Name: Pollen forecast for Swindon (2026-05-20)
Creator: Pollen Count
Published: 2026-05-20T14:03:04Z
License: https://pollencount.org/terms/

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About Pollen in Swindon

Swindon’s spring allergy season (March-May) is dominated by Birch and Oak pollen, originating from Lydiard Park, Town Gardens, and urban street trees; late spring through mid-summer (May-July) experiences high Grass pollen counts from Coate Water’s extensive meadows and surrounding rural agricultural land. The town’s urban basin topography can concentrate airborne pollen; autumn (October-November) introduces elevated Mould spore levels, primarily from decaying leaf litter in parks like Queen’s Park and general damp conditions.

HIGH

11 active species

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4-Day Forecast:

Morning

Grass LOW

Tree HIGH

Weed LOW

Afternoon

Grass LOW

Tree HIGH

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 Silver Birch	HIGH	52 grains/m³
🌳 Ash	MED	40 grains/m³
🌳 Downy Birch	MED	34 grains/m³
🌳 Black Poplar	MED	30 grains/m³
🌳 Box Elder	MED	29 grains/m³
+35 more tracked Paper Birch Field Elm English Oak White Oak Holm Oak London Plane 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
🌳 Ash	HIGH	62 grains/m³
🌳 Downy Birch	HIGH	52 grains/m³
🌳 Black Poplar	MED	45 grains/m³
🌳 Box Elder	MED	44 grains/m³
+35 more tracked Paper Birch Field Elm English Oak White Oak Holm Oak London Plane 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	69 grains/m³
🌳 Ash	HIGH	54 grains/m³
🌳 Downy Birch	MED	45 grains/m³
🌳 Black Poplar	MED	39 grains/m³
🌳 Box Elder	MED	38 grains/m³
+35 more tracked Paper Birch Field Elm English Oak White Oak Holm Oak London Plane 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	90 grains/m³
🌳 Ash	HIGH	71 grains/m³
🌳 Downy Birch	HIGH	59 grains/m³
🌳 Black Poplar	HIGH	52 grains/m³
🌳 Box Elder	HIGH	50 grains/m³
+35 more tracked Paper Birch Field Elm English Oak White Oak Holm Oak London Plane 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: 14:03 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 Swindon (51.923939°, -2.096197°)

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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