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Pollen forecast

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

Summary and Weekly Synopsis


Grass pollen low in south and central, moderate in far North. Weed pollen low to moderate. Fungal spores high at times.

This forecast was last updated on 24th July 2015.

Tree Pollen - Low

The tree pollen risk will be low with just small amounts of sweet chestnut pollen.

Grass Pollen - Moderate

The grass pollen is now in terminal decline and will soon be low everywhere. However, there remains a risk of moderate in the far north of England, Scotland and Northern Ireland any during warm, dry days.



Fungal Spore - High

The spore risk will be high at times this week, particularly those that need humid conditions such as sporobolomyces, tilletiopsis and Didymella. Cladosporium will be high on any warmer, dry days and Alternaria will be low to moderate this week as temperatures are unlikely to high enough for this type.

For more information on fungal spore allergy click here.

Weed Pollen - Moderate


Nettle pollen has now dropped down to low but fat hen (Chenopodium) and mugwort (Artemisia) pollen will be airborne in low or locally moderate amounts, weather permitting. Overall, weed pollen affects approximately 20% of hay fever sufferers.

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.