London pollen forecast — RHS Wisley Gardens neighborhood

On 21 July 2026, overall pollen levels in London are low. Artemisia is the main contributor to airborne pollen, while cypress and grass remain at lower levels

On 22 July 2026, pollen conditions in London will be similar to today, with artemisia at low levels, cypress at low levels, grass at low levels

According to the five-day outlook, cypress and grass pollen levels are expected to gradually decrease, while artemisia pollen will increase, suggesting mixed conditions later in the week.

On 21 July 2026, Artemisia is the dominant pollen source in London. cypress and grass are also present but at lower levels. birch, hazel, willow, and alder are not currently active.

For RHS Wisley Gardens, the season kicks off with oak and then hands things over to beech. Expect oak pollen roughly from April to May, with beech picking up between April and May. On top of that, grass pollen runs May to September and tends to hit hardest in June and July. Handy to bear in mind before booking that garden party.

The London pollen forecast is updated four times daily. See the timestamp below for the most recent update.

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.

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.