Name: Pollen forecast for Bristol (2026-09-15)
Creator: Pollen Count
Published: 2026-09-15T15:37:16Z
License: https://pollencount.org/terms/

🌿

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 V.HI, driven mainly by Giant Ragweed.

V.HI

15 active species

Refreshing live forecast…

.forecast-refresh-status{display:none!important}.date-tab{cursor:default;opacity:.55}Showing today's cached forecast. Enable JavaScript to switch days and load live data.

4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed HIGH

Afternoon

Grass MED

Tree LOW

Weed V.HI

Evening

Grass LOW

Tree LOW

Weed HIGH

Species	Level	Count
🌿 Giant Ragweed	V.HI	32 grains/m³
🌿 Common Ragweed	HIGH	24 grains/m³
🌿 Western Ragweed	MED	14 grains/m³
🌿 Mugwort	MED	14 grains/m³
🌾 Cock's-foot	MED	7 grains/m³
+35 more tracked Perennial Ryegrass Timothy Grass Grass (mixed) Stinging Nettle Pigweed Fat Hen Russian Thistle 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
🌿 Giant Ragweed	HIGH	28 grains/m³
🌿 Common Ragweed	HIGH	21 grains/m³
🌿 Western Ragweed	MED	12 grains/m³
🌿 Mugwort	MED	12 grains/m³
🌾 Cock's-foot	MED	6 grains/m³
+35 more tracked Perennial Ryegrass Timothy Grass Grass (mixed) Stinging Nettle Pigweed Fat Hen Ribwort Plantain Russian Thistle 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
🌿 Giant Ragweed	HIGH	24 grains/m³
🌿 Common Ragweed	HIGH	18 grains/m³
🌿 Western Ragweed	MED	11 grains/m³
🌿 Mugwort	MED	11 grains/m³
🌾 Perennial Ryegrass	MED	7 grains/m³
+35 more tracked Grass (mixed) Cock's-foot Timothy Grass Stinging Nettle Pigweed Fat Hen Ribwort Plantain Russian Thistle 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
🌿 Giant Ragweed	V.HI	33 grains/m³
🌿 Common Ragweed	HIGH	24 grains/m³
🌿 Western Ragweed	MED	14 grains/m³
🌿 Mugwort	MED	14 grains/m³
🌾 Cock's-foot	MED	7 grains/m³
+35 more tracked Perennial Ryegrass Timothy Grass Grass (mixed) Stinging Nettle Pigweed Fat Hen Ribwort Plantain Russian Thistle 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: 15:37 UTC

4-Day Forecast	Tree	Grass	Weed
Tue 15 Sep	LOW	MED	V.HI
Wed 16 Sep	LOW	MED	HIGH
Thu 17 Sep	LOW	MED	HIGH
Fri 18 Sep	LOW	MED	V.HI

Map of Bristol (51.414568°, -2.533841°)

More in United Kingdom

Aberdeen Ashford Aylesbury Banbury Barking and Dagenham Barnet

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