About pollen.ie

What we do

Each county page tells you how much pollen to expect today and over the next two days, when it will be worst, and what to change in your day. You can also get the forecast by email the night before.

Where the forecast comes from

We use the European air quality forecast from the Copernicus Atmosphere Monitoring Service (CAMS), through Open-Meteo, together with a weather forecast for each county. It is updated every six hours.

These are forecasts, not measured pollen counts. Real levels on your street can be higher or lower, especially near grass, trees or after rain.

County outlines in our share images are based on OpenStreetMap data, © OpenStreetMap contributors.

The three types of pollen

• Tree pollen runs from February to May. Birch and alder cause the most trouble.
• Grass pollen runs from May to July and affects the most people. June is usually the worst month.
• Weed pollen, such as nettle and mugwort, runs from late June to September.

We rate each type Low, Moderate, High or Very high, based on the number of pollen grains expected in each cubic metre of air.

How weather changes pollen

Warm, dry and breezy days spread the most pollen. Rain washes it out of the air for a while. Levels usually rise through the morning and are highest from late morning to early evening.

Not medical advice

pollen.ie helps you plan, but it is not medical advice. If hay fever or asthma is affecting you, talk to a pharmacist or your GP. You can find allergy help near you.

Get in touch

Spotted something wrong or have an idea? Send us a message.