São Sebastião pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in São Sebastião is low; cypress and willow are low. Tomorrow (10 August 2026) levels are similar. Over the following five days cypress and willow 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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São Sebastião occupies the São Paulo northern coast at the entry to the Serra do Mar as a port and resort municipality facing Ilhabela, where native Atlantic Forest trees, restinga coastal scrub, and the dramatic escarpment vegetation are the main pollen sources. The very wet Atlantic Forest coastal climate provides very frequent rainfall interruptions, while the tropical climate supports year-round pollen production throughout this important São Paulo northern coastal municipality.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
4/100
-
Grass (Poaceae):
None
0/100
-
Willow (Salicaceae):
Low
3/100
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
Air quality in São Sebastião
View air qualityFrequently Asked Questions
Is pollen high in São Sebastião right now?
On 9 August 2026, overall pollen levels in São Sebastião are low. Cypress is the main contributor to airborne pollen, while willow remain at lower levels
Will pollen levels change in São Sebastião tomorrow?
On 10 August 2026, pollen conditions in São Sebastião will be similar to today with no significant pollen expected.
Is pollen expected to decrease in São Sebastião this week?
According to the five-day outlook, cypress and willow pollen levels will increase later in the week.
Which pollen types are currently active in São Sebastião?
On 9 August 2026, Cypress is the dominant pollen source in São Sebastião. willow are also present but at lower levels.
When is pollen season in São Sebastião?
How often is the São Sebastião pollen forecast updated?
The São Sebastião pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in São Sebastião 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 São Sebastião 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 São Sebastião, 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 São Sebastião.
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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.