Brighton pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Brighton is high; mugwort is high.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort declining.
7-Day Trend
Over the next week grass and mugwort will increase; cypress and willow will remain stable.
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Local pollen and air quality forecasts, interactive pollen maps and route profiles
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) | High | 56/100 |
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) | Moderate | 49/100 |
Local Environmental Conditions
This combination means residents feel both urban and rural pollen sources depending on which way the wind's blowing. That's on top of plane and lime, which are the main local tree pollen sources around Brighton's parks and quieter streets. The nearby stretch of open moorland adds further grass and tree pollen exposure, particularly under onshore breezes.
The tree pollen story in Brighton is really about plane and lime, in that order. 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. Plane gets going around April and tapers off by June, then lime carries on from May until July. Good to know if you're planning anything outdoors that time of year.
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Resource Hub
Local parkruns 33 parkruns
Local events 1 event
Frequently Asked Questions About Pollen in Brighton and Hove
Is pollen high in Brighton right now?
On 20 September 2026, overall pollen levels in Brighton are high. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Brighton tomorrow?
On 21 September 2026, pollen conditions in Brighton will be different from today, with artemisia continuing to decline
Is pollen expected to decrease in Brighton this week?
According to the five-day outlook, artemisia and grass pollen levels will increase later in the week.
Which pollen types are currently active in Brighton?
On 20 September 2026, Artemisia is the dominant pollen source in Brighton. cypress, grass, and willow are not currently active.
When is pollen season in Brighton?
How often is the Brighton pollen forecast updated?
The Brighton pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Brighton 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 Brighton 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 Brighton, 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).
