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About Pollen in Bristol

Bristol’s allergy profile sees early spring (March-April) dominated by tree pollen: Birch and Hazel from Leigh Woods and Clifton Downs; Oak pollen follows into May across Ashton Court Estate and Blaise Castle. Summer (May-July) brings widespread Grass pollen from urban green spaces like Brandon Hill, Victoria Park, and River Avon meadows.

The city’s valley topography, particularly around the Avon Gorge, traps pollen, exacerbating symptoms in central areas; autumn (Sept-Nov) introduces mould spores, primarily from decomposing leaf litter and damp conditions prevalent in shaded parks and garden environments.

HIGH

11 active species

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4-Day Forecast:

Morning

Grass LOW

Tree V.HI

Weed LOW

Afternoon

Grass LOW

Tree HIGH

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 Silver Birch	HIGH	94 grains/m³
🌳 Downy Birch	HIGH	91 grains/m³
🌳 Paper Birch	HIGH	72 grains/m³
🌳 English Oak	HIGH	60 grains/m³
🌳 White Oak	MED	40 grains/m³
+35 more tracked Holm Oak Black Poplar Box Elder London Plane Ash Field Elm Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	HIGH	92 grains/m³
🌳 Downy Birch	HIGH	90 grains/m³
🌳 Paper Birch	HIGH	71 grains/m³
🌳 English Oak	HIGH	59 grains/m³
🌳 White Oak	MED	40 grains/m³
+35 more tracked Holm Oak Box Elder London Plane Black Poplar Ash Field Elm Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	HIGH	99 grains/m³
🌳 Downy Birch	HIGH	96 grains/m³
🌳 Paper Birch	HIGH	76 grains/m³
🌳 English Oak	HIGH	64 grains/m³
🌳 White Oak	MED	42 grains/m³
+35 more tracked Holm Oak Box Elder London Plane Black Poplar Ash Field Elm Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	HIGH	79 grains/m³
🌳 Downy Birch	HIGH	76 grains/m³
🌳 Paper Birch	HIGH	61 grains/m³
🌳 English Oak	HIGH	50 grains/m³
🌳 White Oak	MED	34 grains/m³
+35 more tracked Holm Oak Box Elder London Plane Black Poplar Ash Field Elm Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS

Last updated: 14:02 UTC

4-Day Forecast	Tree	Grass	Weed
Wed 20 May	HIGH	LOW	LOW
Thu 21 May	HIGH	LOW	LOW
Fri 22 May	HIGH	LOW	LOW
Sat 23 May	HIGH	LOW	LOW

Map of Bristol (51.414568°, -2.533841°)

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What Pollen Levels Mean

LOW Symptoms are unlikely

MED Moderate risk of symptoms

HIGH Widespread symptoms likely

V.HI Expect significant symptoms

X.HI Extremely high symptom likelihood & severity