Sister Bay pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Sister Bay is low; grass is low. Tomorrow (17 July 2026) levels are similar - grass remains low, ragweed at low levels. Over the following five days ragweed will increase; grass will decrease. 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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Sister Bay's setting on the Door Peninsula shoreline on Green Bay supports northern white cedar, cherry orchards, and lakeside birch as the leading local vegetation, all factoring into the pollen count through the year. Local parks and open ground tend to see higher pollen counts than the denser urban core. Microclimates within the area can shift the timing slightly from one neighborhood to the next.

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):

    Low

    19/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    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 - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    22/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    2/100

Air quality in Sister Bay

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Frequently Asked Questions

Is pollen high in Sister Bay right now?

On 16 July 2026, overall pollen levels in Sister Bay are low. Grass is the main contributor to airborne pollen

Will pollen levels change in Sister Bay tomorrow?

On 17 July 2026, pollen conditions in Sister Bay will be different from today, with ambrosia at low levels, grass at low levels

Is pollen expected to decrease in Sister Bay this week?

According to the five-day outlook, grass pollen levels are expected to gradually decrease, while ambrosia and artemisia pollen will increase, suggesting mixed conditions later in the week.

Which pollen types are currently active in Sister Bay?

On 16 July 2026, Grass is the dominant pollen source in Sister Bay. oak, willow, alder, ambrosia, artemisia, birch, and cypress are not currently active.

When is pollen season in Sister Bay?
Pollen season in Sister Bay starts with maple and elm in March before oak extends the tree season through April. Grass pollen rises through May and June, and ragweed extends the season into September. Warm, humid summers in this part of the Midwest favor a pronounced late-season ragweed peak, shaping conditions across the city.
How often is the Sister Bay pollen forecast updated?

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

Does pollen in Sister Bay 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 Sister Bay 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 Sister Bay, 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:

Rio de Janeiro Copenhagen Athens Denpasar Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Sister Bay.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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