Pollen count in Belfast today

Belfast usually follows the Antrim forecast closely, but some days differ, so it has its own forecast. In 2026 it had 15 High or Very high days, against 16 in the Antrim forecast.

Hay fever symptoms in Belfast are influenced by the county's varied terrain and coastal location. The Glens of Antrim create sheltered valleys where pollen can accumulate, while coastal areas benefit from sea breezes that disperse allergens. 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 urban environment means pollution can exacerbate symptoms, particularly in built-up areas.

Tree pollen season typically starts slightly later in Ulster, running from late February to May. In Belfast, the key local trees are beech, oak, sycamore, which affect spring pollen levels. Grass pollen season peaks in June and July, with the Antrim Coast and Belfast Lough 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.

Belfast and the eastern coast experience drier conditions than western Ulster, with occasional easterly winds bringing pollen from Scotland. Sea breezes along the coast can help disperse pollen, making coastal areas preferable during high pollen days. 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 Belfast by washing particles from the air. During the drier periods common in Belfast, 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.

Belfast offers excellent pharmacy and GP access. The coastal path from Carrickfergus to Larne provides lower-pollen walking options on breezy days. 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. The coastal areas of Belfast typically have lower pollen levels, especially when sea breezes are blowing. Consult your pharmacist or GP about antihistamines and other treatments tailored to your symptoms.