Rio Tinto pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Rio Tinto is low; grass is low. Tomorrow (26 June 2026) levels are similar. 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
Rio Tinto's Leça River corridor and surrounding Minho highland landscape feature oak, pine, and eucalyptus as the main tree pollen sources in this Porto suburban municipality. Surrounding 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):
Low
20/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Rio Tinto right now?
On 25 June 2026, overall pollen levels in Rio Tinto are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Rio Tinto tomorrow?
On 26 June 2026, pollen conditions in Rio Tinto will be similar to today, with grass at low levels
Is pollen expected to decrease in Rio Tinto this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in Rio Tinto?
On 25 June 2026, Grass is the dominant pollen source in Rio Tinto. alder, birch, hazel, cypress, and willow are not currently active.
When is pollen season in Rio Tinto?
How often is the Rio Tinto pollen forecast updated?
The Rio Tinto pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rio Tinto 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 Rio Tinto 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 Rio Tinto, 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, 09:01 CET (Data is updated four times daily.)
This page provides the latest public pollen forecast for Rio Tinto.
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.