Bar Harbor pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Bar Harbor is medium; grass is medium; ragweed is low. Tomorrow (17 July 2026) levels are similar. Over the following five days grass and ragweed will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

For long term forecasts and maps, see the Airmine app

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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

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Set on the granite coast of Mount Desert Island, Bar Harbor's landscape is defined by red spruce and balsam fir alongside coastal blueberry barrens and pitch pine on the ledges, the main contributors to seasonal pollen exposure. Wind patterns across the area help determine how far pollen travels from these source plants. As with most of the region, counts tend to build gradually rather than spike overnight.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Medium

    36/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    22/100

High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.

Tomorrow - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    None

    0/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Air quality in Bar Harbor

View air quality

Pollen forecast for neighborhoods and landmarks in Bar Harbor

Acadia Carriage Roads Acadia National Park Cadillac Mountain

Frequently Asked Questions

Is pollen high in Bar Harbor right now?

On 16 July 2026, overall pollen levels in Bar Harbor are moderate. Grass is the main contributor to airborne pollen, while ambrosia remain at lower levels

Will pollen levels change in Bar Harbor tomorrow?

On 17 July 2026, pollen conditions in Bar Harbor will be similar to today with no significant pollen expected.

Is pollen expected to decrease in Bar Harbor this week?

According to the five-day outlook, ambrosia and grass pollen levels will increase later in the week.

Which pollen types are currently active in Bar Harbor?

On 16 July 2026, Grass is the dominant pollen source in Bar Harbor. ambrosia are also present but at lower levels. willow, alder, artemisia, birch, cypress, and oak are not currently active.

When is pollen season in Bar Harbor?
Bar Harbor's pollen season opens with maple and elm from March with birch and oak joining in and continuing through April and May. Grass pollen then peaks through June and July, and mugwort and nettle extend exposure into September. A relatively short growing season compresses tree, grass, and weed pollen into a more intense stretch.
How often is the Bar Harbor pollen forecast updated?

The Bar Harbor pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in Bar Harbor come from nearby or far away?

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Are pollen levels in Bar Harbor based on measurements or forecasts?

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Bar Harbor, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.

Want to see pollen forecasts for other cities in United States?

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Check pollen in other popular cities:

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Data provided by Airmine — Last update: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Bar Harbor.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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