Castle Cary pollen forecast - today, tomorrow and the week ahead

Today (9 August) pollen in Castle Cary 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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Tree pollen in Castle Cary comes mostly from oak and birch, with parks and mature gardens standing in contrast to the more built-up centre. Fields and hedgerows just outside town push grass pollen counts up noticeably once shifting coastal winds set in. This combination means residents feel both urban and rural pollen sources depending on which way the wind's blowing.

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

    13/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    High

    54/100

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

    39/100

Air quality in Castle Cary

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Frequently Asked Questions

Is pollen high in Castle Cary right now?

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

Will pollen levels change in Castle Cary tomorrow?

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

Is pollen expected to decrease in Castle Cary 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 Castle Cary?

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

When is pollen season in Castle Cary?
Ask anyone with allergies in Castle Cary and they'll tell you it's oak and birch that cause the trouble. Oak pollen typically runs from April to May, before birch takes over, usually March to May. Don't forget grass, either — it runs May to September and usually causes the most trouble in June and July. Useful to know if you tend to feel it every spring.
How often is the Castle Cary pollen forecast updated?

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

Does pollen in Castle Cary 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 Castle Cary 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 Castle Cary, 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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Check pollen in other popular cities:

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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 Castle Cary.

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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.

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.