Worst air pollution Weymouth, today and tomorrow
Today (16 July): Air quality in Weymouth is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (NO2: 29.5/100).
Tomorrow (17 July 2026): Air quality in Weymouth is fair. AQI improves to medium; NO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 8:00 PM (NO2: 49.6/100). 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 - 16 July | Pollution peaks at 09:00
AQI:
Fair
29.5/100
PM2.5 (fine particles):
Good
11.2/100
PM10 (coarse particles):
Good
4.0/100
NO2 (nitrogen dioxide):
Fair
29.5/100
O3 (ozone):
Fair
29.1/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
8.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 20:00
AQI:
Medium
49.6/100
PM2.5 (fine particles):
Good
16.2/100
PM10 (coarse particles):
Good
5.5/100
NO2 (nitrogen dioxide):
Medium
49.6/100
O3 (ozone):
Fair
23.0/100
SO2 (sulfur dioxide):
Good
5.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
15.7/100
Pollen forecast in Weymouth
View pollen forecastFrequently Asked Questions
Is air quality bad in Weymouth right now?
On 16 July 2026, overall air quality in Weymouth is fair. AQI is the main air quality indicator at 29.5/100. Pollution peaks around 9:00 AM (NO2: 29.5/100).
Will air quality be worse tomorrow in Weymouth?
On 17 July 2026, air quality conditions in Weymouth will be similar to today, with O3 forecast at fair at 23.0/100. Pollution peaks around 8:00 PM (NO2: 49.6/100).
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.
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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