Gloucester pollen forecast - today, tomorrow and the week ahead

Today (25 June) pollen in Gloucester is medium; grass is medium; cypress is low. Tomorrow (26 June 2026) levels are similar - grass declining. Over the following five days cypress and grass 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

Gloucester's Cape Ann Massachusetts coastal setting features pitch pine, oak, and red cedar as the main tree pollen sources, with exposure varying between the wooded Dogtown Common inland area and the more open rocky coastal commercial and fishing port areas. The Atlantic Ocean proximity creates strong onshore-inland pollen gradients, while the Cape Ann peninsula position means wind direction strongly determines whether marine or inland pollen sources dominate exposure at any given location.

Today - 25 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    7/100

  • Grass (Poaceae):

    Medium

    27/100

  • Willow (Salicaceae):

    None

    0/100

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 - 26 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    15/100

  • Willow (Salicaceae):

    None

    0/100

Frequently Asked Questions

Is pollen high in Gloucester right now?

On 25 June 2026, overall pollen levels in Gloucester are moderate. Grass is the main contributor to airborne pollen, while cypress remain at lower levels

Will pollen levels change in Gloucester tomorrow?

On 26 June 2026, pollen conditions in Gloucester will be different from today, with grass continuing to decline

Is pollen expected to decrease in Gloucester this week?

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

Which pollen types are currently active in Gloucester?

On 25 June 2026, Grass is the dominant pollen source in Gloucester. cypress are also present but at lower levels. hazel and willow are not currently active.

When is pollen season in Gloucester?
Gloucester's Cape Ann Massachusetts coastal setting produces a season opening in late March with oak and maple before birch peaks through May. Grass from surrounding New England land peaks through June and July before mugwort and nettle extend exposure into September. The Atlantic Ocean proximity moderates temperatures and onshore sea breezes can periodically suppress pollen dispersal across this historic fishing port throughout.
How often is the Gloucester pollen forecast updated?

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

Does pollen in Gloucester 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 Gloucester 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 Gloucester, 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.

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Data provided by Airmine — Last update: 25 Jun 2026, 09:02 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for Gloucester.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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

Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.