São Luís pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in São Luís are low. Cypress is the main contributor to airborne pollen

On 17 July 2026, pollen conditions in São Luís will be similar to today, with cypress at low levels

According to the five-day outlook, cypress pollen levels will increase later in the week.

On 16 July 2026, Cypress is the dominant pollen source in São Luís. amaranthaceae and willow are not currently active.

São Luís' pollen season runs largely year-round in the tropical coastal climate, with grass and tree pollen exposure highest during the drier months from July to December. The intense wet season from January to June brings heavy rainfall that regularly suppresses dispersal, while consistent northeast trade winds disperse pollen across the island city throughout the year.

The São Luís 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 São Luís, 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.