Walton upon Thames pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Walton upon Thames is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort increasing.
7-Day Trend
Over the next week mugwort will increase; 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) | Moderate | 42/100 |
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 | 52/100 |
Local Environmental Conditions
Walton upon Thames's parks and green spaces feature oak and plane as the main tree pollen sources, with exposure varying between these greener areas and the more built-up town centre. Grass pollen from surrounding Surrey fields is significant through the summer months, carried in by light prevailing breezes. This mix of urban and rural influence gives Walton upon Thames a fairly typical pollen pattern for the wider region.
So here's the rundown for Walton upon Thames: oak pollen shows up first, then plane takes over. Grass pollen then stretches from May into September, with the worst of it typically landing in June and July. Oak gets going around April and tapers off by May, while plane follows on from April to June. Worth keeping an eye on the forecast if you're sensitive.
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Frequently Asked Questions About Pollen in Surrey
Is pollen high in Walton upon Thames right now?
On 20 September 2026, overall pollen levels in Walton upon Thames are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Walton upon Thames tomorrow?
On 21 September 2026, pollen conditions in Walton upon Thames will be different from today, with artemisia increasing
Is pollen expected to decrease in Walton upon Thames this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Walton upon Thames?
On 20 September 2026, Artemisia is the dominant pollen source in Walton upon Thames. grass, willow, and cypress are not currently active.
When is pollen season in Walton upon Thames?
How often is the Walton upon Thames pollen forecast updated?
The Walton upon Thames pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Walton upon Thames 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 Walton upon Thames 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 Walton upon Thames, 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).
