Penrith pollen forecast — Mill Dam Falls neighborhood
Pollen Today
Today (20 September) pollen in Mill Dam Falls, Penrith is moderate; acacia, cypress, and eucalyptus are moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) acacia declining, cypress declining, eucalyptus declining.
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) | Moderate | 36/100 |
| Cypress (Cupressaceae) | Moderate | 45/100 |
| Eucalyptus (Myrtaceae) | Moderate | 44/100 |
| Grass (Poaceae) | None | 0/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 10/100 | |
| Cypress (Cupressaceae) | Low | 19/100 | |
| Eucalyptus (Myrtaceae) | Low | 19/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Here, close to home here, the water's edge is thick with wattle and casuarina, whose pollen spreads readily in early spring. A wooded stretch of plane tree and eucalypt, with eucalypt responsible for some of the sharpest spring counts, within the local area. Local readings for the surrounding area tend to follow this same general pattern.
In Mill Dam Falls, temperatures climbing to 14.3°C by September likely mark the start of the main pollen release, with humidity around 64% helping keep counts airborne. Warmer conditions by December (21.8°C, 62% humidity) sustain grass pollen through the season, before rainfall of 207mm in March and cooling toward 9.5°C in June bring the season to a close.
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Frequently Asked Questions About Pollen in New South Wales
Is pollen high in Penrith right now?
On 20 September 2026, overall pollen levels in Penrith are moderate. Acacia is the main contributor to airborne pollen, while cypress and myrtle remain at lower levels
Will pollen levels change in Penrith tomorrow?
On 21 September 2026, pollen conditions in Penrith will be different from today, with acacia, cypress, myrtle continuing to decline
Is pollen expected to decrease in Penrith 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 Penrith?
On 20 September 2026, Acacia is the dominant pollen source in Penrith. cypress and myrtle are also present but at lower levels. grass are not currently active.
When is pollen season in Penrith?
How often is the Penrith pollen forecast updated?
The Penrith pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Penrith 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 Penrith 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 Penrith, 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).
