Shannon pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Shannon is high; eucalyptus is high; cypress is moderate; acacia and grass are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week eucalyptus will increase; acacia and cypress will decrease; grass will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 10/100 |
| Cypress (Cupressaceae) | Moderate | 40/100 |
| Eucalyptus (Myrtaceae) | High | 58/100 |
| Grass (Poaceae) | Low | 4/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 13/100 | |
| Cypress (Cupressaceae) | Moderate | 42/100 | |
| Eucalyptus (Myrtaceae) | High | 61/100 | |
| Grass (Poaceae) | Low | 7/100 |
Local Environmental Conditions
Here, close by, water here is bordered by river oak, a casuarina species known for prolific, far-carrying pollen. Located within easy reach, this area has eucalypt and wattle growing together, with wattle's fine pollen especially potent during its short flowering window. Ground-level conditions like local landscaping can nudge these figures slightly either way.
The waterside river oak is consistently first to release pollen each year, reaching its high point sometime in late winter or early spring. Eucalypt and wattle in the woods pick up where river oak leaves off, generally peaking somewhere between August and October. Grass pollen takes over next, building to a peak around November, before staying elevated through the summer months into late January.
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Pollen forecast neighborhoods 6 neighborhoods
Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Shannon right now?
On 20 September 2026, overall pollen levels in Shannon are high. Myrtle is the main contributor to airborne pollen, while cypress, acacia, and grass remain at lower levels
Will pollen levels change in Shannon tomorrow?
On 21 September 2026, pollen conditions in Shannon will be similar to today, with acacia at low levels, cypress at moderate levels, myrtle at high levels, grass at low levels
Is pollen expected to decrease in Shannon this week?
According to the five-day outlook, acacia and cypress pollen levels are expected to gradually decrease, while myrtle pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Shannon?
On 20 September 2026, Myrtle is the dominant pollen source in Shannon. cypress, acacia, and grass are also present but at lower levels.
When is pollen season in Shannon?
How often is the Shannon pollen forecast updated?
The Shannon pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Shannon 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 Shannon 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 Shannon, 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).
