Sigtuna pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in Sigtuna are high. Cypress is the main contributor to airborne pollen, while grass and artemisia remain at lower levels

On 17 July 2026, pollen conditions in Sigtuna will be different from today, with cypress, grass continuing to decline

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, Cypress is the dominant pollen source in Sigtuna. grass and artemisia are also present but at lower levels. alder, birch, hazel, and willow are not currently active.

Sigtuna's pollen season runs from February through August, opening with alder from February before birch peaks strongly through May. Grass pollen then dominates for several weeks in June and July before gradually easing. Sigtuna's location relative to Lake Mälaren's northern shore means daily pollen readings can swing with changes in wind direction. Surrounding birch-dominated woodland and farmland extend the tail of the season into August.

The Sigtuna 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 Sigtuna, 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.