Pollen count in Coleraine today

Coleraine usually gets less pollen than the Derry forecast suggests, because air off the sea carries less pollen. In 2026 it had 7 High or Very high days, against 11 in the Derry forecast.

Hay fever symptoms in Coleraine are influenced by the county's varied terrain and coastal location. The Foyle Valley creates a corridor for pollen movement, while the Sperrin Mountains block much Atlantic weather. Birch pollen is particularly significant in spring. Common symptoms include sneezing, runny or blocked nose, itchy and watery eyes, and an itchy throat. The frequent rainfall can provide some relief, though humid conditions may support mould spores. 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 Coleraine, the key local trees are oak, birch, willow, which affect spring pollen levels. Grass pollen season peaks in June and July, with the Foyle Valley and Sperrin Mountains 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.

Derry city experiences a mix of Atlantic and inland conditions. The coast at Portstewart and Benone offers cleaner air when westerly winds prevail. 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. The regular rainfall in Coleraine often provides natural relief by washing pollen from the air.

Yes, rain generally reduces airborne pollen levels in Coleraine by washing particles from the air. The county's frequent rainfall means you'll often get natural pollen relief, though humidity can increase mould spore levels in areas like Foyle Valley. 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.

Derry city provides good pharmacy access. The beaches at Benone and Downhill are excellent low-pollen destinations during peak grass season. 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 Coleraine 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.