Hong Kong Air Quality — Live AQI & Harbour City Forecast

Hong Kong's air quality blends local traffic and port emissions with regional smog transported from the wider Pearl River Delta industrial belt. When northerly winds prevail, PM2.5 and ozone can climb even in neighbourhoods far from busy roads.

Harbour breezes and marine airflow sometimes improve coastal districts while trapping pollutants against urban hillsides. Typhoon-season rains can wash particles out quickly, but calm winter days may bring multi-day haze.

Live AQI and hourly trends help residents plan harbour walks, school routes, and rooftop exercise. Choosing times after rain or with onshore winds often yields measurably cleaner air.