Roskilde pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in Roskilde are moderate. Grass is the main contributor to airborne pollen, while cypress remain at lower levels

On 17 July 2026, pollen conditions in Roskilde will be different from today, with artemisia at low levels, cypress at low levels and grass increasing

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

On 16 July 2026, Grass is the dominant pollen source in Roskilde. cypress are also present but at lower levels. alder, artemisia, birch, hazel, and willow are not currently active.

Roskilde's pollen season opens with hazel and alder from January, birch dominates strongly through April and May given the town's many mature cathedral-quarter trees, and grass takes over June and July. At the southern, sheltered end of Roskilde Fjord, the town gets less consistent wind assistance than towns positioned closer to the open Kattegat.

The Roskilde 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 Roskilde, 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.