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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 21 May 2018.

Summary and Weekly Synopsis

Tree pollen is in decline. Low to moderate amounts of grass pollen will be airborne. Moderate spore levels.

Tree Pollen - Low

The tree pollen season is in decline and amounts will be generally low. Oak pollen will be the main allergen.

Grass Pollen - Moderate

The early flowering grasses (sweet vernal grass & meadow foxtail) are releasing pollen in moderate amounts and some people will start to get some sniffles and sneezes. The main grass pollen season is expected to go high in early June.

Fungal Spore - Low

A number of different spore types will be at moderate levels including Cladosporium and Tilletiopsis which will be the main types to trigger symptoms.


Weed Pollen - Low

Low amounts of weed pollen will be airborne sufficient to trigger mild symptoms in some sufferers. Dock and plantain will be airborne.



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.