Viseu pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Viseu is low; grass is low. Tomorrow (26 June 2026) levels are similar - grass increasing. Over the following five days grass will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Viseu's parks and the Pavia River corridor feature oak, pine, and chestnut as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Portuguese highland woodland and farmland contribute substantial tree and grass pollen, while the Atlantic-facing position means frequent onshore westerly winds and rainfall provide regular interruptions to exposure throughout the season.
Today - 25 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
9/100
-
Willow (Salicaceae):
None
0/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 26 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Medium
34/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Viseu right now?
On 25 June 2026, overall pollen levels in Viseu are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Viseu tomorrow?
On 26 June 2026, pollen conditions in Viseu will be different from today, with grass increasing
Is pollen expected to decrease in Viseu this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in Viseu?
On 25 June 2026, Grass is the dominant pollen source in Viseu. hazel, cypress, willow, alder, and birch 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.
Want to see pollen forecasts for other cities in Portugal?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 25 Jun 2026, 09:02 CET (Data is updated four times daily.)
This page provides the latest public pollen forecast for Viseu.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.