Wales pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (2 September) pollen in Wales is high; ragweed is high; grass is moderate; mugwort is low.
Pollen Tomorrow
Tomorrow (3 September 2026) mugwort remains low, grass declining, ragweed declining.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase; cypress will remain stable.
Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset. Airmine's estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily. Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS) team.
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Pollen Risk
Today - 2 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) | Moderate | 44/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 25/100 |
| Ragweed (Ambrosia) | High | 70/100 |
Tomorrow - 3 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 | 23/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 4/100 | |
| Ragweed (Ambrosia) | Moderate | 49/100 |
Local Environmental Conditions
At Wales, woods composed largely of oak and birch, a combination tied to sharp spring pollen spikes; this sits within the neighborhood. Here, in the wider area, a green space where lawn grass and ornamental plantings top up the local grass and ragweed count. Actual counts still shift year to year with temperature, rainfall, and prevailing wind.
At Wales, the area's oak and birch trees pollinate through mid-to-late spring, climbing steadily through spring to a peak in April or May. As spring turns to summer, grass pollen rises toward its June high, before ragweed takes over as the dominant allergen from mid-August through October. This general pattern holds fairly steady across the surrounding county from year to year.
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Resource Hub
Sports venues in Wales 1 sports venue
Frequently Asked Questions About Pollen in Wisconsin
Is pollen high in Wales right now?
On 2 September 2026, overall pollen levels in Wales are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Wales tomorrow?
On 3 September 2026, pollen conditions in Wales will be different from today, with artemisia at low levels and ambrosia, grass continuing to decline
Is pollen expected to decrease in Wales this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Wales?
On 2 September 2026, Ambrosia is the dominant pollen source in Wales. grass and artemisia are also present but at lower levels. cypress are not currently active.
When is pollen season in Wales?
How often is the Wales pollen forecast updated?
The Wales pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Wales 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 Wales 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 Wales, 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 exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen 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).
