Ilhéus pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (11 September) pollen in Ilhéus is low; cypress, grass, and willow are low.
Pollen Tomorrow
Tomorrow (12 September 2026) grass remains low, willow remains low, cypress increasing.
7-Day Trend
Over the next week cypress, grass, and willow will decrease.
Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset. Airmine's estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily. Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS) team.
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Air Quality
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Pollen Risk
Today - 11 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | Low | 2/100 |
| Grass (Poaceae) | Low | 1/100 |
| Willow (Salicaceae) | Low | 1/100 |
Tomorrow - 12 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) | Moderate | 42/100 | |
| Grass (Poaceae) | Low | 3/100 | |
| Willow (Salicaceae) | Low | 23/100 |
Local Environmental Conditions
Ilhéus lines the Bahia southern Atlantic coast as the capital of Brazil's cacao country, where native Atlantic Forest remnants, cacao plantation trees, and restinga coastal scrub are the main pollen sources. The tropical climate supports year-round pollen production, while the very wet coastal Atlantic Forest climate provides very frequent rainfall interruptions and the cacao plantation contributes a distinctive and commercially important local pollen source throughout.
Ilhéus's pollen season follows the region's typical pattern, led by cacao plantation trees and restinga coastal scrub 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 Bahia
Is pollen high in Ilhéus right now?
On 11 September 2026, overall pollen levels in Ilhéus are low. Cypress is the main contributor to airborne pollen, while grass and willow remain at lower levels
Will pollen levels change in Ilhéus tomorrow?
On 12 September 2026, pollen conditions in Ilhéus will be different from today, with grass at low levels, willow at low levels and cypress increasing
Is pollen expected to decrease in Ilhéus this week?
According to the five-day outlook, cypress, grass, and willow pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Ilhéus?
On 11 September 2026, Cypress is the dominant pollen source in Ilhéus. grass and willow are also present but at lower levels.
When is pollen season in Ilhéus?
How often is the Ilhéus pollen forecast updated?
The Ilhéus pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Ilhéus 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 Ilhéus 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 Ilhéus, 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 exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen 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).
