Castlemaine pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Castlemaine is high; eucalyptus is high; acacia and cypress are moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) eucalyptus declining, acacia no longer expected, cypress no longer expected.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, and grass will increase.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Moderate | 31/100 |
| Cypress (Cupressaceae) | Moderate | 35/100 |
| 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) | None | 0/100 | |
| Eucalyptus (Myrtaceae) | Low | 16/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Castlemaine is ringed by box-ironbark forest, the classic dry goldfields eucalypt woodland of central Victoria, with a spring understorey rich in wattle; the historic town centre itself is heavily planted with exotic deciduous trees from its Victorian-era establishment. Grass pollen typically becomes the dominant local allergen through late spring and into summer, following an earlier and comparatively brief peak from flowering wattle and eucalypt in the cooler months.
Castlemaine, in Victoria's central goldfields country, sits amid box-ironbark forest and grazing land with a pollen season split between native eucalypt woodland and pasture. Tree pollen from eucalypts, wattle and cypress builds from August, while grass pollen from surrounding paddocks peaks October and November. The region's dry, forested hills and modest rainfall compared with Melbourne tend to keep the grass season a touch shorter, with dry summer conditions typically settling in by December and curbing further growth.
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Resource Hub
Pollen forecast neighborhoods 5 neighborhoods
Sports venues in Castlemaine 1 sports venue
Frequently Asked Questions About Pollen in Victoria
Is pollen high in Castlemaine right now?
On 20 September 2026, overall pollen levels in Castlemaine are high. Myrtle is the main contributor to airborne pollen, while cypress and acacia remain at lower levels
Will pollen levels change in Castlemaine tomorrow?
On 21 September 2026, pollen conditions in Castlemaine will be different from today, with myrtle continuing to decline
Is pollen expected to decrease in Castlemaine this week?
According to the five-day outlook, cypress, myrtle, grass, and acacia pollen levels will increase later in the week.
Which pollen types are currently active in Castlemaine?
On 20 September 2026, Myrtle is the dominant pollen source in Castlemaine. cypress and acacia are also present but at lower levels. grass are not currently active.
When is pollen season in Castlemaine?
How often is the Castlemaine pollen forecast updated?
The Castlemaine pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Castlemaine 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 Castlemaine 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 Castlemaine, 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).
