Tacoma pollen forecast - today, tomorrow and the week ahead

Currently, there is no significant pollen in Tacoma.

On 26 June 2026, pollen conditions in Tacoma will be different from today, with grass at low levels

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

On 25 June 2026, there are no significant pollen types in Tacoma.

Tacoma's pollen season opens with alder from January, followed by birch and Douglas fir through March and April. Grass pollen peaks through June and July. The Puget Sound coastal position means onshore winds can periodically disperse pollen, while surrounding Pierce County woodland and the Cascade Mountain foothills contribute substantial tree pollen. Frequent Pacific Northwest rainfall provides regular interruptions to exposure throughout the season.

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

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.

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 Tacoma, 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.