Sammamish pollen forecast - today, tomorrow and the week ahead

Currently, there is no significant pollen in Sammamish.

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

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

On 16 July 2026, there are no significant pollen types in Sammamish.

Sammamish'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, making Sammamish one of the more interrupted pollen seasons in the US throughout.

The Sammamish 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 Sammamish, 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.