Rhondda pollen forecast - today, tomorrow and the week ahead

Today (25 June) pollen in Rhondda is high; grass is high; cypress is low. Tomorrow (26 June 2026) levels are similar - grass declining. Over the following five days cypress and grass will increase. 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

Rhondda's valley setting features oak and birch as the main tree pollen sources in parks and along the Rhondda River corridor, with exposure varying between wooded valley sides and the more built-up valley floor communities. Surrounding South Wales farmland and the Brecon Beacons moorland contribute substantial grass and heather pollen, while Atlantic weather systems bring frequent rainfall that periodically interrupts the season throughout.

Today - 25 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    17/100

  • Grass (Poaceae):

    High

    63/100

  • Willow (Salicaceae):

    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 - 26 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Medium

    34/100

  • Willow (Salicaceae):

    None

    0/100

Frequently Asked Questions

Is pollen high in Rhondda right now?

On 25 June 2026, overall pollen levels in Rhondda are high. Grass is the main contributor to airborne pollen, while cypress remain at lower levels

Will pollen levels change in Rhondda tomorrow?

On 26 June 2026, pollen conditions in Rhondda will be different from today, with grass continuing to decline

Is pollen expected to decrease in Rhondda this week?

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

Which pollen types are currently active in Rhondda?

On 25 June 2026, Grass is the dominant pollen source in Rhondda. cypress are also present but at lower levels. willow, alder, birch, and hazel are not currently active.

When is pollen season in Rhondda?
Rhondda's pollen season opens with hazel and alder from February, slightly later than southern UK cities due to the cooler, wetter South Wales valleys climate. Birch and oak follow through April and May, with grass peaking through June and July. The Rhondda valley concentrates pollen under calm conditions, while Atlantic weather systems bring very frequent rainfall that regularly interrupts the season throughout.
How often is the Rhondda pollen forecast updated?

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

Does pollen in Rhondda 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 Rhondda 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 Rhondda, 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:

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

Data provided by Airmine — Last update: 25 Jun 2026, 09:02 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for Rhondda.

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

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