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About Pollen in Waltham Forest

Waltham Forest experiences peak tree pollen (Birch, Oak, Ash) March-May, originating from Epping Forest’s extensive woodlands and the Lee Valley Regional Park’s varied arboreal zones; grass pollen peaks late May-July, predominantly from Leyton, Hackney, and Walthamstow Marshes’ expansive meadows and River Lea riverbanks.

The Lee Valley’s linear geography can channel and intensify pollen concentrations; urban green spaces (e.g., Lloyd Park, Jubilee Park) create localised hotspots, with dry, windy conditions increasing dispersal; autumn sees elevated outdoor mould spore levels, driven by decomposing leaf litter and damp environments across the borough.

V.HI

11 active species

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4-Day Forecast:

Morning

Grass LOW

Tree X.HI

Weed LOW

Afternoon

Grass LOW

Tree V.HI

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 Silver Birch	V.HI	103 grains/m³
🌳 Downy Birch	HIGH	92 grains/m³
🌳 Paper Birch	HIGH	72 grains/m³
🌳 English Oak	HIGH	61 grains/m³
🌳 Holm Oak	MED	29 grains/m³
+35 more tracked Black Poplar Box Elder London Plane Ash White Oak Field Elm 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	V.HI	136 grains/m³
🌳 Downy Birch	V.HI	122 grains/m³
🌳 Paper Birch	HIGH	96 grains/m³
🌳 English Oak	HIGH	81 grains/m³
🌳 Holm Oak	MED	38 grains/m³
+35 more tracked Black Poplar Box Elder London Plane Ash White Oak Field Elm 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	V.HI	110 grains/m³
🌳 Downy Birch	HIGH	98 grains/m³
🌳 Paper Birch	HIGH	77 grains/m³
🌳 English Oak	HIGH	65 grains/m³
🌳 Holm Oak	MED	31 grains/m³
+35 more tracked Box Elder Black Poplar London Plane Ash White Oak Field Elm 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	88 grains/m³
🌳 Downy Birch	HIGH	78 grains/m³
🌳 Paper Birch	HIGH	62 grains/m³
🌳 English Oak	HIGH	52 grains/m³
🌳 Holm Oak	MED	25 grains/m³
+35 more tracked Box Elder Black Poplar London Plane Ash White Oak Field Elm 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	V.HI	LOW	LOW
Thu 21 May	V.HI	LOW	LOW
Fri 22 May	V.HI	LOW	LOW
Sat 23 May	HIGH	LOW	LOW

Map of Waltham Forest (51.639483°, -0.01351°)

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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