Cwmafan pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Cwmafan is low; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort increasing, grass at low levels.
7-Day Trend
Over the next week grass will increase; mugwort will decrease; 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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 18/100 |
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 | 6/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | Moderate | 40/100 |
Local Environmental Conditions
Seasonal peaks tend to track the wider regional pattern, tree pollen leading in spring and grass through summer. That's on top of ash and hazel, which are the main local tree pollen sources around Cwmafan's parks and quieter streets. The wider Neath Port Talbot countryside supplies additional tree and grass pollen, particularly when inland breezes from the surrounding countryside carry it toward the built-up area.
Ask anyone with allergies in Cwmafan and they'll tell you it's ash and hazel that cause the trouble. Then grass pollen takes the baton from May all the way to September, usually peaking in June and July — that's when most people really feel it. Expect ash pollen roughly from March to May, with hazel picking up between January and April. Handy to bear in mind before booking that garden party.
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Frequently Asked Questions About Pollen in Neath Port Talbot
Is pollen high in Cwmafan right now?
On 20 September 2026, overall pollen levels in Cwmafan are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Cwmafan tomorrow?
On 21 September 2026, pollen conditions in Cwmafan will be different from today, with grass at low levels and artemisia increasing
Is pollen expected to decrease in Cwmafan this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, while grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Cwmafan?
On 20 September 2026, Artemisia is the dominant pollen source in Cwmafan. grass, willow, and cypress are not currently active.
When is pollen season in Cwmafan?
How often is the Cwmafan pollen forecast updated?
The Cwmafan pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Cwmafan 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 Cwmafan 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 Cwmafan, 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. |
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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).
