Name: Pollen forecast for Windsor (2026-10-17)
Creator: Pollen Count
Published: 2026-10-17T14:18:34Z
License: https://pollencount.org/terms/

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About Pollen in Windsor

Windsor’s spring allergy profile peaks March-May with high tree pollen; Birch, Oak, and Hornbeam dominate from Windsor Great Park and Home Park’s mature woodlands. Summer transitions to significant grass pollen (May-July), originating from the extensive riverside meadows and Thames embankments.

The Thames Valley’s sheltered topography and enclosed green spaces, like Alexandra Gardens, can concentrate pollen, intensifying local airborne allergen exposure. Autumn (September-November) brings elevated mould spore counts, driven by decomposing leaf litter within forested areas and persistent riverside humidity.

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

MED

13 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed LOW

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
🌾 Perennial Ryegrass	MED	6 grains/m³
🌾 Timothy Grass	MED	6 grains/m³
🌾 Grass (mixed)	MED	6 grains/m³
+35 more tracked Western Ragweed Sagebrush Fat Hen Russian Thistle Stinging Nettle Pigweed Ribwort Plantain 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 Stinging Nettle Pigweed Sagebrush 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	HIGH	16 grains/m³
🌿 Western Ragweed	MED	10 grains/m³
🌿 Stinging Nettle	MED	8 grains/m³
🌿 Sagebrush	MED	7 grains/m³
🌿 Fat Hen	MED	7 grains/m³
+35 more tracked Cock's-foot Perennial Ryegrass Timothy Grass Grass (mixed) Russian Thistle Pigweed Ribwort Plantain 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	11 grains/m³
🌿 Western Ragweed	MED	7 grains/m³
🌿 Sagebrush	MED	5 grains/m³
🌿 Fat Hen	MED	5 grains/m³
🌿 Russian Thistle	MED	5 grains/m³
+35 more tracked Stinging Nettle Pigweed 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	MED
Sun 18 Oct	LOW	MED	MED
Mon 19 Oct	LOW	MED	HIGH
Tue 20 Oct	LOW	LOW	MED

Map of Windsor (51.47729°, -0.63118°)

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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