Name: Pollen forecast for Watford (2026-10-17)
Creator: Pollen Count
Published: 2026-10-17T14:18:33Z
License: https://pollencount.org/terms/

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About Pollen in Watford

Watford’s allergy profile sees peak tree pollen activity March-May; Birch and Oak are dominant, originating from Cassiobury Park’s extensive woodlands and Oxhey Park’s mature tree lines; Grass pollen peaks May-July, widely dispersed from Watford Fields, River Colne riverbanks, and residential lawns.

The urban-suburban interface, particularly near Watford Junction, can create pollen traps; River Colne valley topography influences localised pollen distribution; late-season mould spores (Sept-Nov) derive from decaying leaf litter in Whippendell Woods and widespread damp domestic environments.

The pollen count in Watford today is moderate, driven mainly by Cock's-foot.

MED

13 active species

Refreshing live forecast…

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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 Sagebrush Pigweed Fat Hen Ribwort Plantain Russian Thistle Stinging Nettle 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	LOW	4 grains/m³
🌾 Cock's-foot	LOW	4 grains/m³
🌾 Perennial Ryegrass	LOW	4 grains/m³
🌾 Timothy Grass	LOW	4 grains/m³
🌾 Grass (mixed)	LOW	4 grains/m³
+35 more tracked Western Ragweed Pigweed Sagebrush Fat Hen Ribwort Plantain Russian Thistle Stinging Nettle 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	5 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 Sagebrush Stinging Nettle Pigweed Fat Hen Ribwort Plantain 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
🌿 Mugwort	MED	10 grains/m³
🌿 Western Ragweed	MED	7 grains/m³
🌿 Sagebrush	MED	6 grains/m³
🌿 Russian Thistle	MED	5 grains/m³
🌿 Stinging Nettle	MED	5 grains/m³
+35 more tracked Pigweed Fat Hen Ribwort Plantain Common Sorrel Cock's-foot Perennial Ryegrass Timothy Grass Grass (mixed) 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	LOW
Sun 18 Oct	LOW	LOW	LOW
Mon 19 Oct	LOW	MED	MED
Tue 20 Oct	LOW	LOW	MED

Map of Watford (51.61624°, -0.382634°)

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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