Boston pollen forecast — Freedom Trail neighborhood

On 1 August 2026, overall pollen levels in Boston are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels

On 2 August 2026, pollen conditions in Boston will be similar to today, with grass at low levels, ambrosia at medium levels, artemisia at low levels

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

On 1 August 2026, Ambrosia is the dominant pollen source in Boston. grass and artemisia are also present but at lower levels. cypress are not currently active.

Situated a landmark in Boston, Freedom Trail shares the area's pollen timeline, beginning with maple and elm in March with birch and oak taking the lead through April and May. Grass pollen rises through June and July, and a modest weed pollen tail continues into September. The New England climate compresses tree, grass, and weed pollen into a shorter but intense season throughout the year.

The Boston 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 Boston, 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.