Pollen Count & Forecast for Cardiff

Cardiff’s seasonal allergy profile commences spring with dominant birch and oak pollen, originating from extensive urban green spaces including Bute Park and Roath Park; summer transitions to peak grass pollen from River Taff floodplains and peripheral meadows.

The city’s sheltered valley topography, combined with prevailing south-westerly winds from the Bristol Channel, can trap and concentrate airborne allergens, particularly within the urban basin. Late autumn and winter elevate mould spore counts, exacerbated by Cardiff’s often damp climate and the decomposition of organic matter in humid, shaded locales.