Secret Harbour pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Secret Harbour is low; acacia, cypress, and eucalyptus are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, and grass will increase.
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Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 10/100 |
| Cypress (Cupressaceae) | Low | 19/100 |
| Eucalyptus (Myrtaceae) | Low | 16/100 |
| Grass (Poaceae) | None | 0/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 8/100 | |
| Cypress (Cupressaceae) | Low | 17/100 | |
| Eucalyptus (Myrtaceae) | Low | 15/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Secret Harbour sits on the coastal plain south of Perth, where banksia woodland on deep sandy soils meets newer suburban development; coastal heath and dune vegetation front the beach, with tuart and marri among the notable remnant eucalypts. Local pollen levels typically peak in spring as grasses flower ahead of the dry Mediterranean summer, following an earlier wattle season through the cooler, wetter winter months.
Secret Harbour, in Perth's southern coastal corridor, follows Western Australia's compressed Mediterranean pollen season, concentrated roughly from August to November before the long dry summer arrives. Coastal dune vegetation, including banksia and casuarina, contributes tree pollen from late winter, while grass pollen from parks, reserves and surrounding pasture peaks through spring. Ocean breezes typically keep pollen counts a little lower here than in suburbs further from the coast, though warm easterly winds off the drier inland can occasionally push levels up.
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Sports venues in Secret Harbour 2 sports venues
Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Secret Harbour right now?
On 20 September 2026, overall pollen levels in Secret Harbour are low. Acacia is the main contributor to airborne pollen, while cypress and myrtle remain at lower levels
Will pollen levels change in Secret Harbour tomorrow?
On 21 September 2026, pollen conditions in Secret Harbour will be similar to today, with acacia at low levels, cypress at low levels, myrtle at low levels
Is pollen expected to decrease in Secret Harbour this week?
According to the five-day outlook, acacia, cypress, myrtle, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Secret Harbour?
On 20 September 2026, Acacia is the dominant pollen source in Secret Harbour. cypress and myrtle are also present but at lower levels. grass are not currently active.
When is pollen season in Secret Harbour?
How often is the Secret Harbour pollen forecast updated?
The Secret Harbour pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Secret Harbour 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 Secret Harbour 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 Secret Harbour, 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. |
Get More in the Airmine Pollen app
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).
