Worst air pollution Cayucos, today and tomorrow
Today (9 August): Air quality in Cayucos is poor. AQI, NO2, and O3 are poor; PM2.5, SO2, and PM1 are fair; PM10, CO, and HCHO are good. Pollution peaks around 7:00 PM (NO2: 71.9/100).
Tomorrow (10 August 2026): Air quality in Cayucos is very poor. AQI worsens to very poor; PM2.5 decreases to medium; PM10 increases to fair; NO2 increases to very poor; O3 decreases to medium; SO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 8:00 PM (NO2: 90.2/100). 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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Air quality in Cayucos is driven mostly by cool Central Coast marine air — onshore breeze keeps air quality consistently good. Day-to-day conditions in Cayucos can still vary with local weather, wind direction, and time of year. As with most US destinations, conditions here are best understood by season rather than by a single yearly average.
Today - 9 August | Pollution peaks at 19:00
AQI:
Poor
71.9/100
PM2.5 (fine particles):
Fair
36.8/100
PM10 (coarse particles):
Good
17.5/100
NO2 (nitrogen dioxide):
Poor
71.9/100
O3 (ozone):
Poor
66.4/100
SO2 (sulfur dioxide):
Fair
32.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Fair
31.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 20:00
AQI:
Very poor
90.2/100
PM2.5 (fine particles):
Medium
41.0/100
PM10 (coarse particles):
Fair
23.0/100
NO2 (nitrogen dioxide):
Very poor
90.2/100
O3 (ozone):
Medium
50.9/100
SO2 (sulfur dioxide):
Medium
40.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.2/100
PM1 (ultrafine particles):
Fair
38.4/100
Pollen forecast in Cayucos
View pollen forecastFrequently Asked Questions
Is air quality bad in Cayucos right now?
On 9 August 2026, overall air quality in Cayucos is poor. AQI is the main air quality indicator at 71.9/100. Pollution peaks around 7:00 PM (NO2: 71.9/100).
Will air quality be worse tomorrow in Cayucos?
On 10 August 2026, air quality conditions in Cayucos will be worse than today, with AQI forecast at very poor at 90.2/100. Pollution peaks around 8:00 PM (NO2: 90.2/100).
When is air pollution at its worst in Cayucos?
Air quality across Cayucos rises and falls with the seasons: winter typically brings the cleanest stretch, once occasional rain clears the basin, but summer and early autumn bring the highest ozone levels, and wildfire smoke can spike particulate readings sharply from August through October. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Cayucos 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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