United States
Air quality in San Diego is poor. Sensitive individuals should exercise indoors.
Data from Open-Meteo • Updated 8:51:47 AM
San Diego enjoys some of the best air quality among major California cities, thanks to consistent ocean breezes. However, wildfire season can bring dangerous smoke events, and summer ozone occasionally affects inland areas. The coastal location helps maintain generally Good AQI readings.
San Diego typically sees AQI readings between 25 and 55, among the best for major US cities. Coastal areas generally stay in the Good range, while inland valleys may see Moderate levels in summer.
Morning runs along the coast offer excellent air quality year-round. During wildfire season (typically August through November), check conditions before heading out as smoke can rapidly change the AQI.