Wellesley pollen forecast — Wellesley Lower Falls neighborhood

On 30 August 2026, overall pollen levels in Wellesley are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels

On 31 August 2026, pollen conditions in Wellesley will be similar to today, with ambrosia at high levels, artemisia at low levels, grass at moderate levels

According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, while ambrosia and grass pollen will increase, suggesting mixed conditions later in the week.

On 30 August 2026, Ambrosia is the dominant pollen source in Wellesley. grass and artemisia are also present but at lower levels. cypress are not currently active.

Hazel and willow near the water open the pollen calendar early, topping out well before most other trees start releasing pollen, around February and March. Oak and birch nearby take over the pollen calendar through mid-spring, building to its sharpest point across April and May. By late spring, grass pollen is climbing steadily toward a June high point, then yields to ragweed, the dominant late-summer and fall allergen through October.

The Wellesley 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 Wellesley, 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.