Pollen forecast

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

Summary and Weekly Synopsis

There will be an overall moderate pollen risk from grasses weeds and trees. However showery weather will often cause it to be low for many. The fungal spore risk will continue to be high to very high.

This forecast was last updated on 25th July 2014.

Tree Pollen - Moderate

Sweet chestnut trees are now flowering and there will be a moderate risk in areas where these are located (mainly southern and central UK).


Grass Pollen - Moderate

The grass pollen season is now largely finished but there will still be a risk of a moderate risk on warm dry days especially in northern England and southern Scotland.







Fungal Spore - Very High

We are now in the peak period for fungal spores and the risk will often be high or very high during warm dry weather and during mild humid nights. Alternaria Cladosporium Sporobolomyces Tilletiopsis and Didymella will be the most important allergenic types airborne.






Weed Pollen - High

There will be a continued risk from allergenic weeds over the next week. The main types airborne will be nettle plantain and fat hen (Chenopodium).




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 also available on a daily basis from September to the end of November.

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.