Worst air pollution Knokke-Heist, today and tomorrow

Today (9 August): Air quality in Knokke-Heist is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 39.8/100).
Tomorrow (10 August 2026): Air quality in Knokke-Heist is fair. All pollutants stay as today. Pollution peaks around 12:00 AM (O3: 29.7/100). Airmine updates local air quality forecasts four times daily.

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Local air quality in Knokke-Heist tracks closely with summer tourist traffic and vehicle traffic on the coastal road, given its position on the Belgian North Sea coast in West-Vlaanderen. Wind and precipitation are the main levers for clearing the air here, with the stillest conditions generally producing the town's weakest readings.

Today - 9 August | Pollution peaks at 14:00

AQI:

Fair

39.8/100

PM2.5 (fine particles):

Good

7.5/100

PM10 (coarse particles):

Good

3.5/100

NO2 (nitrogen dioxide):

Good

7.0/100

O3 (ozone):

Fair

39.8/100

SO2 (sulfur dioxide):

Good

1.2/100

CO (carbon monoxide):

Good

0.0/100

HCHO (formaldehyde):

Good

5.8/100

PM1 (ultrafine particles):

Good

10.5/100

Levels show the poorest local air quality during the day

Tomorrow - 10 August | Pollution peaks at 00:00

AQI:

Fair

29.7/100

PM2.5 (fine particles):

Good

9.3/100

PM10 (coarse particles):

Good

3.5/100

NO2 (nitrogen dioxide):

Good

3.4/100

O3 (ozone):

Fair

29.7/100

SO2 (sulfur dioxide):

Good

0.6/100

CO (carbon monoxide):

Good

0.0/100

HCHO (formaldehyde):

Good

2.8/100

PM1 (ultrafine particles):

Good

5.9/100

Pollen forecast in Knokke-Heist

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Sports venues in Knokke-Heist

Frequently Asked Questions

Is air quality bad in Knokke-Heist right now?

On 9 August 2026, overall air quality in Knokke-Heist is fair. AQI is the main air quality indicator at 39.8/100. Pollution peaks around 2:00 PM (O3: 39.8/100).

Will air quality be worse tomorrow in Knokke-Heist?

On 10 August 2026, air quality conditions in Knokke-Heist will be similar to today, with AQI forecast at fair at 29.7/100. Pollution peaks around 12:00 AM (O3: 29.7/100).

When is air pollution at its worst in Knokke-Heist?

The times to expect weaker air quality in Knokke-Heist are during birch and oak pollen peaks and spells of summer tourist traffic and vehicle traffic on the coastal road; beyond those windows, conditions across West-Vlaanderen are typically steadier, particularly when wind or rain helps clear the air.

Are air quality levels in Knokke-Heist 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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