Name: Pollen forecast for Swansea (2026-10-17)
Creator: Pollen Count
Published: 2026-10-17T14:18:31Z
License: https://pollencount.org/terms/

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About Pollen in Swansea

Swansea’s spring allergy profile is dominated by tree pollen: Hazel and Alder from late winter; Birch and Oak peak late spring, originating from Singleton Park, Clyne Gardens, and urban street trees. Mid-spring to mid-summer sees high Grass pollen counts, prevalent from Swansea Bay’s expansive foreshore, Tawe/Clyne riverbanks, and surrounding local meadows.

Swansea’s coastal-valley topography significantly influences pollen levels; prevailing westerly winds can disperse or concentrate airborne allergens, notably in sheltered areas like the Clyne Valley. Autumn brings increased Mould spore counts, exacerbated by high local humidity, decaying vegetation in woodland areas like Kilvey Hill, and damp urban environments.

The pollen count in Swansea today is moderate, driven mainly by Mugwort.

MED

13 active species

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed MED

Afternoon

Grass MED

Tree LOW

Weed MED

Evening

Grass LOW

Tree LOW

Weed LOW

Species	Level	Count
🌿 Mugwort	MED	6 grains/m³
🌾 Cock's-foot	MED	6 grains/m³
🌾 Timothy Grass	MED	6 grains/m³
🌾 Grass (mixed)	MED	6 grains/m³
🌾 Perennial Ryegrass	MED	5 grains/m³
+35 more tracked Western Ragweed Stinging Nettle Pigweed Fat Hen Ribwort Plantain Sagebrush Common Sorrel Russian Thistle 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
🌾 Grass (mixed)	MED	6 grains/m³
🌿 Mugwort	MED	5 grains/m³
🌾 Cock's-foot	MED	5 grains/m³
🌾 Perennial Ryegrass	MED	5 grains/m³
🌾 Timothy Grass	MED	5 grains/m³
+35 more tracked Western Ragweed Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Russian Thistle 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	MED	7 grains/m³
🌾 Grass (mixed)	MED	6 grains/m³
🌾 Cock's-foot	MED	5 grains/m³
🌾 Perennial Ryegrass	MED	5 grains/m³
🌾 Timothy Grass	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	7 grains/m³
🌾 Grass (mixed)	MED	7 grains/m³
🌾 Cock's-foot	MED	6 grains/m³
🌾 Timothy Grass	MED	6 grains/m³
🌿 Western Ragweed	MED	5 grains/m³
+35 more tracked Perennial Ryegrass Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Russian Thistle 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

Last updated: 14:18 UTC

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

Map of Swansea (51.622099°, -3.876958°)

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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