Weather in Costa Mesa, United States 🇺🇸
As of now, Costa Mesa is 15°C and sunny, feeling like 13°C. The air is at 85% humidity and winds are about 11 km/h, and the UV index is 0 (low). Over the next few days, temperatures in Costa Mesa range from about 15°C to 26°C.
Hourly Forecast for Costa Mesa
14-Day Forecast for Costa Mesa
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Partly Cloudy
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Additional Forecasts for Costa Mesa
Air Quality
Historical Weather
Weather Forecasts for Other Cities in United States
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Best Time to Be Outside in Costa Mesa Today
The most comfortable window in Costa Mesa today looks like 17:00 to 20:00, when it is around 22°C. It should stay dry through that window. No significant rain is expected in the next several hours.
Frequently Asked Questions about Weather in Costa Mesa
What is the temperature in Costa Mesa right now?
Costa Mesa is sitting at 15°C (59°F) right now, sunny (feels like 13°C).
What's the weather like in Costa Mesa right now?
Current weather in Costa Mesa: Sunny, humidity 85%, wind 11 km/h SE.
What is today's forecast for Costa Mesa?
Today in Costa Mesa: high 25°C, low 15°C, sunny. Chance of rain: 6%.
What is the 7-day weather forecast for Costa Mesa?
Daily highs and lows for Costa Mesa:
- 2026-09-03: 25°C / 15°C
- 2026-09-04: 25°C / 20°C
- 2026-09-05: 26°C / 21°C
- 2026-09-06: 26°C / 23°C
- 2026-09-07: 28°C / 23°C
- 2026-09-08: 27°C / 22°C
- 2026-09-09: 28°C / 23°C
Is it going to rain in Costa Mesa today?
There is a 6% chance of rain in Costa Mesa today.
What is the wind speed in Costa Mesa right now?
Wind in Costa Mesa is currently 11 km/h (7 mph) from the SE.
What is the UV index in Costa Mesa right now?
The UV index in Costa Mesa is currently 0.1 (low). Sun protection is recommended when the index is 3 or higher.
