Colwyn Bay pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Colwyn Bay is low; cypress and grass are low. Tomorrow (17 July 2026) levels are similar. 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

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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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Colwyn Bay sees alder and oak as the leading tree pollen contributors, with levels differing noticeably between well-vegetated suburbs and the denser core. The nearby the river meadows adds further grass and tree pollen exposure, particularly under moist Atlantic fronts. It's a pattern shared by plenty of similarly sized towns nearby, shaped more by geography than anything unusual locally.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    9/100

  • Grass (Poaceae):

    Low

    13/100

  • 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

    10/100

  • Grass (Poaceae):

    Low

    14/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

Air quality in Colwyn Bay

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Frequently Asked Questions

Is pollen high in Colwyn Bay right now?

On 16 July 2026, overall pollen levels in Colwyn Bay are low. Cypress is the main contributor to airborne pollen, while grass remain at lower levels

Will pollen levels change in Colwyn Bay tomorrow?

On 17 July 2026, pollen conditions in Colwyn Bay will be similar to today, with cypress at low levels, grass at low levels

Is pollen expected to decrease in Colwyn Bay this week?

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

Which pollen types are currently active in Colwyn Bay?

On 16 July 2026, Cypress is the dominant pollen source in Colwyn Bay. grass are also present but at lower levels. willow, alder, artemisia, birch, and hazel are not currently active.

When is pollen season in Colwyn Bay?
Colwyn Bay's pollen year has two main tree culprits: birch first, oak close behind. Grass season overlaps a lot of this too, running May through September and peaking mid-summer. Birch gets going around March and tapers off by May, while oak follows on from April to May. Something to plan around if pollen usually gets to you.
How often is the Colwyn Bay pollen forecast updated?

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

Does pollen in Colwyn Bay 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 Colwyn Bay 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 Colwyn Bay, 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 Colwyn Bay.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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