London Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (16 October) pollen in London is low; mold (alternaria) and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (17 October 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will increase; mold (cladosporium) will decrease; grass, willow, and mold (alternaria) will remain stable.
Explore Forecasts
Air Quality & Mold
Pollen for Neighborhoods
Pollen & AQ for Routes
Get More in Our App
Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
Pollen Risk
Today - 16 October
| 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) | None | 0/100 |
| Mold (Alternaria) | Low | 4/100 |
| Mold (Cladosporium) | Low | 20/100 |
Tomorrow - 17 October
| 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) | None | 0/100 | |
| Mold (Alternaria) | Low | 3/100 | |
| Mold (Cladosporium) | Low | 17/100 |
Local Environmental Conditions
London's pollen comes mostly from its trees and green spaces. London plane makes up over half of the trees in central London, lining streets, squares and the Thames Embankment, while oak, birch, ash and lime (linden) grow in the Royal Parks, Hampstead Heath and the city's many commons. Lawns, playing fields and the meadows of the larger parks supply grass pollen, the main cause of hay fever in London, and nettle and mugwort grow on waste ground, railway banks and roadside verges.
London's pollen year starts early, as mild winters averaging around 6°C in January let hazel and alder flower from February. Birch follows in April, with oak and London plane peaking in May, when plane pollen is especially high in central London. Grass pollen builds from late May and is usually at its worst in June and July, as temperatures average around 19°C. Nettle and mugwort keep weed pollen in the air until September, and London's pollen season is usually over by October.
Get pollen & AQ on Strava
Follow your environmental exposure and performance with the free Airmine-Strava integration. See your pollen and air quality exposure for every Strava activity.
Resource Hub
Pollen forecast neighborhoods 31 neighborhoods
Popular Local Routes 12 routes
Local parkruns 334 parkruns
Local events 18 events
Frequently Asked Questions About Pollen in London, City of
Is pollen high in London right now?
Currently, there is no significant pollen in London.
Will pollen levels change in London tomorrow?
On 17 October 2026, pollen conditions in London will be similar to today with no significant pollen expected.
Is pollen expected to decrease in London this week?
According to the five-day outlook, mugwort pollen levels will increase later in the week.
Which pollen types are currently active in London?
On 16 October 2026, there are no significant pollen types in London.
When is pollen season in London?
How often is the London pollen forecast updated?
The London pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in London 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 London 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 London, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
