Worst air pollution Knysna, today and tomorrow
Today (16 July): Air quality in Knysna is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 18.9/100).
Tomorrow (17 July 2026): Air quality in Knysna is fair. AQI worsens to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 28.7/100). 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 - 16 July | Pollution peaks at 15:00
AQI:
Good
18.9/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
18.9/100
O3 (ozone):
Good
18.9/100
SO2 (sulfur dioxide):
Good
16.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
12.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Fair
28.7/100
PM2.5 (fine particles):
Good
12.4/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Fair
28.7/100
O3 (ozone):
Good
16.9/100
SO2 (sulfur dioxide):
Good
16.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
12.0/100
Pollen forecast in Knysna
View pollen forecastSports venues in Knysna
Frequently Asked Questions
Is air quality bad in Knysna right now?
On 16 July 2026, overall air quality in Knysna is good. AQI is the main air quality indicator at 18.9/100. Pollution peaks around 3:00 PM (O3: 18.9/100).
Will air quality be worse tomorrow in Knysna?
On 17 July 2026, air quality conditions in Knysna will be worse than today, with AQI forecast at fair at 28.7/100. Pollution peaks around 11:00 PM (NO2: 28.7/100).
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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app