Thornbury Gloucestershire pollen forecast - today, tomorrow and the week ahead

Today (9 August) pollen in Thornbury Gloucestershire is high; mugwort is high; grass is low. Tomorrow (10 August 2026) levels are similar - mugwort declining. Over the following five days grass and mugwort will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

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Thornbury Gloucestershire's parks and green spaces feature oak and birch as the main tree pollen sources, with exposure varying between these greener areas and the more built-up town centre. Grass pollen from surrounding Gloucestershire fields is significant through the summer months, carried in by northwesterly winds off the coast. Hay fever sufferers here typically notice symptoms peaking in late spring, then again during the summer grass season.

Today - 9 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    14/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    High

    55/100

High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.

Tomorrow - 10 August

  • 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):

    Medium

    34/100

Air quality in Thornbury Gloucestershire

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Frequently Asked Questions

Is pollen high in Thornbury Gloucestershire right now?

On 9 August 2026, overall pollen levels in Thornbury Gloucestershire are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels

Will pollen levels change in Thornbury Gloucestershire tomorrow?

On 10 August 2026, pollen conditions in Thornbury Gloucestershire will be different from today, with artemisia continuing to decline

Is pollen expected to decrease in Thornbury Gloucestershire this week?

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

Which pollen types are currently active in Thornbury Gloucestershire?

On 9 August 2026, Artemisia is the dominant pollen source in Thornbury Gloucestershire. grass are also present but at lower levels. hazel, cypress, and willow are not currently active.

When is pollen season in Thornbury Gloucestershire?
So here's the rundown for Thornbury Gloucestershire: oak pollen shows up first, then birch takes over. Expect oak pollen roughly from April to May, then birch carries on from March until May. Grass season overlaps a lot of this too, running May through September and peaking mid-summer. Handy to bear in mind before booking that garden party.
How often is the Thornbury Gloucestershire pollen forecast updated?

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

Does pollen in Thornbury Gloucestershire 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 Thornbury Gloucestershire 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 Thornbury Gloucestershire, 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.

Want to see pollen forecasts for other cities in United Kingdom?

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Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Thornbury Gloucestershire.

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Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.