City comparison
Johannesburg vs Cape Town air quality
Live AQI comparison between Johannesburg and Cape Town. Data updates every 15 minutes.
Johannesburg and Cape Town differ by 56 AQI points right now. Cape Town has cleaner air at this moment.
What drives air quality in Johannesburg and Cape Town
Johannesburg
Johannesburg sits on the Highveld, where altitude and regional industrial activity combine with urban emissions to shape air quality. Traffic corridors and dense commercial zones contribute daily nitrogen dioxide peaks, while fine particles reflect both local and regional sources. Neighborhood exposure can differ meaningfully across the metro.
Cape Town
Cape Town often benefits from strong coastal winds that disperse pollutants, but local conditions still vary with traffic density and terrain. Busy transport corridors show higher nitrogen dioxide during peak periods. Mountain and valley features can channel airflow unevenly, creating short-lived pockets where particles linger despite good broader ventilation.
Both cities are shaped by different combinations of traffic density, terrain, weather patterns, and seasonal events, which is why the same AQI band can feel different on the ground. Checking live readings rather than relying on reputation or past visits is the most reliable way to plan travel, exercise, or outdoor time between the two.
Live AQI from Open-Meteo (CAMS). Conditions change hourly — refresh for the latest readings. South African cities may show WAQI station data on their dedicated pages.