Viseu pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Viseu is low; cypress is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress will increase; grass and willow will remain stable.
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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) | Low | 7/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
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) | Low | 2/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 |
Local Environmental Conditions
Viseu lies in the Pará northeastern Amazon zone near the Gurupi River, where native Amazon forest remnants, secondary vegetation, and babaçu palm are the main pollen sources. Year-round tropical pollen production means no distinct seasonal boundaries, while frequent rainfall provides regular interruptions and the wet season from January to June brings the most sustained breaks throughout this remote northeastern Pará municipality.
Viseu's tropical climate keeps native Amazon forest remnants and babaçu palm pollen in the air year-round, with the clearest breaks coming during the wet season from January to June when rainfall is most frequent.
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Frequently Asked Questions About Pollen in Pará
Is pollen high in Viseu right now?
On 20 September 2026, overall pollen levels in Viseu are low. Cypress is the main contributor to airborne pollen
Will pollen levels change in Viseu tomorrow?
On 21 September 2026, pollen conditions in Viseu will be similar to today, with cypress at low levels
Is pollen expected to decrease in Viseu this week?
According to the five-day outlook, cypress pollen levels will increase later in the week.
Which pollen types are currently active in Viseu?
On 20 September 2026, Cypress is the dominant pollen source in Viseu. grass and willow are not currently active.
When is pollen season in Viseu?
How often is the Viseu pollen forecast updated?
The Viseu pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Viseu 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 Viseu 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 Viseu, 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).
