Worst air pollution Knysna, today and tomorrow
Today (9 August): Air quality in Knysna is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 PM (O3: 16.0/100).
Tomorrow (10 August 2026): Air quality in Knysna is good. All pollutants stay as today. Pollution peaks around 3:00 PM (O3: 17.5/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Knysna's air quality benefits from its exceptional Garden Route coastal position on the Knysna Lagoon, with consistent Indian Ocean and Atlantic sea breezes providing reliable maritime ventilation across this famous southern Cape resort town. Vehicle traffic on the N2 Garden Route highway is the primary local source, while the surrounding Knysna Forest provides outstanding clean-air buffering and the lagoon's coastal geography generally maintains excellent to good conditions on most days.
Today - 9 August | Pollution peaks at 20:00
AQI:
Good
16.0/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
2.9/100
NO2 (nitrogen dioxide):
Good
7.3/100
O3 (ozone):
Good
16.0/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
4.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 15:00
AQI:
Good
17.5/100
PM2.5 (fine particles):
Good
6.1/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
5.6/100
O3 (ozone):
Good
17.5/100
SO2 (sulfur dioxide):
Good
3.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
2.2/100
Pollen forecast in Knysna
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Frequently Asked Questions
Is air quality bad in Knysna right now?
On 9 August 2026, overall air quality in Knysna is good. AQI is the main air quality indicator at 16.0/100. Pollution peaks around 8:00 PM (O3: 16.0/100).
Will air quality be worse tomorrow in Knysna?
On 10 August 2026, air quality conditions in Knysna will be similar to today, with AQI forecast at good at 17.5/100. Pollution peaks around 3:00 PM (O3: 17.5/100).
When is air pollution at its worst in Knysna?
At Knysna, air quality rarely varies much across the seasons, since the Garden Route's consistent rainfall and onshore winds provide reliable ventilation in both winter and summer months alike. The only brief exceptions come on calm, windless days, when local traffic emissions can build up slightly before the usual breeze clears them away again.
Are air quality levels in Knysna based on measurements or forecasts?
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.
Why doesn’t the forecast always reflect wildfire impacts?
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.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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