Barri pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Barri is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort remains moderate, grass at low levels.
7-Day Trend
Over the next week grass and mugwort 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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 27/100 |
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 | 2/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | Moderate | 43/100 |
Local Environmental Conditions
Local farmland and hedgerows nearby add meaningful grass pollen through late spring and summer, especially under the area's changeable Atlantic weather. On top of that, oak and beech are the two species driving most tree pollen in Barri, especially around parks and green corridors. It's a pattern shared by plenty of similarly sized towns nearby, shaped more by geography than anything unusual locally.
Barri's pollen year has two main tree culprits: oak first, beech close behind. Grass season overlaps a lot of this too, running May through September and peaking mid-summer. Oak gets going around April and tapers off by May, and beech keeps things going from April right through to May. Worth keeping an eye on the forecast if you're sensitive.
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Frequently Asked Questions About Pollen in Vale of Glamorgan, The
Is pollen high in Barri right now?
On 20 September 2026, overall pollen levels in Barri are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Barri tomorrow?
On 21 September 2026, pollen conditions in Barri will be different from today, with artemisia at moderate levels, grass at low levels
Is pollen expected to decrease in Barri this week?
According to the five-day outlook, artemisia and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Barri?
On 20 September 2026, Artemisia is the dominant pollen source in Barri. cypress, grass, and willow are not currently active.
When is pollen season in Barri?
How often is the Barri pollen forecast updated?
The Barri pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Barri 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 Barri 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 Barri, 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).
