🌿

About Pollen in Portsmouth

Portsmouth’s March-May spring allergy peak features Birch and Oak pollen from urban green spaces like Victoria Park and Southsea Common; May-July summer sees significant Grass pollen release from coastal meadows including Farlington Marshes and extensive areas of Southsea Common.

The city’s exposed coastal geography, particularly prevailing south-westerly winds across The Solent, influences pollen distribution; however, urban layouts can locally concentrate airborne allergens; autumn-winter brings Mould spore allergies, sourced from damp leaf litter decomposition in parks and shaded coastal areas.

HIGH

12 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 MED

Tree V.HI

Weed LOW

Afternoon

Grass MED

Tree HIGH

Weed MED

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 Holm Oak	HIGH	73 grains/m³
🌳 White Oak	HIGH	70 grains/m³
🌳 English Oak	HIGH	67 grains/m³
🌳 London Plane	HIGH	59 grains/m³
🌳 Paper Birch	MED	13 grains/m³
+35 more tracked Ribwort Plantain Perennial Ryegrass Common Sorrel Cock's-foot Stinging Nettle Pigweed Grass (mixed) Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Silver Birch Downy Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Black Poplar Mesquite Russian Thistle Field Elm All species in the app: Android iOS
🌳 Holm Oak	X.HI	228 grains/m³
🌳 White Oak	X.HI	217 grains/m³
🌳 English Oak	X.HI	208 grains/m³
🌳 London Plane	V.HI	184 grains/m³
🌳 Paper Birch	MED	42 grains/m³
+35 more tracked Perennial Ryegrass Ribwort Plantain Cock's-foot Grass (mixed) Common Sorrel Stinging Nettle Pigweed Fat Hen Timothy Grass Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort 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 Black Poplar Mesquite Russian Thistle Field Elm All species in the app: Android iOS
🌳 Holm Oak	X.HI	251 grains/m³
🌳 White Oak	X.HI	238 grains/m³
🌳 English Oak	X.HI	229 grains/m³
🌳 London Plane	X.HI	203 grains/m³
🌳 Paper Birch	MED	46 grains/m³
+35 more tracked Ribwort Plantain Perennial Ryegrass Common Sorrel Cock's-foot Stinging Nettle Grass (mixed) Pigweed Fat Hen Timothy Grass Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort 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 Black Poplar Mesquite Russian Thistle Field Elm All species in the app: Android iOS
🌳 Holm Oak	X.HI	205 grains/m³
🌳 White Oak	V.HI	195 grains/m³
🌳 English Oak	V.HI	187 grains/m³
🌳 London Plane	V.HI	166 grains/m³
🌳 Paper Birch	MED	38 grains/m³
+35 more tracked Ribwort Plantain Perennial Ryegrass Common Sorrel Stinging Nettle Cock's-foot Pigweed Grass (mixed) Fat Hen Timothy Grass Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort 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 Black Poplar Mesquite Russian Thistle Field Elm All species in the app: Android iOS

Last updated: 14:03 UTC

4-Day Forecast	Tree	Grass	Weed
Wed 20 May	HIGH	MED	MED
Thu 21 May	X.HI	HIGH	HIGH
Fri 22 May	X.HI	HIGH	HIGH
Sat 23 May	X.HI	HIGH	HIGH

Map of Portsmouth (50.846325°, -1.12974°)

More in United Kingdom

Aberdeen Ashford Aylesbury Banbury Barking and Dagenham Barnet

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