City of Swan pollen forecast — Cullacabardee neighborhood
Pollen Today
Today (20 September) pollen in Cullacabardee, City of Swan is high; acacia is high; cypress is moderate; eucalyptus and grass are low.
Pollen Tomorrow
Tomorrow (21 September 2026) acacia declining, cypress declining, eucalyptus no longer expected, grass no longer expected.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, and grass will increase.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | High | 52/100 |
| Cypress (Cupressaceae) | Moderate | 30/100 |
| Eucalyptus (Myrtaceae) | Low | 5/100 |
| Grass (Poaceae) | Low | 3/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Moderate | 40/100 | |
| Cypress (Cupressaceae) | Low | 18/100 | |
| Eucalyptus (Myrtaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Nearby, close to this spot, the park's turf and planted trees form a small but steady source of grass and plantain and weed pollen. Local wind exposure and land use can shift the exact mix slightly from block to block. Actual counts still shift year to year with temperature, rainfall, and prevailing wind.
In Cullacabardee, temperatures climbing to 13.4°C by September likely mark the start of the main pollen release, with humidity around 77% helping keep counts airborne. Warmer conditions by December (24.5°C, 43% humidity) sustain grass pollen through the season, before rainfall of 18mm in March and cooling toward 12.1°C in June bring the season to a close.
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Frequently Asked Questions About Pollen in Western Australia
Is pollen high in City of Swan right now?
On 20 September 2026, overall pollen levels in City of Swan are high. Acacia is the main contributor to airborne pollen, while cypress, myrtle, and grass remain at lower levels
Will pollen levels change in City of Swan tomorrow?
On 21 September 2026, pollen conditions in City of Swan will be different from today, with acacia, cypress continuing to decline
Is pollen expected to decrease in City of Swan 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 City of Swan?
On 20 September 2026, Acacia is the dominant pollen source in City of Swan. cypress, myrtle, and grass are also present but at lower levels.
When is pollen season in City of Swan?
How often is the City of Swan pollen forecast updated?
The City of Swan pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in City of Swan 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 City of Swan 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 City of Swan, 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).
