Pollen forecast

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

Summary and Weekly Synopsis

High tree pollen at times for most regions. Grass pollen around in low amounts.

This forecast was last updated on 17th April 2014.

Tree Pollen - High

A high tree pollen risk can be expected at times in most regions of the country particularly over the Easter weekend but the risk will be more moderate in the far north. Birch is the most important allergen currently airborne but oak trees are now flowering too. Rainy days will reduce the risk.

Grass Pollen - Low

The early-flowering grasses (meadow foxtail and sweet vernal grass) are now emitting pollen in many regions. The counts will remain generally low but a small minority of sufferers may have some symptoms. The main season will start later in May or early June depending on the weather at that time.

Fungal Spore - Low

Fungal spores will be low during this forecast period.

Weed Pollen - Low

Plantain will emit some pollen but the weed risk will remain generally low.

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 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.