Air Quality in Costa Mesa, United States

Windy
24.9°C · 45.2% humidity
24.9°
Feels 24.9°
16
Good
Air quality is satisfactory. Enjoy outdoor activities.
5 stations

Nearby Monitoring Stations

AQI Forecast
54 11am
54
54
16 2pm
7
14
20 5pm
17
27
29 8pm
30
31
32 11pm
33
33
33 2am
34
34
34 5am
54
54
54 8am
54
54
AD 728×90

Air Quality Index Trend

46h · 114 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.

45.2%
Humidity
52.3 km/h
Wind SW
1011.9 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
16
3.83 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Costa Mesa?

Temperature & Precipitation

PM2.5 Trend

46h · 114 stations
PM2.53.83 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (5 stations within 25 km)
3.83
Median
3.79
Average
3.02
Low
4.17
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +5.9

What is the 7-day forecast for Costa Mesa?

05-28
22.4° 16.7°
05-29
24.9° 17.8°
05-30
20.5° 16.6°
05-31
23.2° 18.6°
06-01
23.1° 18.2°
06-02
24.1° 16.0°
06-03
22.8° 16.3°
Both models agree Avg diff: 2.0°C

Where are air quality stations near Costa Mesa?

16
Monroe Elementary
9.6 km PM2.5: 3.9 µg/m³
17
Century High School
11.8 km PM2.5: 4.1 µg/m³
16
Kennedy Elementary
11.9 km PM2.5: 3.8 µg/m³
18
Villa Intermediate
13.1 km PM2.5: 4.2 µg/m³
12
Davis Elementary
13.9 km PM2.5: 3.0 µg/m³

What cities are near Costa Mesa?

16 Newport Beach 16 UC Irvine 16 Huntington Beach 16 Fountain Valley 16 Irvine 16 Tustin Legacy 16 Westpark 16 Woodbridge 15 Santa Ana 16 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 2026-05-28T21:47 UTC.