Lyalls Mill pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Lyalls Mill is high; cypress and eucalyptus are high; acacia is moderate; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains low, acacia declining, cypress declining, eucalyptus declining.
7-Day Trend
Over the next week acacia, eucalyptus, and grass will increase; cypress will decrease.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Moderate | 29/100 |
| Cypress (Cupressaceae) | High | 52/100 |
| Eucalyptus (Myrtaceae) | High | 65/100 |
| Grass (Poaceae) | Low | 17/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 14/100 | |
| Cypress (Cupressaceae) | Moderate | 36/100 | |
| Eucalyptus (Myrtaceae) | Moderate | 50/100 | |
| Grass (Poaceae) | Low | 2/100 |
Local Environmental Conditions
Nearby, close to this spot, a stand of river oak lines the water, a reliable source of casuarina pollen through the warmer months. Located within the neighborhood, this area has a canopy of eucalypt threaded with wattle, wattle chief among them for allergenic potency here. Surrounding neighborhoods with similar tree cover typically see a closely comparable pollen mix.
Near the bank, river oak leads the seasonal calendar, arriving ahead of the rest of the season, cresting around mid-winter. Eucalypt and wattle nearby take over the pollen calendar through late winter, generally peaking somewhere between August and October. Grass pollen rises through spring toward a November high point, before gradually tapering off through the peak of summer into February.
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Pollen forecast neighborhoods 1 neighborhood
Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Lyalls Mill right now?
On 20 September 2026, overall pollen levels in Lyalls Mill are high. Cypress is the main contributor to airborne pollen, while myrtle, acacia, and grass remain at lower levels
Will pollen levels change in Lyalls Mill tomorrow?
On 21 September 2026, pollen conditions in Lyalls Mill will be different from today, with grass at low levels and acacia, cypress, myrtle continuing to decline
Is pollen expected to decrease in Lyalls Mill this week?
According to the five-day outlook, cypress pollen levels are expected to gradually decrease, while acacia, myrtle, and grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Lyalls Mill?
On 20 September 2026, Cypress is the dominant pollen source in Lyalls Mill. myrtle, acacia, and grass are also present but at lower levels.
When is pollen season in Lyalls Mill?
How often is the Lyalls Mill pollen forecast updated?
The Lyalls Mill pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Lyalls Mill 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 Lyalls Mill 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 Lyalls Mill, 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).
