Boston pollen forecast — Fenway-Kenmore neighborhood

On 22 August 2026, overall pollen levels in Boston are moderate. Ambrosia is the main contributor to airborne pollen

On 23 August 2026, pollen conditions in Boston will be different from today, with artemisia at low levels, grass at low levels and ambrosia increasing

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

On 22 August 2026, Ambrosia is the dominant pollen source in Boston. artemisia, cypress, and grass are not currently active.

Near the bank, hazel and willow lead the seasonal calendar, hitting its peak before most trees have even budded, around late winter into March. Oak and birch nearby take over the pollen calendar through mid-spring, cresting around April and May in the year's sharpest tree-pollen spike. Grass pollen becomes the dominant allergen through late spring, peaking in June, before ragweed becomes the more dominant allergen from mid-August into October.

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.