Brecon pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in Brecon are low. Cypress is the main contributor to airborne pollen, while grass remain at lower levels

On 17 July 2026, pollen conditions in Brecon will be similar to today, with cypress at low levels, grass at low levels

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

On 16 July 2026, Cypress is the dominant pollen source in Brecon. grass are also present but at lower levels. alder, artemisia, birch, hazel, and willow are not currently active.

Want to know what triggers spring allergies in Brecon? Start with ash, then hazel. 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. Ash pollen typically runs from March to May, before hazel takes over, usually January to April. Handy to bear in mind before booking that garden party.

The Brecon 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 Brecon, 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.