La Rochelle pollen forecast — Stade Marcel-Deflandre neighborhood
Pollen Today
Today (20 September) pollen in Stade Marcel-Deflandre, La Rochelle is high; mugwort is high.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will decrease; cypress, grass, 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) | None | 0/100 |
| 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 | 68/100 |
Local Environmental Conditions
Stade Marcel-Deflandre sits amid vegetation dominated by oak and plane, with surrounding vineyard land and the Landes pine forest contributing additional grass pollen. The oceanic-continental climate here shapes the overall seasonal pattern.
hazel and alder mark the start of the pollen season, building through late winter, tapering off as oak and plane pollen takes over across April through June, before grass from vineyard and farmland extends the season into early summer. The oceanic-continental climate of the region shapes the overall pattern, and conditions at Stade Marcel-Deflandre generally track the broader trend for this part of France.
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Resource Hub
Sports venues in La Rochelle 1 sports venue
Frequently Asked Questions About Pollen in Nouvelle-Aquitaine
Is pollen high in La Rochelle right now?
On 20 September 2026, overall pollen levels in La Rochelle are high. Artemisia is the main contributor to airborne pollen
Will pollen levels change in La Rochelle tomorrow?
On 21 September 2026, pollen conditions in La Rochelle will be similar to today, with artemisia at high levels
Is pollen expected to decrease in La Rochelle this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in La Rochelle?
On 20 September 2026, Artemisia is the dominant pollen source in La Rochelle. cypress, grass, and willow are not currently active.
When is pollen season in La Rochelle?
How often is the La Rochelle pollen forecast updated?
The La Rochelle pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in La Rochelle 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 La Rochelle 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 La Rochelle, 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).
