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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 9 March 2018.

Summary and Weekly Synopsis

Moderate tree pollen for alder. Still some hazel around in low amounts.

Tree Pollen - Moderate

Alder tree pollen is now in peak season with a moderate (and locally high) risk on dry days in the south and central parts of the country. Hazel pollen remains airborne in low amounts. Elm and willow pollen are also starting but these are much less of a problem only affecting a small minority of people.



Grass Pollen - Low

The grass pollen season will start again in the Spring.

Fungal Spore - Low

The spore risk will be generally low this week.


Weed Pollen - Low

The weed pollen season will start again in the Spring.



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.