Porto Alegre pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Porto Alegre is low; cypress is low. Tomorrow (17 July 2026) levels are similar. Over the following five days cypress will decrease. 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

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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 - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    10/100

  • Grass (Poaceae):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Amaranthaceae:

    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 - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    11/100

  • Grass (Poaceae):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Amaranthaceae:

    None

    0/100

Air quality in Porto Alegre

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Frequently Asked Questions

Is pollen high in Porto Alegre right now?

On 16 July 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 17 July 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 are expected to gradually decrease, suggesting improving conditions later in the week.

Which pollen types are currently active in Porto Alegre?

On 16 July 2026, Cypress is the dominant pollen source in Porto Alegre. amaranthaceae and willow are not currently active.

When is pollen season in Porto Alegre?
Porto Alegre's pollen season is most pronounced during the dry season from April to September in the subtropical climate. Eucalyptus, pine, and native Atlantic Forest species contribute tree pollen through winter and spring, with grass peaking from August through November in the Southern Hemisphere spring. The temperate subtropical setting means the season is more defined than in tropical Brazilian cities, with the wet summer providing some relief.
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?

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Check pollen in other popular cities:

Rio de Janeiro Copenhagen Athens Denpasar Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Porto Alegre.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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