Name: Pollen forecast for Bristol (2026-09-01)
Creator: Pollen Count
Published: 2026-09-01T15:30:24Z
License: https://pollencount.org/terms/

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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.

The pollen count in Bristol today is HIGH, driven mainly by Mugwort.

HIGH

15 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed MED

Afternoon

Grass MED

Tree LOW

Weed HIGH

Evening

Grass LOW

Tree LOW

Weed MED

Species	Level	Count
🌿 Mugwort	HIGH	23 grains/m³
🌿 Giant Ragweed	HIGH	18 grains/m³
🌿 Common Ragweed	HIGH	16 grains/m³
🌾 Perennial Ryegrass	MED	8 grains/m³
🌾 Grass (mixed)	MED	8 grains/m³
+35 more tracked Cock's-foot Timothy Grass Stinging Nettle Fat Hen Russian Thistle Pigweed Western Ragweed Ribwort Plantain Common Sorrel Sagebrush Box Elder Alder Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Mugwort	HIGH	21 grains/m³
🌿 Giant Ragweed	HIGH	16 grains/m³
🌿 Common Ragweed	MED	14 grains/m³
🌾 Perennial Ryegrass	MED	7 grains/m³
🌾 Grass (mixed)	MED	7 grains/m³
+35 more tracked Cock's-foot Timothy Grass Russian Thistle Stinging Nettle Pigweed Western Ragweed Fat Hen Ribwort Plantain Common Sorrel Sagebrush Box Elder Alder Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Mugwort	HIGH	28 grains/m³
🌿 Giant Ragweed	HIGH	22 grains/m³
🌿 Common Ragweed	HIGH	18 grains/m³
🌾 Cock's-foot	MED	8 grains/m³
🌾 Perennial Ryegrass	MED	8 grains/m³
+35 more tracked Timothy Grass Grass (mixed) Stinging Nettle Fat Hen Russian Thistle Pigweed Western Ragweed Ribwort Plantain Common Sorrel Sagebrush Box Elder Alder Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Mugwort	HIGH	21 grains/m³
🌿 Giant Ragweed	HIGH	16 grains/m³
🌿 Common Ragweed	MED	14 grains/m³
🌾 Cock's-foot	MED	6 grains/m³
🌾 Perennial Ryegrass	MED	6 grains/m³
+35 more tracked Timothy Grass Grass (mixed) Russian Thistle Stinging Nettle Pigweed Western Ragweed Fat Hen Ribwort Plantain Common Sorrel Sagebrush Box Elder Alder Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS

Last updated: 15:30 UTC

4-Day Forecast	Tree	Grass	Weed
Tue 1 Sep	LOW	MED	HIGH
Wed 2 Sep	LOW	MED	HIGH
Thu 3 Sep	LOW	MED	HIGH
Fri 4 Sep	LOW	MED	HIGH

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