10-Day Weather Forecast - Costa Mesa, CA

Partly cloudy with patchy fog in the morning.. becoming mostly sunny. Local visibility one quarter mile or less at times in the morning. Highs 80 to 84 at the beaches to 86 to 91 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 around 70. Areas of winds south 10 mph in the evening becoming light.

Partly cloudy with patchy fog in the morning.. becoming sunny. Local visibility one quarter mile or less at times in the morning. Highs 81 to 86 at the beaches to 88 to 93 farther inland and near higher coastal terrain. Areas of winds south to 10 mph.

Mostly clear in the evening..becoming partly cloudy. Lows around 70. Areas of winds south 10 mph in the evening becoming light.

Partly cloudy with patchy fog in the morning.. becoming mostly sunny. Local visibility one quarter mile or less at times in the morning. Highs 83 to 88 at the beaches to 89 to 94 farther inland and near higher coastal terrain.

Partly cloudy. Lows 70 to 74.

Partly cloudy. Highs 82 to 87 at the beaches to 89 to 94 farther inland and near higher coastal terrain.

Partly cloudy. Lows 69 to 72.

Partly cloudy in the morning..becoming mostly sunny. Highs 79 to 84 at the beaches to 86 to 91 farther inland and near higher coastal terrain.

Mostly clear. Lows around 70.

Partly cloudy in the morning..becoming mostly sunny. Highs 76 to 80 at the beaches to 82 to 87 farther inland and near higher coastal terrain.

Mostly clear in the evening..becoming partly cloudy. Lows 65 to 68.

Partly cloudy in the morning..becoming mostly sunny. Highs 75 to 79 at the beaches to 80 to 85 farther inland and near higher coastal terrain.

Clear. Low temperature around 64F. Dew point will be around 61F with an average humidity of 82%. Winds will be 6 mph from the S.

Sunny. High temperature around 76F. Dew point will be around 60F with an average humidity of 64%. Winds will be 7 mph from the SW.

Clear. Low temperature around 66F. Dew point will be around 61F with an average humidity of 79%. Winds will be 5 mph from the SW.

Sunny. High temperature around 78F. Dew point will be around 61F with an average humidity of 64%. Winds will be 7 mph from the SW.

Mostly clear. Low temperature around 67F. Dew point will be around 63F with an average humidity of 79%. Winds will be 5 mph from the SW.