San Sebastián de los Reyes pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in San Sebastián de los Reyes is low; grass is low. Tomorrow (26 June 2026) levels are similar - grass increasing. 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
San Sebastián de los Reyes' urban green spaces and the Jarama River corridor feature oak, pine, and ash as the main tree pollen sources, with exposure varying between these areas and the more built-up suburban city centre. Surrounding Castilian farmland and the semi-arid Meseta landscape contribute substantial grass and crop pollen, while the dry continental climate concentrates pollen dispersal during the spring 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
22/100
-
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):
Medium
39/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in San Sebastián de los Reyes right now?
On 25 June 2026, overall pollen levels in San Sebastián de los Reyes are low. Grass is the main contributor to airborne pollen
Will pollen levels change in San Sebastián de los Reyes tomorrow?
On 26 June 2026, pollen conditions in San Sebastián de los Reyes will be different from today, with grass increasing
Is pollen expected to decrease in San Sebastián de los Reyes this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in San Sebastián de los Reyes?
On 25 June 2026, Grass is the dominant pollen source in San Sebastián de los Reyes. cypress, willow, alder, birch, and hazel are not currently active.
When is pollen season in San Sebastián de los Reyes?
How often is the San Sebastián de los Reyes pollen forecast updated?
The San Sebastián de los Reyes pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in San Sebastián de los Reyes 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 San Sebastián de los Reyes 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 San Sebastián de los Reyes, 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 Spain?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 25 Jun 2026, 09:00 CET (Data is updated four times daily.)
This page provides the latest public pollen forecast for San Sebastián de los Reyes.
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.