Worst air pollution Port St Johns, today and tomorrow
Today (9 August): Air quality in Port St Johns is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 18.7/100).
Tomorrow (10 August 2026): Air quality in Port St Johns is good. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 17.5/100). Airmine updates local air quality forecasts four times daily.
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Port St Johns lies roughly 450 km northeast of Gqeberha. Air quality at Port St Johns is generally shaped by vehicle traffic and mixed farming and light industrial activity typical of the Eastern Cape. The area's moderate, transitional climate between two rainfall regimes usually allows for decent dispersal of local emissions, though calm mornings can occasionally see particulate levels rise. This mirrors what's typical for towns across the wider region.
Today - 9 August | Pollution peaks at 16:00
AQI:
Good
18.7/100
PM2.5 (fine particles):
Good
15.9/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Good
11.6/100
O3 (ozone):
Good
18.7/100
SO2 (sulfur dioxide):
Good
12.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
16.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 12:00
AQI:
Good
17.5/100
PM2.5 (fine particles):
Good
6.3/100
PM10 (coarse particles):
Good
2.8/100
NO2 (nitrogen dioxide):
Good
3.5/100
O3 (ozone):
Good
17.5/100
SO2 (sulfur dioxide):
Good
3.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Good
2.6/100
Pollen forecast in Port St Johns
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Port St Johns
Frequently Asked Questions
Is air quality bad in Port St Johns right now?
On 9 August 2026, overall air quality in Port St Johns is good. AQI is the main air quality indicator at 18.7/100. Pollution peaks around 4:00 PM (O3: 18.7/100).
Will air quality be worse tomorrow in Port St Johns?
On 10 August 2026, air quality conditions in Port St Johns will be similar to today, with AQI forecast at good at 17.5/100. Pollution peaks around 12:00 PM (O3: 17.5/100).
When is air pollution at its worst in Port St Johns?
Dry winter months bring the weakest air quality to Port St Johns, as reduced rainfall lets dust tied to mixed farming and light industrial activity persist longer than usual around town. Spring and summer typically bring clearer conditions as rainfall increases across this transitional Eastern Cape climate zone, a seasonal pattern typical of this Eastern Cape climate zone.
Are air quality levels in Port St Johns 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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