Name: Pollen forecast for Lisbon (2026-09-15)
Creator: Pollen Count
Published: 2026-09-15T15:37:28Z
License: https://pollencount.org/terms/

The pollen count in Lisbon today is X.HI, driven mainly by Western Ragweed.

X.HI

17 active species

Refreshing live forecast…

.forecast-refresh-status{display:none!important}.date-tab{cursor:default;opacity:.55}Showing today's cached forecast. Enable JavaScript to switch days and load live data.

4-Day Forecast:

Morning

Grass HIGH

Tree LOW

Weed X.HI

Afternoon

Grass HIGH

Tree LOW

Weed X.HI

Evening

Grass MED

Tree LOW

Weed X.HI

Species	Level	Count
🌿 Western Ragweed	X.HI	108 grains/m³
🌿 Giant Ragweed	X.HI	81 grains/m³
🌾 Grass (mixed)	HIGH	34 grains/m³
🌿 Pellitory-of-the-wall	V.HI	30 grains/m³
🌿 Sagebrush	HIGH	26 grains/m³
+35 more tracked Bermuda Grass Russian Thistle Pigweed Fat Hen Ribwort Plantain Cock's-foot Mugwort Upright Pellitory Timothy Grass Perennial Ryegrass Common Sorrel Stinging Nettle Box Elder Alder Common Ragweed 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
🌿 Western Ragweed	X.HI	77 grains/m³
🌿 Giant Ragweed	X.HI	58 grains/m³
🌾 Grass (mixed)	HIGH	24 grains/m³
🌿 Pellitory-of-the-wall	HIGH	22 grains/m³
🌿 Sagebrush	HIGH	18 grains/m³
+35 more tracked Russian Thistle Bermuda Grass Pigweed Fat Hen Ribwort Plantain Mugwort Cock's-foot Upright Pellitory Timothy Grass Perennial Ryegrass Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed 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
🌿 Western Ragweed	X.HI	109 grains/m³
🌿 Giant Ragweed	X.HI	82 grains/m³
🌿 Pellitory-of-the-wall	V.HI	31 grains/m³
🌿 Sagebrush	HIGH	26 grains/m³
🌿 Russian Thistle	HIGH	24 grains/m³
+35 more tracked Grass (mixed) Pigweed Fat Hen Bermuda Grass Ribwort Plantain Mugwort Upright Pellitory Cock's-foot Timothy Grass Common Sorrel Stinging Nettle Perennial Ryegrass Box Elder Alder Common Ragweed 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
🌿 Western Ragweed	X.HI	137 grains/m³
🌿 Giant Ragweed	X.HI	103 grains/m³
🌿 Pellitory-of-the-wall	V.HI	39 grains/m³
🌿 Sagebrush	V.HI	33 grains/m³
🌿 Russian Thistle	V.HI	30 grains/m³
+35 more tracked Grass (mixed) Pigweed Fat Hen Bermuda Grass Ribwort Plantain Mugwort Upright Pellitory Cock's-foot Timothy Grass Common Sorrel Stinging Nettle Perennial Ryegrass Box Elder Alder Common Ragweed 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: 15:37 UTC

4-Day Forecast	Tree	Grass	Weed
Tue 15 Sep	LOW	HIGH	X.HI
Wed 16 Sep	LOW	HIGH	X.HI
Thu 17 Sep	LOW	MED	X.HI
Fri 18 Sep	LOW	HIGH	X.HI

Map of Lisbon (38.7223°, -9.1393°)

More in Portugal

Faro Porto

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