San Sebastián de los Reyes Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in San Sebastián de los Reyes is low; mold (alternaria) and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) mold (alternaria) remains low, mold (cladosporium) increasing.
7-Day Trend
Over the next week mold (alternaria) and mold (cladosporium) will decrease; cypress, grass, willow, and mugwort will remain stable.
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Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| 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 |
| Mugwort (Artemisia) | None | 0/100 |
| Mold (Alternaria) | Low | 13/100 |
| Mold (Cladosporium) | Low | 18/100 |
Tomorrow - 11 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| 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 | |
| Mugwort (Artemisia) | None | 0/100 | |
| Mold (Alternaria) | Low | 18/100 | |
| Mold (Cladosporium) | Moderate | 26/100 |
Local Environmental Conditions
Around 78% of the area near the heart of San Sebastián de los Reyes is built-up land, with some woodland. The key allergenic tree nearby is oak. Beyond the trees, grasses matter a great deal, and plantain is the main weed source. Compared with most places, oak is especially widespread here, which makes it one of the key local allergens.
Oak leads the season in mid-spring, as temperatures climb to around 10°C, and tree pollen reaches its peak. Then come the grasses, strongest in late spring and fading by early fall. Plantain brings a final peak from mid-spring into early fall. The oak period in mid-spring is usually the most intense time of year here.
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Frequently Asked Questions About Pollen in Madrid
Is pollen high in San Sebastián de los Reyes right now?
Currently, there is no significant pollen in San Sebastián de los Reyes.
Will pollen levels change in San Sebastián de los Reyes tomorrow?
On 11 October 2026, pollen conditions in San Sebastián de los Reyes will be similar to today with no significant pollen expected.
Is pollen expected to decrease in San Sebastián de los Reyes this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in San Sebastián de los Reyes?
On 10 October 2026, there are no significant pollen types in San Sebastián de los Reyes.
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.
Understanding the Scale
The 0–100 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
