Leiria pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Leiria is low; mugwort is low. Tomorrow (10 August 2026) levels are similar. Over the following five days mugwort will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Leiria's parks and the Lis River corridor oak and eucalyptus provide most of the tree pollen, and grass from Leiria farmland contributes through the spring weeks. The area's Atlantic exposure brings frequent rainfall interruptions.
Today - 9 August
-
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):
Low
14/100
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 - 10 August
-
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):
Low
16/100
Air quality in Leiria
View air qualityFrequently Asked Questions
Is pollen high in Leiria right now?
On 9 August 2026, overall pollen levels in Leiria are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Leiria tomorrow?
On 10 August 2026, pollen conditions in Leiria will be similar to today, with artemisia at low levels
Is pollen expected to decrease in Leiria this week?
According to the five-day outlook, grass and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Leiria?
On 9 August 2026, Artemisia is the dominant pollen source in Leiria. cypress, grass, willow, and hazel are not currently active.
When is pollen season in Leiria?
How often is the Leiria pollen forecast updated?
The Leiria pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Leiria 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 Leiria 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 Leiria, 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: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Leiria.
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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
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.