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 13 July 2018.

Summary and Weekly Synopsis

Forecast for 14th to 20th July: Grass pollen risk mainly low. Weed pollen mainly low. Spores moderate.

Tree Pollen - Low

There will continue to be a little lime tree and sweet chestnut tree pollen around but the risk will be generally low.

Grass Pollen - Low

The grass pollen season is almost finished with most regions now at low levels. Just some moderate risk in lowland parts of Scotland for a few days more.   


Fungal Spore - Moderate

Spore levels have recently been affected by the drought conditions and are moderate to low and mainly Cladosporium. The risk is expected to increase again after rain, mainly in western areas. Alternaria spores will rise into the high category at some point in July but are currently at low risk as the air has been too dry for production of much Alternaria so far.

Weed Pollen - Low

Weed pollen will be at low levels with a little nettle mugwort (Artemisia) and fat hen (Chenopodium types) in the air.

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.