Nelson Caerphilly pollen forecast - today, tomorrow and the week ahead

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

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Residents in Nelson Caerphilly dealing with hay fever usually point to alder and oak as the culprits, particularly in spring near parks and gardens. Grass pollen from surrounding Caerphilly fields is significant through the summer months, carried in by the dominant maritime airflow. 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):

    Low

    10/100

  • Grass (Poaceae):

    Low

    10/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    High

    52/100

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

    37/100

Air quality in Nelson Caerphilly

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Frequently Asked Questions

Is pollen high in Nelson Caerphilly right now?

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

Will pollen levels change in Nelson Caerphilly tomorrow?

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

Is pollen expected to decrease in Nelson Caerphilly 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 Nelson Caerphilly?

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

When is pollen season in Nelson Caerphilly?
In Nelson Caerphilly, the pollen calendar starts with birch and rolls straight into oak. Grass season overlaps a lot of this too, running May through September and peaking mid-summer. Expect birch pollen roughly from March to May, with oak picking up between April and May. Useful to know if you tend to feel it every spring.
How often is the Nelson Caerphilly pollen forecast updated?

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

Does pollen in Nelson Caerphilly 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 Nelson Caerphilly 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 Nelson Caerphilly, 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 Nelson Caerphilly.

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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.