Cambridge pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Cambridge is low; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort increasing.
7-Day Trend
Over the next week cypress, grass, willow, and mugwort 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) | Low | 25/100 |
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 | 43/100 |
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 oak and plane, which are the main local tree pollen sources around Cambridge's parks and quieter streets. Surrounding Cambridgeshire farmland contributes substantial grass and tree pollen, moving into town when winds blow from the west.
If you're wondering when hay fever kicks off in Cambridge, it's mostly down to oak and plane. Oak tends to release pollen between April and May, then plane carries on from April until June. Don't forget grass, either — it runs May to September and usually causes the most trouble in June and July. Useful to know if you tend to feel it every spring.
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Resource Hub
Pollen forecast neighborhoods 1 neighborhood
Local parkruns 29 parkruns
Local events 1 event
Frequently Asked Questions About Pollen in Cambridgeshire
Is pollen high in Cambridge right now?
On 20 September 2026, overall pollen levels in Cambridge are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Cambridge tomorrow?
On 21 September 2026, pollen conditions in Cambridge will be different from today, with artemisia increasing
Is pollen expected to decrease in Cambridge this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Cambridge?
On 20 September 2026, Artemisia is the dominant pollen source in Cambridge. cypress, grass, and willow are not currently active.
When is pollen season in Cambridge?
How often is the Cambridge pollen forecast updated?
The Cambridge pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Cambridge 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 Cambridge 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 Cambridge, 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).
