Shire of Serpentine-Jarrahdale pollen forecast — Keysbrook neighborhood
Pollen Today
Today (20 September) pollen in Keysbrook, Shire of Serpentine-Jarrahdale is low; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass will decrease; acacia, cypress, and eucalyptus will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Eucalyptus (Myrtaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 12/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | None | 0/100 | |
| Cypress (Cupressaceae) | None | 0/100 | |
| Eucalyptus (Myrtaceae) | None | 0/100 | |
| Grass (Poaceae) | Low | 18/100 |
Local Environmental Conditions
No major forest, water, or park sits nearby, so open-ground grass and roadside plantain and weed likely account for most local pollen. Ground-level conditions like local landscaping can nudge these figures slightly either way. Nearby weather stations report comparable trends across the broader stretch of the county. Small shifts in elevation or soil type can move these figures a little either way.
In Keysbrook, temperatures climbing to 12.7°C by September likely mark the start of the main pollen release, with humidity around 80% helping keep counts airborne. Warmer conditions by December (23.5°C, 45% humidity) sustain grass pollen through the season, before rainfall of 17mm in March and cooling toward 11.6°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 Shire of Serpentine-Jarrahdale right now?
On 20 September 2026, overall pollen levels in Shire of Serpentine-Jarrahdale are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Shire of Serpentine-Jarrahdale tomorrow?
On 21 September 2026, pollen conditions in Shire of Serpentine-Jarrahdale will be similar to today, with grass at low levels
Is pollen expected to decrease in Shire of Serpentine-Jarrahdale this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Shire of Serpentine-Jarrahdale?
On 20 September 2026, Grass is the dominant pollen source in Shire of Serpentine-Jarrahdale. cypress, myrtle, and acacia are not currently active.
When is pollen season in Shire of Serpentine-Jarrahdale?
How often is the Shire of Serpentine-Jarrahdale pollen forecast updated?
The Shire of Serpentine-Jarrahdale pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Shire of Serpentine-Jarrahdale 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 Shire of Serpentine-Jarrahdale 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 Shire of Serpentine-Jarrahdale, 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).
