Costa Mesa, CA Weather Forecast
Orange County, California
Live radar, warnings and storm tracking for Costa Mesa, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Costa Mesa
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Costa Mesa, CA at a glance
Costa Mesa is home to about 108,354 people in Orange County, across 16 square miles. It ranks 63rd by population of 450 places in California with a forecast here. The nearest neighbour with its own forecast is Fountain Valley, 4 miles away.
- County
- Orange County
- Population
- 108,354 2023 est.
- Land area
- 16 sq mi
- People per sq mi
- 6,855
- Forecast point
- 33.6659°N, 117.9123°W
How well can the network see Costa Mesa?
The nearest Doppler radar is KSOX (Santa Ana Mountains, CA), to the ENE. Its lowest scan passes about 1,100 ft above Costa Mesa. That is about as close as US radar coverage gets: low-level rotation and gust fronts over Costa Mesa show up clearly. Costa Mesa is closer to its radar than 86% of US cities.
The closest weather station is KSNA (Santa Ana/Wayne Arpt). Close enough that its readings are the conditions in town.
Forecasts near Costa Mesa
- Fountain Valley, CA4 mi
- Newport Beach, CA5 mi
- Santa Ana, CA5 mi
- Huntington Beach, CA6 mi
- Tustin, CA7 mi
- Westminster, CA8 mi
- Irvine, CA8 mi
- Garden Grove, CA8 mi
Elsewhere in California
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