Perth pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Perth is low; acacia, cypress, eucalyptus, and grass 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 decrease.
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Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 13/100 |
| Cypress (Cupressaceae) | Low | 25/100 |
| Eucalyptus (Myrtaceae) | Low | 18/100 |
| Grass (Poaceae) | Low | 3/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 12/100 | |
| Cypress (Cupressaceae) | Low | 24/100 | |
| Eucalyptus (Myrtaceae) | Low | 18/100 | |
| Grass (Poaceae) | Low | 3/100 |
Local Environmental Conditions
Perth sits on the Swan Coastal Plain, where banksia woodland, tuart and jarrah forest and kwongan heathland provide the dominant native vegetation, interspersed with parks and street plantings of both native and introduced trees. Wattle is widespread and flowers heavily through late winter. The sandy coastal soils support quite different vegetation to the clay-based Darling Range foothills further inland.
Perth's pollen season is concentrated between August and November, driven by its Mediterranean climate of mild, wet winters and long, dry summers. Tree pollen, from both native eucalypts and introduced species, typically opens the season in August-September, with grass pollen from the Swan Coastal Plain's pastures, parks and verges peaking through October and November. The dry summer that follows sharply suppresses further pollen activity, giving Perth a shorter, more intense season than subtropical cities further north.
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Resource Hub
Pollen forecast neighborhoods 40 neighborhoods
Sports venues in Perth 10 sports venues
Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Perth right now?
On 20 September 2026, overall pollen levels in Perth are low. Acacia is the main contributor to airborne pollen, while cypress, myrtle, and grass remain at lower levels
Will pollen levels change in Perth tomorrow?
On 21 September 2026, pollen conditions in Perth will be similar to today, with acacia at low levels, cypress at low levels, myrtle at low levels, grass at low levels
Is pollen expected to decrease in Perth this week?
According to the five-day outlook, acacia, cypress, myrtle, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Perth?
On 20 September 2026, Acacia is the dominant pollen source in Perth. cypress, myrtle, and grass are also present but at lower levels.
When is pollen season in Perth?
How often is the Perth pollen forecast updated?
The Perth pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Perth 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 Perth 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 Perth, 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).
