Worst air pollution Oceanside, today and tomorrow
Today (15 July): Air quality in Oceanside is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 28.3/100).
Tomorrow (16 July 2026): Air quality in Oceanside is fair. PM10 decreases to good; all other pollutants stay as today. Pollution peaks around 8:00 AM (O3: 28.9/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Oceanside's air quality benefits from its direct Pacific Ocean coastal exposure on the San Diego County coast, with consistent onshore sea breezes providing reliable maritime ventilation along this northern San Diego County coastline. The primary local concerns are vehicle emissions from I-5 and the Camp Pendleton Marine Corps Base military vehicle and training operations generating elevated NOₓ and PM10, while the coastal position generally provides significantly better air quality than the inland San Diego County valleys throughout most of the year.
Today - 15 July | Pollution peaks at 07:00
AQI:
Fair
28.3/100
PM2.5 (fine particles):
Good
15.0/100
PM10 (coarse particles):
Fair
24.7/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
28.3/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.6/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 08:00
AQI:
Fair
28.9/100
PM2.5 (fine particles):
Good
11.0/100
PM10 (coarse particles):
Good
19.4/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
28.9/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.4/100
Pollen forecast in Oceanside
View pollen forecastFrequently Asked Questions
Is air quality bad in Oceanside right now?
On 15 July 2026, overall air quality in Oceanside is fair. AQI is the main air quality indicator at 28.3/100. Pollution peaks around 7:00 AM (O3: 28.3/100).
Will air quality be worse tomorrow in Oceanside?
On 16 July 2026, air quality conditions in Oceanside will be similar to today, with AQI forecast at fair at 28.9/100. Pollution peaks around 8:00 AM (O3: 28.9/100).
When is air pollution at its worst in Oceanside?
Oceanside's air quality follows a clear seasonal pattern: winter rains provide the only real relief from an otherwise persistent haze, but hot, sunny summer conditions drive persistent ozone problems, compounded by wildfire smoke risk into early autumn. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Oceanside based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app