Pollen Count & Forecast for Winchester

Winchester experiences peak spring pollen from Birch (March-April), prevalent in urban parks like Abbey Gardens and Oram’s Arbour, followed by Oak (April-May) from surrounding South Downs woodlands; summer sees high Grass pollen (May-July) across River Itchen floodplains and water meadows such as Winnall Moors.

The city’s valley topography can trap pollen, exacerbating levels; autumn/winter bring mould spores (September-February) from damp, decaying leaves in woodlands and riverine areas.