Pollen.city

UK & Ireland Pollen Calendar

United Kingdom & Ireland

Typical pollen seasons for the British Isles. The maritime climate can cause significant year-to-year variation.

JanFebMarAprMayJunJulAugSepOctNovDec
Hazel
Alder
Birch
Oak
Ash
Grass
Mugwort
Intensity:
None
Low
Moderate
High
Very High
Trees Grasses Weeds
Note: Scotland and northern regions typically see seasons start 2-3 weeks later. Grass pollen affects 95% of hay fever sufferers in the UK.

Seasonal Tips

  • February-April: Tree pollen season. Birch is the most common tree allergen in the UK.
  • May-July: Grass pollen peaks. This affects the majority of hay fever sufferers.
  • July-September: Mugwort and other weed pollens become active.
  • Check the Met Office pollen forecast for daily regional predictions.

Learn More