UK & Ireland Pollen Calendar
United Kingdom & Ireland
Typical pollen seasons for the British Isles. The maritime climate can cause significant year-to-year variation.
| Species | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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.