Weekly pollen and fungal spore forecast summary
Forecast to Friday 27th March 2026, for West Midlands forecast region: Pollen: birch pollen low but then rising to moderate or even high; Spores: Aspergillus high when dry.
Grass Pollen Count - Low
Grass pollen risk will be very low.
Tree Pollen Count - Moderate
Recent warm weather is forcing an early start to the birch pollen season. Currently, the risk is low but it is likely to reach moderate, or even high during this forecast period, if the weather continues to be warm and dry. Alder pollen season is now well into decline with a low risk. Ash pollen is airborne too, although a milder allergen for most.
Fungal Spore Levels - High
Aspergillus will be airborne over the next few weeks, on dry days, with a high risk at times. Sufferers of aspergillus often report symptoms at this time of year, particularly during mid-late March. Pleospora will be airborne during mild, dry weather.
Weed Pollen Count - Low
Weed pollen risk will be very low.
School of Science and Environment
If you are interested in our pollen forecast, you may also be interested in our courses.