Oslo pollen forecast — Ekebergsletta neighborhood

On 25 June 2026, overall pollen levels in Oslo are moderate. Grass is the main contributor to airborne pollen, while cypress and birch remain at lower levels

On 26 June 2026, pollen conditions in Oslo will be similar to today, with grass at medium levels, birch at low levels, cypress at medium levels

According to the five-day outlook, grass, birch, and cypress pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

On 25 June 2026, Grass is the dominant pollen source in Oslo. cypress and birch are also present but at lower levels. willow, alder, and hazel are not currently active.

Oslo's pollen season runs from February through August, opening with alder and hazel from February before birch peaks strongly through May. Grass follows through June and July. The Oslofjord setting channels airflows and concentrates pollen, while surrounding Viken woodland and farmland contribute substantial tree and grass pollen. The Atlantic-influenced climate means more frequent rainfall than in more continental Nordic cities, providing regular interruptions throughout the season.

The Oslo 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 Oslo, 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.