Feltham pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Feltham 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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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 | 41/100 |
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 | 53/100 |
Local Environmental Conditions
Feltham sees plane and lime as the leading tree pollen contributors, with levels differing noticeably between well-vegetated suburbs and the denser core. Local farmland and hedgerows nearby add meaningful grass pollen through late spring and summer, especially under the region's typical south-westerlies. Hay fever sufferers here typically notice symptoms peaking in late spring, then again during the summer grass season.
Want to know what triggers spring allergies in Feltham? Start with plane, then lime. Grass pollen then stretches from May into September, with the worst of it typically landing in June and July. You'll usually see plane pollen from around April through June, with lime picking up between May and July. Worth keeping an eye on the forecast if you're sensitive.
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Frequently Asked Questions About Pollen in Hounslow
Is pollen high in Feltham right now?
On 20 September 2026, overall pollen levels in Feltham are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Feltham tomorrow?
On 21 September 2026, pollen conditions in Feltham will be different from today, with artemisia increasing
Is pollen expected to decrease in Feltham this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Feltham?
On 20 September 2026, Artemisia is the dominant pollen source in Feltham. cypress, grass, and willow are not currently active.
When is pollen season in Feltham?
How often is the Feltham pollen forecast updated?
The Feltham pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Feltham 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 Feltham 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 Feltham, 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).
