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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 10 November 2017.

Summary and Weekly Synopsis

Moderate spore risk for Aspergillus/penicillium types and basidiospores from mushrooms and toadstools. Pollen low.

Tree Pollen - Low

The tree pollen risk will be low this week. Cedar trees have been flowering over the last few weeks with a lot of pollen produced this year leaving a yellow dust on surfaces nearby. This is not a major allergen in the UK but some people may be affected with hay fever symptoms. Various cedar species flower from mid-September to mid-December.

Grass Pollen - Moderate

The grass pollen season is now finished with only a low risk across all parts of the UK.

Fungal Spore - Moderate

A moderate spore risk for much of the UK this week. Aspergillus/penicillium types and basidiospores (from mushrooms and toadstools) will be the main types airborne.


Weed Pollen - Low

The weed pollen risk is now at very low levels.



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.