Name: Pollen forecast for Porto (2026-10-16)
Creator: Pollen Count
Published: 2026-10-16T15:25:49Z
License: https://pollencount.org/terms/

The pollen count in Porto today is high, driven mainly by Grass (mixed).

HIGH

14 active species

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4-Day Forecast:

Morning

Grass HIGH

Tree LOW

Weed MED

Afternoon

Grass HIGH

Tree LOW

Weed HIGH

Evening

Grass MED

Tree LOW

Weed MED

Species	Level	Count
🌾 Grass (mixed)	HIGH	23 grains/m³
🌿 Pellitory-of-the-wall	HIGH	20 grains/m³
🌿 Upright Pellitory	HIGH	17 grains/m³
🌾 Bermuda Grass	MED	16 grains/m³
🌾 Cock's-foot	MED	15 grains/m³
+35 more tracked Ribwort Plantain Mugwort Fat Hen Pigweed Russian Thistle Perennial Ryegrass Timothy Grass Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar White Mulberry Olive Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Pellitory-of-the-wall	X.HI	77 grains/m³
🌾 Grass (mixed)	V.HI	76 grains/m³
🌿 Upright Pellitory	X.HI	65 grains/m³
🌿 Ribwort Plantain	X.HI	56 grains/m³
🌾 Bermuda Grass	HIGH	54 grains/m³
+35 more tracked Fat Hen Cock's-foot Mugwort Pigweed Russian Thistle Perennial Ryegrass Timothy Grass Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar White Mulberry Olive Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌾 Grass (mixed)	HIGH	50 grains/m³
🌾 Bermuda Grass	HIGH	35 grains/m³
🌾 Cock's-foot	HIGH	34 grains/m³
🌿 Pellitory-of-the-wall	HIGH	24 grains/m³
🌿 Upright Pellitory	HIGH	21 grains/m³
+35 more tracked Ribwort Plantain Mugwort Fat Hen Pigweed Perennial Ryegrass Timothy Grass Russian Thistle Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar White Mulberry Olive Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌾 Grass (mixed)	HIGH	40 grains/m³
🌾 Bermuda Grass	HIGH	28 grains/m³
🌾 Cock's-foot	HIGH	27 grains/m³
🌿 Pellitory-of-the-wall	HIGH	22 grains/m³
🌿 Upright Pellitory	HIGH	18 grains/m³
+35 more tracked Ribwort Plantain Pigweed Mugwort Fat Hen Perennial Ryegrass Timothy Grass Russian Thistle Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar White Mulberry Olive Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS

Last updated: 15:25 UTC

4-Day Forecast	Tree	Grass	Weed
Fri 16 Oct	LOW	HIGH	HIGH
Sat 17 Oct	LOW	V.HI	X.HI
Sun 18 Oct	LOW	HIGH	HIGH
Mon 19 Oct	LOW	HIGH	HIGH

Map of Porto (41.1579°, -8.6291°)

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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