Worst air pollution Guaymas, today and tomorrow
Today (9 August): Air quality in Guaymas is poor. AQI and PM10 are poor; O3 is fair; PM2.5 is medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (PM10: 69.7/100).
Tomorrow (10 August 2026): Air quality in Guaymas is poor. All pollutants stay as today. Pollution peaks around 4:00 PM (PM10: 76.2/100). 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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Guaymas's air quality benefits from its exceptional Gulf of California and Pacific Ocean dual-coastal position in Sonora, with consistent Gulf of California and Pacific maritime breezes providing reliable ventilation. Vehicle traffic on surrounding roads and the fishing port, industrial, and automotive manufacturing corridor contribute local sources, while the outstanding dual-coast maritime exposure and the dramatic Sierra de la Giganta rising inland generally maintain Guaymas among northwestern Mexico's more moderately ventilated coastal industrial port cities throughout most of the year.
Today - 9 August | Pollution peaks at 17:00
AQI:
Poor
69.7/100
PM2.5 (fine particles):
Medium
49.5/100
PM10 (coarse particles):
Poor
69.7/100
NO2 (nitrogen dioxide):
Good
0.8/100
O3 (ozone):
Fair
26.4/100
SO2 (sulfur dioxide):
Good
9.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
11.4/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 16:00
AQI:
Poor
76.2/100
PM2.5 (fine particles):
Medium
52.3/100
PM10 (coarse particles):
Poor
76.2/100
NO2 (nitrogen dioxide):
Good
0.8/100
O3 (ozone):
Fair
31.3/100
SO2 (sulfur dioxide):
Good
17.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
13.8/100
Frequently Asked Questions
Is air quality bad in Guaymas right now?
On 9 August 2026, overall air quality in Guaymas is poor. AQI is the main air quality indicator at 69.7/100. Pollution peaks around 5:00 PM (PM10: 69.7/100).
Will air quality be worse tomorrow in Guaymas?
On 10 August 2026, air quality conditions in Guaymas will be similar to today, with AQI forecast at poor at 76.2/100. Pollution peaks around 4:00 PM (PM10: 76.2/100).
When is air pollution at its worst in Guaymas?
Guaymas usually sees its poorest air quality when traffic on the surrounding roads, manufacturing activity, together with harbour and shipping traffic coincide with periods when windblown dust events occur. Dust carried on these winds adds substantially to particulate levels. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Guaymas 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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