Pollen today
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Pollen today
Loading today’s values…
Google gave no index for tree, grass or weed pollen here today.
Next four days, highest level each day:
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Google’s index for each plant it models in Seattle today. A plant out of season has no index.
Source: Includes pollen data from GoogleGoogle Maps
The forecast that moves pollen around, and the air beside it.
Forecast: National Weather Service, updated 10:26 am PT.
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Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Google has given no index for Seattle since records began on October 14, 2026.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
Source: Includes pollen data from GoogleIncludes data from Google Maps
What this forecast doesn’t measure, and when to get help.
Google’s index covers tree, grass and weed pollen only, so there is no mold level for Seattle on this page. The National Allergy Bureau publishes pollen and mold counts measured at its stations. Our guides cover common molds such as Alternaria, Cladosporium and Aspergillus.
The forecast doesn’t cover allergens indoors either: dust mites, cockroaches, mice, cats and dogs. Our guides explain each one, starting with dust mites and cats.
An estimated 9.9% of adults in the city of Seattle have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 9.2% to 10.7%). It is a statistical estimate from national survey data, not a count.
53 allergists enrolled in Medicare practice in the Seattle area: 1.27 for every 100,000 people, more than the 1.22 across the US. The count doesn’t show how soon you can get an appointment. See the doctors listed in the Seattle area, or how every state and metro compares.
AllergyNest count from CMS’s Doctors and Clinicians file (October 2026) and Census population estimates for 2025.
The geography, climate and plants behind each season here, with a source for every fact.
Moisture from the Pacific Ocean brings frequent precipitation west of the Cascade Mountains.2 Unlike other locations in the United States, Seattle is rarely exposed to very high temperatures.2 At the airport, winters average about 43 °F, and a typical year has about 266 days between the last spring freeze and the first fall freeze.1
Trees dominate the pollen counted in Seattle.3 A 2019 study of pollen station records found that the cypress family made up 37% of the pollen at Seattle’s station, and that it and alder together made up about two-thirds.3 Red alder grows along the Pacific coast from southeast Alaska to southern California, and it generally flowers from late February to early May, depending on latitude and climate.4 Bigleaf maples and red alders grow in the city’s forested parklands, according to its 2020 Urban Forest Management Plan.5
The Seattle station detected very little pollen after July, and grass made up 2.9% of its pollen and weeds 1.3%.3 One action in the city’s urban forest plan is to explore the impact of trees on allergies and opportunities to reduce tree-produced allergies.5
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in Seattle today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Seattle. A pollen count is the number of pollen grains measured in a cubic meter of air at a counting station. How our pollen index works.
Twice a day. We fetch new values soon after midnight in Seattle, so each day starts with its own values, and again after Google’s daily model run, usually by about 7:30 am PT. Each section shows when its values were retrieved.
Source: Includes pollen data from GoogleIncludes data from Google Maps