Worst air pollution Marseille, today and tomorrow

On 9 August 2026, overall air quality in Marseille is fair. NO2 is the main pollutant at 20.6/100. Pollution peaks around 6:00 PM (O3: 54.0/100).

On 10 August 2026, air quality conditions in Marseille will be similar to today, with NO2 forecast at fair at 24.2/100. Pollution peaks around 4:00 PM (O3: 55.5/100).

The days that hit sensitive groups hardest in Marseille are calm spring ones, when tourist traffic and coastal industry and the plane and pine pollen peak overlap; the Mistral wind provides powerful periodic ventilation, so relief usually isn't far behind. The presence of Provencal farmland and garrigue scrub in the area adds another layer to the local pattern.

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.

Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.

During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.