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City of Costa Mesa, CaliforniaCosta Mesa, CA 7-Day Night Weather Forecast
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Costa Mesa, CA Weather Forecast
Costa Mesa, CA Weather Forecast Date: 1210 AM PDT Sat Sep 12 2026
The area/counties/county of: Orange County Coastal Areas, including the cities of: Huntington Beach, Costa Mesa, Newport Beach, Laguna Beach, and San Clemente.or toggle through each period.
Today... Partly cloudy with patchy fog this morning...Becoming mostly sunny. Highs around 80 at The beaches to 83 to 86 farther inland and near higher coastal terrain. Areas of winds south 10 mph.
Tonight... Partly cloudy in the evening...Becoming mostly cloudy overnight with patchy fog. Lows 65 to 68. Areas of winds southwest 10 mph in the evening becoming light.
Sunday... Partly cloudy with patchy fog in the morning...Becoming mostly sunny. Highs 75 to 78 at The beaches to 80 to 84 farther inland and near higher coastal terrain. Light winds becoming southwest 10 mph in the afternoon.
Sunday Night... Mostly clear in the evening...Becoming partly cloudy overnight with patchy fog. Lows 63 to 67. Areas of winds southwest 10 mph becoming southeast overnight.
Monday... Partly cloudy with patchy fog in the morning...Becoming mostly sunny. Highs 74 to 77 at The beaches to 78 to 82 farther inland and near higher coastal terrain. Areas of winds south 10 mph.
Monday Night... Mostly clear in the evening...Becoming partly cloudy overnight with patchy fog. Lows 61 to 66.
Tuesday... Partly cloudy with patchy fog in the morning... Becoming mostly sunny. Highs 72 to 75 at The beaches to 76 to 80 farther inland and near higher coastal terrain.
Tuesday Night... Mostly clear in the evening...Becoming partly cloudy. Lows 60 to 64.
Wednesday... Partly cloudy. Highs around 74 at The beaches to 76 to 81 farther inland and near higher coastal terrain.
Wednesday Night... Mostly clear. Lows 60 to 65.
Thursday... Partly cloudy in the morning...Becoming mostly sunny. Highs 75 to 79 at The beaches to 80 to 84 farther inland and near higher coastal terrain.
Thursday Night... Mostly clear. Lows 63 to 67.
POP = Probability of Precipitation
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