Worst air pollution Weymouth, today and tomorrow
Today (9 August): Air quality in Weymouth is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 PM (NO2: 51.9/100).
Tomorrow (10 August 2026): Air quality in Weymouth is fair. All pollutants stay as today. Pollution peaks around 9:00 PM (NO2: 49.1/100). 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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Weymouth's air quality reflects its position within Dorset, with local traffic and the town's built-up core as the main contributors. The A14 sees the heaviest traffic, and that shows up clearly in local roadside monitoring. Shifting coastal winds offer a degree of natural ventilation, keeping pollution broadly in line with comparable UK towns.
Today - 9 August | Pollution peaks at 20:00
AQI:
Medium
51.9/100
PM2.5 (fine particles):
Good
18.1/100
PM10 (coarse particles):
Good
6.4/100
NO2 (nitrogen dioxide):
Medium
51.9/100
O3 (ozone):
Fair
28.4/100
SO2 (sulfur dioxide):
Good
12.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
15.8/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 21:00
AQI:
Medium
49.1/100
PM2.5 (fine particles):
Good
10.6/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Medium
49.1/100
O3 (ozone):
Fair
25.0/100
SO2 (sulfur dioxide):
Good
6.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
10.2/100
Pollen forecast in Weymouth
View pollen forecastFrequently Asked Questions
Is air quality bad in Weymouth right now?
On 9 August 2026, overall air quality in Weymouth is fair. O3 is the main pollutant at 28.4/100. Pollution peaks around 8:00 PM (NO2: 51.9/100).
Will air quality be worse tomorrow in Weymouth?
On 10 August 2026, air quality conditions in Weymouth will be similar to today, with O3 forecast at fair at 25.0/100. Pollution peaks around 9:00 PM (NO2: 49.1/100).
When is air pollution at its worst in Weymouth?
Ask a local in Weymouth and they'll tell you air quality changes noticeably from season to season. Winter mornings can be the trickiest, with cold, still conditions trapping A14 traffic fumes and smoke from home fires close to the ground. Summer sunshine can drive up ozone locally, though overall air generally moves and clears more freely than in winter. Spring and autumn tend to be the calmer, more moderate stretches by comparison.
Are air quality levels in Weymouth 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: 10 August 2026 at 02:34 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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