Caerphilly pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Caerphilly is low; grass is low. Tomorrow (17 July 2026) levels are similar - grass remains low, cypress at low levels. Over the following five days cypress will increase; grass will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

Use our Strava plugin to check your own exposure.

How to connect?

Residents in Caerphilly dealing with hay fever usually point to birch and oak as the culprits, particularly in spring near parks and gardens. The the river meadows nearby is a notable secondary source, feeding pollen into town whenever the wind shifts to the south. Hay fever sufferers here typically notice symptoms peaking in late spring, then again during the summer grass season.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    12/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

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 - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    2/100

  • Grass (Poaceae):

    Low

    13/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

Air quality in Caerphilly

View air quality

Frequently Asked Questions

Is pollen high in Caerphilly right now?

On 16 July 2026, overall pollen levels in Caerphilly are low. Grass is the main contributor to airborne pollen

Will pollen levels change in Caerphilly tomorrow?

On 17 July 2026, pollen conditions in Caerphilly will be different from today, with cypress at low levels, grass at low levels

Is pollen expected to decrease in Caerphilly this week?

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.

Which pollen types are currently active in Caerphilly?

On 16 July 2026, Grass is the dominant pollen source in Caerphilly. artemisia, birch, hazel, cypress, willow, and alder are not currently active.

When is pollen season in Caerphilly?
For Caerphilly, the season kicks off with birch and then hands things over to oak. Birch gets going around March and tapers off by May, while oak follows on from April to May. Grass then takes over from May right through September, peaking around June and July for most people. Not a bad idea to stock up on antihistamines before it all kicks off.
How often is the Caerphilly pollen forecast updated?

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

Does pollen in 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 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 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?

Birmingham Bristol Glasgow Leeds Liverpool London Manchester Portsmouth Sheffield Southampton

Check pollen in other popular cities:

Rio de Janeiro Copenhagen Athens Denpasar Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Caerphilly.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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