Worst air pollution Guildford, today and tomorrow
Today (25 August): Air quality in Guildford is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (NO2: 26.6/100).
Tomorrow (26 August 2026): Air quality in Guildford is moderate. AQI worsens to moderate; NO2 increases to moderate; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 PM (NO2: 40.9/100). 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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In Guildford, with less congestion here, dust from surrounding fields and occasional burning plays a bigger role than traffic. Trees and green space nearby provide a partial buffer, catching particulate matter before it spreads further. The surrounding area tends to follow a similar pattern, with only minor local variation. Wind patterns on any given day can shift this picture meaningfully in either direction.
Today - 25 August | Pollution peaks at 07:00
AQI:
Fair
26.6/100
PM2.5 (fine particles):
Good
13.9/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Fair
26.6/100
O3 (ozone):
Good
12.8/100
SO2 (sulfur dioxide):
Good
11.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.5/100
PM1 (ultrafine particles):
Good
19.5/100
Levels show the poorest local air quality during the day
Tomorrow - 26 August | Pollution peaks at 22:00
AQI:
Moderate
40.9/100
PM2.5 (fine particles):
Good
13.8/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Moderate
40.9/100
O3 (ozone):
Good
18.3/100
SO2 (sulfur dioxide):
Good
11.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Fair
20.3/100
Pollen forecast in Guildford
View pollen forecastFrequently Asked Questions
Is air quality bad in Guildford right now?
On 25 August 2026, overall air quality in Guildford is fair. AQI is the main air quality indicator at 26.6/100. Pollution peaks around 7:00 AM (NO2: 26.6/100).
Will air quality be worse tomorrow in Guildford?
On 26 August 2026, air quality conditions in Guildford will be worse than today, with AQI forecast at moderate at 40.9/100. Pollution peaks around 10:00 PM (NO2: 40.9/100).
When is air pollution at its worst in Guildford?
The colder months typically bring the heaviest particulate levels of the year, as cold, still air holds wood smoke and heating emissions close to the ground through winter. As the weather warms and fire risk rises, smoke haze tends to overtake other concerns in this area, with bushfire smoke capable of pushing particulate readings well above the ozone increase from heat and sun alone.
Are air quality levels in Guildford 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: 24 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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