Barcelona Marathon - Pollen and Air Quality Forecast for Today
Pollen levels are low to medium today, with mugwort and grass as the main active species. Air quality along the route is fair. O3 (22.4/100) is fair. The remaining pollutants stay at good levels. Based on Airmine's forecast, which uses satellite data to calculate exposure every 200 metres along the route, air quality is at its worst 32.5 km after start. Pollen exposure peaks at 30.6 km after start.
To prepare for your activity, use the Airmine app to check the Barcelona Marathon forecast before heading out.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Barcelona Marathon runs through the Barcelona waterfront and Eixample streets, with plane, pine, and cypress as the main tree pollen sources along the urban route. Cypress contributes from January through spring, grass peaks through April and May on the race date in March, while the warm Mediterranean climate advances the season and sea breezes from the coast can periodically disperse pollen throughout this iconic Catalan coastal city marathon.
Today - 10 August
Pollen
Alder (Alnus):
None
0/100
Birch (Betula):
None
0/100
Hazel (Corylus):
None
0/100
Cypress (Cupressaceae):
None
0/100
Grass (Poaceae):
Low
3/100
Willow (Salicaceae):
None
0/100
Oak (Quercus):
None
0/100
Mugwort (Artemisia):
Medium
40/100
Mulberry (Morus):
None
0/100
Eucalyptus (Myrtaceae):
None
0/100
Plane (Platanus):
None
0/100
Nettle (Urtica):
None
0/100
Acacia (Acacia):
None
0/100
Ragweed (Ambrosia):
None
0/100
Air Quality
PM2.5 (fine particles):
Good
9.0/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
10.5/100
O3 (ozone):
Fair
22.4/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Good
7.5/100
Levels show the highest exposure along the full route
Other routes:
Frequently Asked Questions
Where is air quality worst on the Barcelona Marathon route?
Based on today's forecast, O3 is forecast at fair levels along the route today (22.4/100). Air quality is at its worst after 32.5 km into the route. Airmine calculates exposure at 200m intervals along the course using satellite-derived atmospheric data.
Where is pollen highest on the Barcelona Marathon course?
Pollen exposure peaks at km 30.6 today. This changes through the season as different pollen species become active.
When is pollen worst during the Barcelona Marathon season?
March coincides with peak mugwort season. Grass pollen typically rises in May-June.
How often is this forecast updated?
Updated four times daily. See the timestamp below for the most recent update.
Are pollen levels in Barcelona Marathon based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Barcelona Marathon, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Levels show the highest exposure along the full route. Airmine uses satellite data to calculate pollen and air quality every 200 metres along each race route, updated four times daily.
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 responsibiity.
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.