Worst air pollution San Fernando, today and tomorrow
Today (16 July): Air quality in San Fernando is fair. PM2.5 and NO2 are fair; AQI and O3 are medium; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (O3: 40.1/100).
Tomorrow (17 July 2026): Air quality in San Fernando is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 37.7/100). 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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San Fernando's air quality in Spain benefits from the exceptional Bay of Cádiz and Atlantic coastal position, with the Poniente and Levante winds providing some of Spain's most reliable and powerful natural ventilation around the Isla de León. Vehicle traffic on the N-443 and the Spanish naval base operations are the primary local sources, while the outstanding Atlantic and strait exposure generally maintains San Fernando among Spain's cleaner urban environments.
Today - 16 July | Pollution peaks at 00:00
AQI:
Medium
40.1/100
PM2.5 (fine particles):
Fair
22.7/100
PM10 (coarse particles):
Good
13.3/100
NO2 (nitrogen dioxide):
Fair
23.0/100
O3 (ozone):
Medium
40.1/100
SO2 (sulfur dioxide):
Good
7.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
18.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
37.7/100
PM2.5 (fine particles):
Fair
22.6/100
PM10 (coarse particles):
Good
11.2/100
NO2 (nitrogen dioxide):
Fair
20.6/100
O3 (ozone):
Fair
37.7/100
SO2 (sulfur dioxide):
Good
6.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.7/100
PM1 (ultrafine particles):
Good
14.7/100
Pollen forecast in San Fernando
View pollen forecastFrequently Asked Questions
Is air quality bad in San Fernando right now?
On 16 July 2026, overall air quality in San Fernando is fair. NO2 is the main pollutant at 23.0/100. Pollution peaks around 12:00 AM (O3: 40.1/100).
Will air quality be worse tomorrow in San Fernando?
On 17 July 2026, air quality conditions in San Fernando will be similar to today, with AQI forecast at fair at 37.7/100. Pollution peaks around 2:00 PM (O3: 37.7/100).
When is air pollution at its worst in San Fernando?
Does air quality in San Fernando vary by season? Winter high-pressure systems tend to produce the year's worst episodes, as still air traps traffic fumes and heating smoke at ground level. As spring progresses, wetter and windier conditions generally help flush out the traffic and heating pollution that built up over winter. Hot, dry summer conditions favour ozone formation, so afternoon readings can rise even when traffic and heating pollution are otherwise low. Autumn usually sees a steady return to cleaner conditions as the ozone-favouring heat of summer fades and rainfall picks up. This area's proximity to North Africa means Saharan dust episodes can arrive at almost any time of year, layering onto the seasonal pattern.
Are air quality levels in San Fernando 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