Póvoa de Santa Iria pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Póvoa de Santa Iria is high; mugwort is high.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will increase; cypress, grass, and willow will remain stable.
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Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | High | 67/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | High | 62/100 |
Local Environmental Conditions
Póvoa de Santa Iria, on the Tagus estuary north of Lisbon, draws most of its pollen from oak and olive among local trees, with late grass pollen contributing from farmland and green corridors around Lisboa. The built environment here creates a patchy exposure pattern, generally higher near parks and lower along the busiest streets.
Residents of Póvoa de Santa Iria see hazel and alder give way to a oak and olive peak through the heart of spring, before late grass pollen takes over into early summer; the full cycle spans the January-to-August window. hot, dry summer conditions cut the pollen season short here.
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Frequently Asked Questions About Pollen in Lisboa
Is pollen high in Póvoa de Santa Iria right now?
On 20 September 2026, overall pollen levels in Póvoa de Santa Iria are high. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Póvoa de Santa Iria tomorrow?
On 21 September 2026, pollen conditions in Póvoa de Santa Iria will be similar to today, with artemisia at high levels
Is pollen expected to decrease in Póvoa de Santa Iria this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Póvoa de Santa Iria?
On 20 September 2026, Artemisia is the dominant pollen source in Póvoa de Santa Iria. grass, willow, and cypress are not currently active.
When is pollen season in Póvoa de Santa Iria?
How often is the Póvoa de Santa Iria pollen forecast updated?
The Póvoa de Santa Iria pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Póvoa de Santa Iria come from nearby or far away?
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.
Are pollen levels in Póvoa de Santa Iria 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 Póvoa de Santa Iria, 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.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
