United States
Air quality in San Francisco is good. Safe for outdoor exercise.
Data from Open-Meteo • Updated 1:56:03 AM
San Francisco benefits from strong ocean winds that keep air quality good, but wildfire smoke can quickly degrade conditions. The city's microclimates mean air quality varies significantly between neighborhoods. Runners should check conditions during fire season and favor coastal paths for cleaner air.
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Try it freeSan Francisco typically enjoys AQI readings between 20 and 50, among the best for major US cities. However, wildfire smoke events can push the AQI well above 200 for days at a time.
Morning runs along the Embarcadero or through Golden Gate Park offer excellent air quality most of the year. Avoid outdoor exercise during wildfire smoke events, which typically occur from August through October.
Deep dive into pollutants, thresholds, and how air quality affects your running performance.
Quick threshold lookup for every AQI level. Know when to run and when to stay indoors.
Practical rules for training during smoke events: when to go indoors and how to recover.