Santander pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Santander is high; mugwort is high; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will increase; grass will decrease; cypress and willow will remain stable.
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Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| 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) | Low | 10/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | High | 70/100 |
Tomorrow - 21 September
| 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) | Low | 9/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | High | 70/100 |
Local Environmental Conditions
Santander's coastal parks and the Bahía de Santander waterfront feature oak, birch, and eucalyptus as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Cantabrian woodland and farmland contribute substantial tree and grass pollen, while the very wet Atlantic Cantabrian climate means frequent rainfall provides regular interruptions throughout the season.
Santander's pollen season opens in January with hazel and alder before birch and oak peak through April and May. Grass peaks through June and July. The very wet Atlantic Cantabrian climate means Santander is one of the most frequently interrupted pollen seasons in Spain, with frequent onshore Bay of Biscay winds and rainfall providing regular interruptions throughout.
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Resource Hub
Pollen forecast neighborhoods 3 neighborhoods
Frequently Asked Questions About Pollen in Cantabria
Is pollen high in Santander right now?
On 20 September 2026, overall pollen levels in Santander are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Santander tomorrow?
On 21 September 2026, pollen conditions in Santander will be similar to today, with artemisia at high levels, grass at low levels
Is pollen expected to decrease in Santander this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, while artemisia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Santander?
On 20 September 2026, Artemisia is the dominant pollen source in Santander. grass are also present but at lower levels. cypress and willow are not currently active.
When is pollen season in Santander?
How often is the Santander pollen forecast updated?
The Santander pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Santander 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 Santander 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 Santander, 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 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
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).
