from the SW.