Bellevue pollen forecast - today, tomorrow and the week ahead

Today (25 June) pollen in Bellevue is low; grass is low. Tomorrow (26 June 2026) levels are similar - grass increasing, cypress at low levels. 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

Bellevue's Puget Sound suburban Washington setting features Douglas fir, bigleaf maple, and red alder as the main tree pollen sources, with exposure varying between the extensively forested Cougar Mountain and Bellevue Hill residential areas and the more built-up downtown commercial corridors. The Mercer Slough corridor is a locally significant wetland pollen source, while the forested hillside setting means Douglas fir contributes substantially more local tree pollen than in lower-elevation Puget Sound cities.

Today - 25 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    1/100

  • 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):

    Low

    2/100

  • Grass (Poaceae):

    Medium

    26/100

  • Willow (Salicaceae):

    None

    0/100

Pollen forecast for neighborhoods and landmarks in Bellevue

Bellevue West HS's Football Field

Frequently Asked Questions

Is pollen high in Bellevue right now?

On 25 June 2026, overall pollen levels in Bellevue are low. Grass is the main contributor to airborne pollen

Will pollen levels change in Bellevue tomorrow?

On 26 June 2026, pollen conditions in Bellevue will be different from today, with cypress at low levels and grass increasing

Is pollen expected to decrease in Bellevue 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 Bellevue?

On 25 June 2026, Grass is the dominant pollen source in Bellevue. hazel, cypress, and willow are not currently active.

When is pollen season in Bellevue?
Bellevue's Puget Sound suburban setting in Washington produces a season opening in January with alder before birch peaks through March and April. Grass from surrounding Pacific Northwest land peaks through June and July before mugwort and nettle extend exposure into September. The wet Pacific oceanic climate provides very frequent rainfall interruptions throughout, making Bellevue one of the more interrupted pollen seasons in the US.
How often is the Bellevue pollen forecast updated?

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

Does pollen in Bellevue 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 Bellevue 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 Bellevue, 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: 25 Jun 2026, 09:02 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for Bellevue.

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.