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Pollen forecast

We produce and supply the pollen forecasts for the UK in conjunction with the Met Office. This forecast was last updated on 14 September 2018.

Summary and Weekly Synopsis

Forecast for 15 – 21 September. Fungal spores moderate to high. Pollen low.

Tree Pollen - Low

The tree pollen risk is currently very low for most types. However, for those affected by cedar (Cedrus) trees, this pollen type will be increasing to a locally high risk. Only a small minority of people in the UK are affected by this type.

Grass Pollen - Low

The grass pollen season is finished with all regions now at very low levels.


Fungal Spore - High

Fungal spores will be at moderate levels in Scotland, the far north of England and Northern Ireland and high elsewhere. Cladosporium and Alternaria remain in the air but the seasons are now in decline. Other types of note include Epicoccum, Basidiospores (from mushrooms and toadstools), Aspergillus and Penicillium.



Weed Pollen - Low

The weed pollen risk will be low, with small amounts of nettle family (Urticaceae) pollen 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.