Air Quality in Costa Mesa, United States

Windy
26.7°C · 68.3% humidity
26.7°
Feels 26.7°
34
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
54 6am
54
54
34 9am
43
50
54 12pm
58
60
62 3pm
63
64
52 6pm
53
53
53 9pm
54
34
34 12am
54
54
54 3am
54
54
AD 728×90

Air Quality Index Trend

45h · 110 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
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
34
8.18 µg/m³
PM10▲
38
41.2 µg/m³
050100150200300500

What is the weather forecast for Costa Mesa?

Temperature & Precipitation

PM2.5 Trend

45h · 110 stations
PM2.58.18 µg/m³ ✓ WHO
Good
PM1041.2 µg/m³
Good
UV INDEX6.9
High
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?

34 Newport Beach 48 UC Irvine 34 Huntington Beach 48 Fountain Valley 48 Irvine 48 Tustin Legacy 48 Westpark 42 Woodbridge 48 Santa Ana 48 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 2026-09-05T16:39 UTC.