Pollen levels are never uniform across the UK. Season timing, dominant pollen type and intensity all shift with climate, vegetation and how built-up an area is. This hub explains the regional patterns behind the UK pollen map and links through to detailed local hay fever guides. For a live daily count, check the official Met Office pollen forecast; the guidance here is general information rather than medical advice.
How UK pollen patterns vary, and what the risk levels mean
Three broad rules shape the UK pollen map. First, the season runs earliest in the warm South East and later the further north and west you travel, with Scotland often three to four weeks behind London. Second, cities experience an urban heat island effect that brings tree pollen forward, while rural and agricultural areas carry heavier grass pollen loads. Third, weather matters day to day: dry, breezy conditions lift counts, while rain temporarily washes pollen from the air.
Most UK forecasts then rate the risk on a four-band scale. Low means most people will not notice symptoms outdoors. Moderate means sensitive individuals may get mild symptoms, so consider antihistamines before going out. High means most sufferers will react, so keep windows closed and filter indoor air. Very high means severe symptoms are likely, so minimise outdoor time, particularly late morning to late afternoon when counts peak. Air pollution can worsen matters: nitrogen dioxide from traffic can fragment pollen into smaller particles that penetrate deeper into the airways.
London and the South East
London and the South East see the earliest and longest pollen season in the UK. The urban heat island effect brings tree pollen forward to late February, and the London plane tree is a major local trigger, followed by a heavy grass pollen peak in May and June. For local timing and tips, see our guides to hay fever in London and hay fever in the South East.
The Midlands and Birmingham
Around the Midlands, surrounding farmland means grass pollen dominates, with a strong June peak. Urban Birmingham warms slightly faster than the countryside around it, nudging the tree pollen season a little earlier. Read more in our guide to hay fever in Birmingham.
Northern England and Manchester
Northern England typically runs one to two weeks behind London, and nearby moorland adds weed pollen later in the season. Manchester's mild, often damp climate can suppress counts on wet days but does not shorten the grass pollen peak. See our guides to hay fever in Manchester and hay fever in Northern England.
Scotland
Scotland has the most delayed season, often starting in April and peaking across June and July. The grass pollen season is shorter but can be intense during its peak weeks, while tree pollen loads are generally lower than in the south. Full detail is in our guide to hay fever in Scotland.
Wales, Cardiff and the South West
Wales sees high birch and oak tree pollen, with Atlantic rain able to suppress counts temporarily before they rebound. Cardiff shares this pattern with an added urban warming effect. The mild South West, including Bristol, has a long season stretching from early March into July, with heavy grass pollen in rural areas. See our guides to hay fever in Cardiff and hay fever in Bristol.
East Anglia and the East of England
East Anglia is one of the UK's most agricultural regions, so grass and arable pollen dominate through the June and July peak. Its relatively dry, continental climate can keep counts elevated for longer stretches than the wetter west. Read our guide to hay fever in East Anglia.
Keeping indoor air clean on high-pollen days
Wherever you are on the map, the same principle helps once counts climb: reduce the pollen you bring in and filter the air already indoors. On High or Very High days, keep windows closed during peak hours and run a capable purifier in the rooms you use most. The Luggable XL 7-Fan uses MERV-13 filtration (around 93% capture efficiency) and delivers about 681 cubic metres of clean air per hour, running at under 35 decibels and costing roughly two pounds a year to run, with an Energy Star Most Efficient 2026 rating. Filtration complements, rather than replaces, standard hay fever measures.
