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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 28 April 2017.

Summary and Weekly Synopsis

Oak pollen will be moderate to high, birch low, plane moderate. A little grass pollen now airborne. Spores on the increase, low to moderate.

Tree Pollen - High

The tree pollen risk will be low in the far north of England and Scotland and will be generally moderate elsewhere during good weather but with some locally high risk near the trees. Birch will be mainly low. Oak pollen affects around 20% of hay fever sufferers. Plane pollen is also airborne with a moderate risk in cities.

Grass Pollen - Low

There will be low amounts of grass pollen airborne but this may be sufficient to trigger the odd sneeze or two in some people. The main season is likely to start in mid-May with a moderate risk.

Fungal Spore - Low

As the weather warms up, spore levels will start to increase with a moderate risk possible. Notably Cladosporium as well as basidiospores (e.g. Tilletiopsis). 

For more information on fungal spore allergy click here.

Weed Pollen - Low

Nettle and plantain pollen will be the first weed pollens to get going but they will remain low during this forecast period.

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.