Glenbrook pollen forecast — Chalmers Lookout neighborhood
Pollen Today
Today (20 September) pollen in Chalmers Lookout, Glenbrook is high; eucalyptus is high; cypress is moderate; acacia is low.
Pollen Tomorrow
Tomorrow (21 September 2026) cypress declining, eucalyptus declining, acacia no longer expected.
7-Day Trend
Over the next week acacia, cypress, and eucalyptus will increase; grass will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 21/100 |
| Cypress (Cupressaceae) | Moderate | 41/100 |
| Eucalyptus (Myrtaceae) | High | 52/100 |
| Grass (Poaceae) | None | 0/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | None | 0/100 | |
| Cypress (Cupressaceae) | Low | 15/100 | |
| Eucalyptus (Myrtaceae) | Moderate | 26/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Located in the surrounding area, this area has river oak lines the bank, contributing some of the season's more persistent wind-borne pollen. A stand of eucalypt with wattle through the understorey, wattle ranked among the region's sharpest allergens, not far from here. Actual counts still shift year to year with temperature, rainfall, and prevailing wind.
The water-adjacent river oak is an early riser, usually peaking sometime between July and September. Once river oak fades, eucalypt and wattle in the woods carry the season forward, usually hitting its highest point sometime between mid-August and mid-September. Through spring, grass pollen climbs steadily toward its November peak, before continuing at a lower but still notable level through January and February.
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Frequently Asked Questions About Pollen in New South Wales
Is pollen high in Glenbrook right now?
On 20 September 2026, overall pollen levels in Glenbrook are high. Myrtle is the main contributor to airborne pollen, while cypress and acacia remain at lower levels
Will pollen levels change in Glenbrook tomorrow?
On 21 September 2026, pollen conditions in Glenbrook will be different from today, with cypress, myrtle continuing to decline
Is pollen expected to decrease in Glenbrook this week?
According to the five-day outlook, acacia, cypress, and myrtle pollen levels will increase later in the week.
Which pollen types are currently active in Glenbrook?
On 20 September 2026, Myrtle is the dominant pollen source in Glenbrook. cypress and acacia are also present but at lower levels. grass are not currently active.
When is pollen season in Glenbrook?
How often is the Glenbrook pollen forecast updated?
The Glenbrook pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Glenbrook 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 Glenbrook 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 Glenbrook, 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).
