São Francisco do Sul pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in São Francisco do Sul is low; cypress is low.
Pollen Tomorrow
Tomorrow (21 September 2026) cypress remains low, willow at low levels.
7-Day Trend
Over the next week cypress and willow will decrease; grass will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | Low | 1/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | Low | 25/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | Low | 13/100 |
Local Environmental Conditions
São Francisco do Sul occupies a historic island on the Santa Catarina northern coast as one of Brazil's oldest colonial settlements and an important port, where native Atlantic Forest remnants, restinga coastal scrub, and mangrove vegetation are the main pollen sources on this bay island. The subtropical climate produces a well-defined pollen season, while the Atlantic Ocean position means onshore breezes can periodically disperse pollen and rainfall interruptions occur throughout the year throughout.
São Francisco do Sul's pollen season follows the region's typical pattern, led by native Atlantic Forest remnants and mangrove vegetation pollen, with exposure varying across the year according to local seasonal rainfall and temperature patterns.
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Frequently Asked Questions About Pollen in Santa Catarina
Is pollen high in São Francisco do Sul right now?
On 20 September 2026, overall pollen levels in São Francisco do Sul are low. Cypress is the main contributor to airborne pollen
Will pollen levels change in São Francisco do Sul tomorrow?
On 21 September 2026, pollen conditions in São Francisco do Sul will be different from today, with cypress at low levels, willow at low levels
Is pollen expected to decrease in São Francisco do Sul this week?
According to the five-day outlook, cypress and willow pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in São Francisco do Sul?
On 20 September 2026, Cypress is the dominant pollen source in São Francisco do Sul. grass and willow are not currently active.
When is pollen season in São Francisco do Sul?
How often is the São Francisco do Sul pollen forecast updated?
The São Francisco do Sul pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in São Francisco do Sul come from nearby or far away?
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.
Are pollen levels in São Francisco do Sul based on measurements or forecasts?
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 Francisco do Sul, 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.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
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Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
