Porto Alegre pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Porto Alegre is low; cypress is low. Tomorrow (10 August 2026) levels are similar. Over the following five days cypress 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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Porto Alegre's subtropical urban vegetation, anchored by Farroupilha Park and the Guaíba Lake waterfront, features eucalyptus, pine, and native Atlantic Forest species as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Rio Grande do Sul farmland and Atlantic Forest remnants contribute substantial tree and grass pollen throughout the extended subtropical pollen season.
Today - 9 August
-
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
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):
Low
6/100
-
Grass (Poaceae):
None
0/100
-
Willow (Salicaceae):
None
0/100
Air quality in Porto Alegre
View air qualityFrequently Asked Questions
Is pollen high in Porto Alegre right now?
On 9 August 2026, overall pollen levels in Porto Alegre are low. Cypress is the main contributor to airborne pollen
Will pollen levels change in Porto Alegre tomorrow?
On 10 August 2026, pollen conditions in Porto Alegre will be similar to today, with cypress at low levels
Is pollen expected to decrease in Porto Alegre this week?
According to the five-day outlook, cypress pollen levels will increase later in the week.
Which pollen types are currently active in Porto Alegre?
On 9 August 2026, Cypress is the dominant pollen source in Porto Alegre. willow are not currently active.
When is pollen season in Porto Alegre?
How often is the Porto Alegre pollen forecast updated?
The Porto Alegre pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Porto Alegre 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 Porto Alegre 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 Porto Alegre, 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 Brazil?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Porto Alegre.
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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.