Dennis pollen forecast - today, tomorrow and the week ahead

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

On 31 August 2026, pollen conditions in Dennis will be different from today, with ambrosia at high levels, grass at moderate levels and artemisia continuing to decline

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

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

For Dennis, water-edge hazel and willow are usually the first allergenic trees active here, climbing steadily from late winter into March. Woodland oak and birch pick up the pace next, through mid-to-late spring, building to its sharpest point across April and May. Grass pollen becomes the dominant allergen through late spring, peaking in June, then yields to ragweed, the dominant late-summer and fall allergen through October.

The Dennis 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 Dennis, 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.