Pollen count in Portlaoise today

Portlaoise usually gets more pollen than the Laois forecast suggests. In 2026 it had 38 High or Very high days, against 23 in the Laois forecast.

Hay fever symptoms in Portlaoise are influenced by the county's varied terrain and inland position. The Slieve Bloom Mountains support extensive conifer plantations with pine pollen in spring. The surrounding lowlands are intensively farmed with high grass pollen. Common symptoms include sneezing, runny or blocked nose, itchy and watery eyes, and an itchy throat. During prolonged dry spells, symptoms may be more persistent. The rural setting means exposure to agricultural pollen sources is common during farming activities.

Tree pollen season typically runs from February to May. In Portlaoise, the key local trees are oak, beech, Scots pine, which affect spring pollen levels. Grass pollen season peaks in June and July, with the Slieve Bloom Mountains and bogland contributing to local concentrations. Weed pollen, including nettle and dock, can be present from June to September. Our daily forecasts help you track these changing conditions throughout the seasons.

Laois's central location means variable weather with no coastal influence. The Slieve Blooms can trap weather systems, creating localised conditions. Without coastal influence, pollen can concentrate during calm, dry periods. Warm, dry, and windy days typically see higher pollen counts as conditions favour pollen release and dispersal. During dry spells, pollen levels can build up over several days.

Yes, rain generally reduces airborne pollen levels in Portlaoise by washing particles from the air. During the drier periods common in Portlaoise, rain showers provide welcome relief. However, thunderstorms can break pollen grains into smaller particles that penetrate deeper into the lungs. Light, steady rain is best for pollen relief. Check our daily forecast to plan activities around weather patterns.

The higher Slieve Bloom trails often have cleaner air than the lowland farms. Portlaoise offers good pharmacy access for the region. General tips include checking our daily pollen forecast before planning outdoor activities, staying indoors during peak pollen times (usually mid-morning and early evening), wearing wraparound sunglasses outdoors, and showering after being outside. Consider heading to higher ground or nearby coastal areas on high pollen days. Consult your pharmacist or GP about antihistamines and other treatments tailored to your symptoms.