Bastia pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Bastia is high; mugwort is high; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort remains high, grass no longer expected.
7-Day Trend
Over the next week grass and mugwort will increase; cypress and willow will remain stable.
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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 | 9/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | High | 63/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | High | 56/100 |
Local Environmental Conditions
Bastia's tree cover, concentrated in parks and along the Gravona, is dominated by pine and chestnut. The Corsican maquis scrubland and terraced farmland nearby are a major source of grass pollen later in the season, and the Mediterranean island climate creates some local variation in exposure through the season.
Bastia sees its pollen season begin in late winter, with olive and maquis scrub the first to appear, before pine and chestnut pollen takes over through April and May, before grass from island farmland then carries the season into early summer, typical of this Mediterranean island part of France.
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Frequently Asked Questions About Pollen in Corsica
Is pollen high in Bastia right now?
On 20 September 2026, overall pollen levels in Bastia are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Bastia tomorrow?
On 21 September 2026, pollen conditions in Bastia will be different from today, with artemisia at high levels
Is pollen expected to decrease in Bastia this week?
According to the five-day outlook, grass and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Bastia?
On 20 September 2026, Artemisia is the dominant pollen source in Bastia. grass are also present but at lower levels. cypress and willow are not currently active.
When is pollen season in Bastia?
How often is the Bastia pollen forecast updated?
The Bastia pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Bastia 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 Bastia 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 Bastia, 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).
