Skip to content

Pollen forecast

We produce and supply the pollen forecasts for the UK in conjunction with the Met Office. This forecast was last updated on 15 June 2018.

Summary and Weekly Synopsis

Forecast for 16th to 22nd June: High to very high grass pollen risk. Nettle pollen high. Spores high at times.

Tree Pollen - Low

The main tree pollen season is now over. There will be some lime tree pollen in the second half of June.

Grass Pollen - Very High

Very high grass pollen counts will continue this week during warm sunny weather in much of England and Wales but will be more moderate in Scotland. The season is expected to last into the first week of July in Southern and central regions and into mid or late July in the far North of England and Scotland.


Fungal Spore - High

Cladosporium at high levels during warm, dry weather and there are several ascospore and basidiospore types (including Didymella) which are rising to high during very humid conditions particularly during the early hours of the morning triggering symptoms in some sufferers. Alternaria is reaching moderate levels occasionally but not expected to go high until July.


Weed Pollen - High

Nettle pollen is at high risk levels and plantain and dock pollen will continue to be airborne in significant amounts too.

Other information

Oilseed rape (Brassica napus) pollen can cause hay fever in a small number of sufferers but Volatile Organic Compounds (VOCs) given off by the crop can cause irritation of the upper respiratory tract and eyes in some people in close proximity to the crop.

Further Information

Further information on this service can be obtained from Beverley Adams-Groom on 01905 855411.

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

Daily forecasts are issued from the middle of March to the end of September. Tree pollen forecasts are issued in late spring (late March to Mid May). Grass pollen forecasts are issued from late May to August. Weed pollen forecasts are issued from July to the end of May. Fungal spore forecasts are available from the University of Worcester from September to early November. Please contact Beverley on the number above for details.

Daily 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 amount of pollen produced.