Weather in Costa Mesa, California
Saturday 21 November 2026
17°
Clear sky
Feels like 14°
- High
- 17°
- Low
- 13°
- Humidity
- 50%
- Wind
- 11 km/h
Temperature and rain / Costa Mesa
The coming days
High
24°
Low
13°
Average high
20.5°
Average low
15.6°
Total rain
48.8 mm
Average rain
3.3 mm
Air quality - Costa Mesa
Particles and ozone
Good
7.20 µg/m³
0-1212-3535-5555+
The air is clean: enjoy the outdoors.
PM1010.00µg/m³
Ozone97µg/m³
Data updated hourly
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Frequently asked questions
Quick answers about the weather in Costa Mesa
Tomorrow in Costa Mesa, expect Heavy rain 🌧️, with:\n\n- High of 22°\n- Low of 16°
Need more information?
Our data is updated regularly to give you the most reliable forecast.
Last updated: 2026-11-13