Sintra pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Sintra is high; grass is high. Tomorrow (26 June 2026) levels are similar. Over the following five days grass 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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Sintra's parks, including Parque da Pena and the Sintra Mountain woodland, feature oak, pine, and chestnut as the main tree pollen sources, with exposure varying between these green areas and the more built-up town centre. The Atlantic-facing position means onshore winds frequently disperse pollen, while the surrounding Sintra-Cascais Natural Park contributes substantial tree and grass pollen across the area.
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):
High
57/100
-
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):
High
64/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Sintra right now?
On 25 June 2026, overall pollen levels in Sintra are high. Grass is the main contributor to airborne pollen
Will pollen levels change in Sintra tomorrow?
On 26 June 2026, pollen conditions in Sintra will be similar to today, with grass at high levels
Is pollen expected to decrease in Sintra this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Sintra?
On 25 June 2026, Grass is the dominant pollen source in Sintra. willow, alder, birch, hazel, and cypress are not currently active.
When is pollen season in Sintra?
How often is the Sintra pollen forecast updated?
The Sintra pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Sintra 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 Sintra 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 Sintra, 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 Sintra.
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.