Barreiro pollen forecast - today, tomorrow and the week ahead

On 9 August 2026, overall pollen levels in Barreiro are low. Artemisia is the main contributor to airborne pollen

On 10 August 2026, pollen conditions in Barreiro will be similar to today, with artemisia at low levels

According to the five-day outlook, grass and artemisia pollen levels will increase later in the week.

On 9 August 2026, Artemisia is the dominant pollen source in Barreiro. cypress, grass, willow, and hazel are not currently active.

Barreiro follows the mild, wet Atlantic pattern: pine and eucalyptus first, grass across spring, and frequent rain keeping levels down across the January-June window. Southerly stretches of coastline tend to see an earlier, warmer start to the season.

The Barreiro pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

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 Barreiro, 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.