Name: Pollen forecast for Bristol (2026-10-17)
Creator: Pollen Count
Published: 2026-10-17T14:18:13Z
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 moderate, driven mainly by Cock's-foot.

MED

12 active species

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4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed LOW

Afternoon

Grass MED

Tree LOW

Weed LOW

Evening

Grass LOW

Tree LOW

Weed LOW

Species	Level	Count
🌾 Cock's-foot	MED	5 grains/m³
🌾 Perennial Ryegrass	MED	5 grains/m³
🌾 Timothy Grass	MED	5 grains/m³
🌾 Grass (mixed)	MED	5 grains/m³
🌿 Mugwort	LOW	4 grains/m³
+35 more tracked Western Ragweed Pigweed Fat Hen Ribwort Plantain Russian Thistle Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Giant Ragweed Sagebrush 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
🌾 Perennial Ryegrass	MED	7 grains/m³
🌾 Grass (mixed)	MED	7 grains/m³
🌾 Cock's-foot	MED	6 grains/m³
🌾 Timothy Grass	MED	6 grains/m³
🌿 Mugwort	MED	5 grains/m³
+35 more tracked Western Ragweed Stinging Nettle Pigweed Fat Hen Ribwort Plantain Russian Thistle Sagebrush Common Sorrel Box Elder Alder Common Ragweed Giant Ragweed 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	MED	6 grains/m³
🌾 Cock's-foot	MED	5 grains/m³
🌾 Perennial Ryegrass	MED	5 grains/m³
🌾 Timothy Grass	MED	5 grains/m³
🌾 Grass (mixed)	MED	5 grains/m³
+35 more tracked Western Ragweed Fat Hen Russian Thistle Stinging Nettle Pigweed Ribwort Plantain Common Sorrel Sagebrush Box Elder Alder Common Ragweed Giant Ragweed 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	LOW	3 grains/m³
🌿 Western Ragweed	LOW	2 grains/m³
🌿 Fat Hen	LOW	2 grains/m³
🌿 Russian Thistle	LOW	2 grains/m³
🌿 Stinging Nettle	LOW	2 grains/m³
+35 more tracked Pigweed Cock's-foot Perennial Ryegrass Timothy Grass Ribwort Plantain Grass (mixed) Common Sorrel Box Elder Alder Common Ragweed Giant Ragweed Sagebrush 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: 14:18 UTC

4-Day Forecast	Tree	Grass	Weed
Sat 17 Oct	LOW	MED	LOW
Sun 18 Oct	LOW	MED	MED
Mon 19 Oct	LOW	MED	MED
Tue 20 Oct	LOW	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