Skip to content

Pollen forecast

We produce and supply the pollen forecasts for the UK in conjunction with the Met Office.

Summary and Weekly Synopsis

A high tree pollen risk reducing to lower levels in cooler changeable weather.

This forecast was last updated on 24th April 2015.

Tree Pollen - High

There will be an initial high risk in some regions but as cooler weather moves in over the weekend the risk will reduce to moderate. Where showers and rain occur the risk will reduce to low. Birch ash oak and plane pollen are the main pollen types currently airborne. Ash pollen is unusually high this spring and although it is a milder allergen will be triggering symptoms in some sufferers. Birch however is having a relatively mild season this year.



Grass Pollen - Low

Some early-flowering grass types are likely to start flowering soon but the risk will remain low during this forecast period.

Fungal Spore - Low

Low spore concentrations are expected over this forecast period.

For more information on fungal spore allergy click here.

Weed Pollen - Low

The weed pollen counts will remain low until later 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.

For more information on the role of fungal spores in allergy, click here.

For more information on the role of pollen in allergy please see the following pages:

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 also available on a daily basis from September to the end of November.

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.