Llantrisant pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Llantrisant 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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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Around Llantrisant, ash and hazel are the dominant species behind local tree pollen, with counts higher near parks than in the centre. The wider Rhondda Cynon Taf countryside supplies additional tree and grass pollen, particularly when prevailing westerlies carry it toward the built-up area. This mix of urban and rural influence gives Llantrisant a fairly typical pollen pattern for the wider region.
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
9/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
High
51/100
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 Llantrisant
View air qualityFrequently Asked Questions
Is pollen high in Llantrisant right now?
On 9 August 2026, overall pollen levels in Llantrisant are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Llantrisant tomorrow?
On 10 August 2026, pollen conditions in Llantrisant will be different from today, with artemisia continuing to decline
Is pollen expected to decrease in Llantrisant 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 Llantrisant?
On 9 August 2026, Artemisia is the dominant pollen source in Llantrisant. grass are also present but at lower levels. willow, hazel, and cypress are not currently active.
When is pollen season in Llantrisant?
How often is the Llantrisant pollen forecast updated?
The Llantrisant pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Llantrisant 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 Llantrisant 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 Llantrisant, 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?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Llantrisant.
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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.