Boulogne-sur-Mer Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Boulogne-sur-Mer is low; mold (alternaria) and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) mold (alternaria) remains low, mold (cladosporium) remains low, mugwort at low levels.
7-Day Trend
Over the next week mold (alternaria) will increase; mugwort and mold (cladosporium) will decrease; cypress, grass, and willow 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 | 8/100 |
| Mold (Cladosporium) | Low | 22/100 |
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) | Low | 14/100 | |
| Mold (Alternaria) | Low | 8/100 | |
| Mold (Cladosporium) | Low | 23/100 |
Local Environmental Conditions
The center of Boulogne-sur-Mer is surrounded mainly by built-up land, with a good deal of woodland. Allergenic trees nearby include willow, maple and alder. Grass pollen is plentiful, while pigweed and plantain lead among the weeds. Around here, planted trees and mown lawns are the main sources in the built-up parts.
First to flower is alder, in late winter. Tree pollen peaks in mid-spring, when the weather warms to around 10°C and willow and maple are in full flower. Then come the grasses, strongest in early summer and fading by early fall. Later, pigweed and plantain keep weed pollen in the air from midsummer into mid-fall.
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Frequently Asked Questions About Pollen in Hauts-de-France
Is pollen high in Boulogne-sur-Mer right now?
Currently, there is no significant pollen in Boulogne-sur-Mer.
Will pollen levels change in Boulogne-sur-Mer tomorrow?
On 11 October 2026, pollen conditions in Boulogne-sur-Mer will be different from today, with artemisia at low levels
Is pollen expected to decrease in Boulogne-sur-Mer 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 Boulogne-sur-Mer?
On 10 October 2026, there are no significant pollen types in Boulogne-sur-Mer.
When is pollen season in Boulogne-sur-Mer?
How often is the Boulogne-sur-Mer pollen forecast updated?
The Boulogne-sur-Mer pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Boulogne-sur-Mer 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 Boulogne-sur-Mer 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 Boulogne-sur-Mer, 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).
