London pollen forecast — RHS Wisley Gardens neighborhood

On 26 June 2026, overall pollen levels in London are moderate. Grass is the main contributor to airborne pollen, while cypress remain at lower levels

On 27 June 2026, pollen conditions in London will be different from today, with grass continuing to decline

According to the five-day outlook, cypress and grass pollen levels will increase later in the week.

On 26 June 2026, Grass is the dominant pollen source in London. cypress are also present but at lower levels. willow, alder, birch, and hazel are not currently active.

London RHS Wisley Gardens occupies the Royal Horticultural Society's flagship garden in Surrey, where the exceptional horticultural collection contributes an extraordinarily diverse range of pollen sources across thousands of cultivated species. The enclosed garden setting concentrates pollen under certain conditions, while birch peaks through April and May, grass from the garden's meadow areas peaks through June and July, and mugwort extends into September throughout this world-renowned Surrey horticultural garden.

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.