Roleystone pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Roleystone is moderate; cypress is moderate; acacia, eucalyptus, and grass are low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains low, acacia increasing, cypress increasing, eucalyptus increasing.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, and grass will decrease.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 22/100 |
| Cypress (Cupressaceae) | Moderate | 46/100 |
| Eucalyptus (Myrtaceae) | Low | 24/100 |
| Grass (Poaceae) | Low | 8/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Moderate | 30/100 | |
| Cypress (Cupressaceae) | High | 53/100 | |
| Eucalyptus (Myrtaceae) | Moderate | 33/100 | |
| Grass (Poaceae) | Low | 18/100 |
Local Environmental Conditions
Located within the neighborhood's edge, this area has the riverbank shelters river oak, whose pollen spreads readily on the wind from spring onward. A stand of eucalypt with wattle through the understorey, wattle ranked among the region's sharpest allergens; this sits close by. Nearby, a short distance from here, green space with maintained lawn and planted plane trees, both contributing to seasonal pollen counts.
The water-adjacent river oak is an early riser, topping out well before most other trees start releasing pollen, around July and August. Eucalypt and wattle nearby take over the pollen calendar through late winter, topping out in the August-to-September stretch. Grass pollen rises through spring toward a November high point, before staying elevated through the summer months into late January.
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Resource Hub
Pollen forecast neighborhoods 2 neighborhoods
Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Roleystone right now?
On 20 September 2026, overall pollen levels in Roleystone are moderate. Cypress is the main contributor to airborne pollen, while acacia, myrtle, and grass remain at lower levels
Will pollen levels change in Roleystone tomorrow?
On 21 September 2026, pollen conditions in Roleystone will be different from today, with grass at low levels and acacia, cypress, myrtle increasing
Is pollen expected to decrease in Roleystone 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 Roleystone?
On 20 September 2026, Cypress is the dominant pollen source in Roleystone. acacia, myrtle, and grass are also present but at lower levels.
When is pollen season in Roleystone?
How often is the Roleystone pollen forecast updated?
The Roleystone pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Roleystone 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 Roleystone 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 Roleystone, 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).
