What is the pollen count in Portland today?

Today's pollen levels in Portland: Tree pollen is None, Grass pollen is Low, Weed pollen is Low. Grass pollen is the dominant type right now, driven by Grass.

What will the pollen count be tomorrow in Portland?

Pollen in Portland is forecast to reach Moderate tomorrow. Weed pollen is the main driver. That's a full-day figure, so early morning usually runs higher than late afternoon. Check again in the morning, because wind and rain can shift it overnight.

What does a Low pollen count mean in Portland?

A Low pollen count means concentrations are minimal. Most people, including those with mild allergies, can spend time outdoors comfortably.

What are the main allergy triggers in Portland right now?

Pollen levels across all types are currently low in Portland. Most allergy sufferers should find conditions manageable today.

What should allergy sufferers do when pollen is Low in Portland?

Pollen levels are low in Portland today, so most outdoor activities should be comfortable. It is still a good idea to check levels daily, since conditions can change quickly with wind and weather shifts.

Does weather affect pollen levels in Portland?

Yes, weather directly affects pollen levels in Portland. Wind spreads pollen farther, rain washes it from the air, and humidity can either trap or disperse particles. Higher humidity today (70%) may help keep some pollen grounded.

Portland, ME Pollen Count Today

Name: Pollen Data for Portland
Creator: MyPollenPal
Keywords: pollen, air quality, allergies, forecast

Live pollen forecast and air quality for Portland, Maine

📍 Portland, METoday · Sep 20

6/10

Breathability™ Score

Good day overall with a few allergy-aware adjustments.

🌳Tree Pollen

None

🌱Grass Pollen

Low

🌿Weed Pollen

Low

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Today's Pollen Levels in Portland

Grass pollen is slightly elevated at Low levels in Portland. Overall conditions are manageable for most people. With a Breathability™ Score of 6, conditions are mixed and may vary through the day.

Breathability™ Score is 6/10
Tree pollen is None, led by Alder and Birch
Grass pollen is Low, led by Grass
Weed pollen is Low, led by Ragweed and Mugwort
Air quality is Good today

How Today's Pollen May Affect You

Mild allergy sufferers

You may notice mild irritation at peak times. Weed pollen is elevated; consider shorter midday exposure and keep water handy.

Moderate allergy sufferers

Plan around peak pollen windows. Try errands early or later, and consider a mask in high-traffic outdoor areas.

Severe allergy sufferers

Use high-protection habits today: shorter trips, cleaner indoor air, and reduced exposure during peak pollen hours.

5-Day Pollen Forecast

Pollen in Portland eases to Low by Thursday.

Today

Sep 20

Overall: Moderate

Tree: None

Grass: Low

Weed: Moderate

Wind: 15 mph (may spread pollen)

Rain: 82% (may wash pollen out)

Humidity: 74%

Mon

Sep 21

Overall: Moderate

Tree: None

Grass: Low

Weed: Moderate

Wind: 13 mph

Rain: 72% (may wash pollen out)

Humidity: 74%

Tue

Sep 22

Overall: Moderate

Tree: None

Grass: Low

Weed: Moderate

Wind: 15 mph (may spread pollen)

Rain: 15%

Humidity: 62%

Wed

Sep 23

Overall: Moderate

Tree: None

Grass: Low

Weed: Moderate

Wind: 18 mph (may spread pollen)

Rain: 26%

Humidity: 70%

Thu

Sep 24

Overall: Low

Tree: None

Grass: Low

Weed: Low

Wind: 33 mph (may spread pollen)

Rain: 88% (may wash pollen out)

Humidity: 84%

Rain is likely Monday (72% chance). The hour or two right after it stops is usually the cleanest air of the day. Plan around Tuesday though. Pollen often climbs the day after rain, when plants use the moisture to release a fresh burst.

Winds could reach 33 mph Thursday. Gusts carry pollen miles from the plant that released it, so a windy day can feel worse than the count suggests.

Tree Pollen in Portland Today

Tree pollen in Portland is None today. Tree pollen season typically runs from early spring through late May, peaking when deciduous trees release their pollen. On low days like today, outdoor activities are generally comfortable for most allergy sufferers.

Species Breakdown

Alder0 grains/m³

Birch0 grains/m³

Hazel0 grains/m³

Oak0 grains/m³

Grass Pollen in Portland Today

Grass pollen in Portland is Low today, reaching 0.22 grains/m³. Grass is currently elevated. People with grass pollen sensitivity may notice nasal congestion and itchy eyes, especially during outdoor activities.

Common Symptoms

Itchy nose and eyes
Sneezing fits
Nasal congestion
Watery eyes
Coughing or wheezing for sensitive people

Species Breakdown

Grass0.22 grains/m³

Weed Pollen in Portland Today

Weed pollen in Portland is Low today, reaching 10.06 grains/m³. Ragweed and Mugwort are the primary driver. Ragweed is the most common allergen in this category, and elevated levels can trigger persistent symptoms even in people who are only mildly sensitive.

Common Symptoms

Persistent sneezing
Runny nose
Itchy eyes and throat
Nasal congestion
Fatigue from prolonged exposure

Species Breakdown

Ragweed10.06 grains/m³

Mugwort0.12 grains/m³

Air Quality in Portland Today

🌬️

Air Quality

Good

Air Pollutant Breakdown

PM2.5Good

5 µg/m³

Tiny particles smaller than 2.5 micrometers that can reach deep into your lungs and bloodstream. High levels can affect breathing and heart health.

PM10Good

7 µg/m³

Larger particles up to 10 micrometers, like dust or pollen. They can irritate your airways and worsen allergies or asthma.

Ozone (O3)Good

53 µg/m³

Elevated levels irritate airways and can worsen asthma symptoms.

Nitrogen Dioxide (NO2)Good

6.5 µg/m³

A respiratory irritant from vehicle exhaust that can trigger inflammation in sensitive airways.

Sulfur Dioxide (SO2)Good

0.7 µg/m³

Even brief exposure can tighten airways, especially for people with asthma.

Carbon Monoxide (CO)Good

160 µg/m³

High levels reduce oxygen delivery in the body, compounding breathing difficulty on high-pollen days.

See the full Portland air quality report →

Weather in Portland Today

🌤️

Weather

56°F

Overcast

Humidity

70%

Wind

7 mph SSW

Feels Like

51°F

Pressure

1022 mb

Frequently Asked Questions

When pollen keeps winning, see an allergist

Pollen shifts week to week in Portland. If cetirizine (Zyrtec) or a steroid nasal spray stopped holding your symptoms down, or they drag on for months at a time, a board-certified allergist can test exactly what you react to and treat the cause instead of the symptom.

See 5 board-certified allergists in Maine →

Get free daily pollen alerts

Morning alerts for Portland when pollen is high. One email a day, only when it matters.

Allergy Guides and Resources

Seasonal pollen guides, daily city rankings, and practical tips for managing your allergies.

Browse all guides →

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