Locarno pollen forecast — Verzasca Valley neighborhood

On 16 July 2026, overall pollen levels in Locarno are moderate. Cypress is the main contributor to airborne pollen, while grass, willow, and hazel remain at lower levels

On 17 July 2026, pollen conditions in Locarno will be different from today, with grass at medium levels, willow at low levels, hazel at low levels and cypress continuing to decline

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

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

Verzasca Valley's pollen timeline opens with hazel and alder in January, birch surges through April and May, chestnut and oak keep the tree season going, and grass takes over across June and July. This stretch south of the Alps tends to hold onto pollen during still, sun-warmed spells, while nearby chestnut forest and lakeside greenery keep contributing. The warm, sheltered southern Alpine microclimate means the season here starts earlier than in northern Swiss cities.

The Locarno 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 Locarno, 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.