We supply and produce the pollen forecast for the UK in conjunction with the Met Office.

Weekly pollen forecast and summary

Forecast for 18th-24th March 2023:  Pollen: High risk for alder and ash. Spores: Aspergillus and Pleospora moderate, low for other types.

Grass Pollen Count - Low

 Pollen forecast for grass with a low green pollen count.

Grass pollen season will start again next April.

Tree Pollen Count - High


Alder pollen will likely see a few more high days before going into decline, in southern and central regions during dry, mild weather.   Ash pollen will reach a high risk occasionally. Elm, will and hazel all airborne but mainly low risk.

Fungal Spore Levels - Moderate


Aspergillus and Pleospora spores will be airborne during dry weather. Other types will be low.

Weed Pollen Count - Low

Pollen forecast for weeds with a low green pollen count.

Weed pollen season will start again next April.

Further Information      

For more information about this service please contact Dr Beverley Adams-Groom on 01905 855411 or via email.

Pollen forecasts are available on a regional basis to cover the whole of the UK including Northern Ireland and the Republic of Ireland. They can also be provided in detail for individual regions.

Daily pollen and spore forecasts are issued from mid-March to early October

Daily pollen forecasts are featured in newspapers, on radio, on television and various web pages.

All the forecasts are based on information from the quality controlled data produced by the National Pollen Monitoring Network, combined with the information from weather forecasts, local vegetation and typography types and information about biological factors and the weather in the preseason period that influences the pollen count.

Science at Worcester

If you are interested in the science behind the pollen forecast, you may be interested in our science degrees.