World > North America > United States > California > Costa Mesa   Costa Mesa, California Weather City of Costa Mesa, California

Costa Mesa, CA Weather Forecast

Feedback E-mail the Weather

Quick Weather Clicks

Costa Mesa, CA Weather Forecast

Current Conditions

Settings
Costa Mesa CA weather - Partly Cloudy - 77°F
Partly Cloudy
77°F
Updated 1:05 pm
Feels Like 72°F
Humidity 50%
Wind S 8 mph
Barometer  29.99 in
Dew Point 57°F
Costa Mesa CA weather - Partly Cloudy - 25°C
Partly Cloudy
25°C
Updated 1:05 pm
Feels Like 22°C
Humidity 50%
Wind S 13 km/h
Barometer  101.6 kPa
Dew Point 14°C
WX Settings

Costa Mesa Weather Forecast

TODAY TONIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT
Costa Mesa, CA Weather - Today Partly Cloudy Costa Mesa, CA Weather - Tonight Partly Cloudy Costa Mesa, CA Weather - Thursday Partly Cloudy Costa Mesa, CA Weather - Thursday Night Partly Cloudy Costa Mesa, CA Weather - Friday Patchy Fog Costa Mesa, CA Weather - Friday Night Mostly Clear Costa Mesa, CA Weather - Saturday Patchy Fog Costa Mesa, CA Weather - Saturday Night Partly Cloudy Costa Mesa, CA Weather - Sunday Partly Cloudy Costa Mesa, CA Weather - Sunday Night Partly Cloudy Costa Mesa, CA Weather - Monday Partly Cloudy Costa Mesa, CA Weather - Monday Night Mostly Clear
Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Patchy Fog Mostly Clear Patchy Fog Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Mostly Clear
Hi: 73°FHi: 23°C
 Lo: 63°FLo: 17°C Hi: 73°FHi: 23°C
 Lo: 62°FLo: 17°C Hi: 74°FHi: 23°C
 Lo: 64°FLo: 18°C Hi: 76°FHi: 24°C
 Lo: 65°FLo: 18°C Hi: 75°FHi: 24°C
 Lo: 64°FLo: 18°C Hi: 74°FHi: 23°C
 Lo: 64°FLo: 18°C
POP = Probability of Precipitation.
Weather Outlook Updated: 1229 AM PDT Wed Sep 16 2026 Costa Mesa, CA Weather - WeatherWorld.com

Trending Headlines

Costa Mesa Radar Loop

Use the map search tool if you want to place a location marker on the radar map...

Costa Mesa Quick Facts

National Two Day Weather Forecast


E-mail the Costa Mesa Weather Forecast

Voice your opinion or tell us about page issues...

Costa Mesa Forecast Discussion

Meteorlogic Glosserator
Instant definitions for any meteorological term.

Issued: 1200 PM PDT Wed Sep 16 2026

Discussion

...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

The marine layer was around 3500 ft deep this morning, with low clouds filling in the coastal basin. Visible satellite from this morning even showed low clouds through the Cajon Pass. At 11 AM, satellite was still showing patchy low clouds along the coast and portions of the western valleys. The marine layer is expected to stay a similar depth tonight, wit...