Air Quality in Costa Mesa, United States

Windy
26.7°C · 68.3% humidity
26.7°
Feels 26.7°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
54 5am
54
54
28 8am
47
53
56 11am
59
61
62 2pm
63
64
65 5pm
53
53
54 8pm
54
54
34 11pm
34
54
54 2am
54
54
AD 728×90

Air Quality Index Trend

45h · 103 stn

Costa Mesa's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

68.3%
Humidity
42.1 km/h
Wind WSW
1016.0 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
28
6.75 µg/m³
PM10▲
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Costa Mesa?

Temperature & Precipitation

PM2.5 Trend

45h · 103 stations
PM2.56.75 µg/m³ ✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250

What is the 7-day forecast for Costa Mesa?

09-05
26.7° 23.3°
09-06
29.4° 21.6°
09-07
28.9° 23.6°
09-08
26.9° 20.3°
0.38 mm
09-09
30.5° 21.1°
09-10
28.0° 19.4°
09-11
31.8° 22.1°
Both models agree Avg diff: 3.2°C

Where are air quality stations near Costa Mesa?

8
Monroe Elementary
9.6 km PM2.5: 2.0 µg/m³
29
Century High School
11.8 km PM2.5: 7.0 µg/m³
20
Kennedy Elementary
11.9 km PM2.5: 4.8 µg/m³
11
Villa Intermediate
13.1 km PM2.5: 2.7 µg/m³
11
Davis Elementary
13.9 km PM2.5: 2.7 µg/m³

What cities are near Costa Mesa?

28 Newport Beach 42 UC Irvine 28 Huntington Beach 42 Fountain Valley 42 Irvine 42 Tustin Legacy 42 Westpark 48 Woodbridge 42 Santa Ana 42 Tustin
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-09-05T15:50 UTC.