Portlaoise pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Portlaoise is low; grass is low. Tomorrow (17 July 2026) levels are similar - grass remains low, cypress at low levels, mugwort at low levels. Over the following five days cypress, grass, and mugwort 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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Portlaoise's midlands plain setting features oak, ash, and birch as the main tree pollen sources, with exposure varying between residential greenery and the built-up county-town centre. Surrounding Laois farmland extends substantial grass pollen.

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

    19/100

  • 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

    1/100

  • Grass (Poaceae):

    Low

    22/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Low

    1/100

Air quality in Portlaoise

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Frequently Asked Questions

Is pollen high in Portlaoise right now?

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

Will pollen levels change in Portlaoise tomorrow?

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

Is pollen expected to decrease in Portlaoise 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 Portlaoise?

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

When is pollen season in Portlaoise?
Portlaoise sits amid Ireland's fertile midlands farmland in County Laois, giving it a moderate pollen season, with alder and hazel producing a fairly typical spring bloom, while surrounding pastureland sustains Ireland's characteristically long grass pollen season, and mugwort and nettle along field boundaries and waste ground add a gentle late-summer trickle.
How often is the Portlaoise pollen forecast updated?

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

Does pollen in Portlaoise 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 Portlaoise 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 Portlaoise, 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 Ireland?

Cork Dublin Finglas Galway Limerick Lucan Tallaght Trim

Check pollen in other popular cities:

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Data provided by Airmine — Last update: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Portlaoise.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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