Hamilton pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Hamilton is moderate; cypress is moderate; acacia, eucalyptus, and grass are low.
Pollen Tomorrow
Tomorrow (21 September 2026) acacia no longer expected, cypress no longer expected, eucalyptus no longer expected, grass 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) | Low | 11/100 |
| Cypress (Cupressaceae) | Moderate | 27/100 |
| Eucalyptus (Myrtaceae) | Low | 12/100 |
| Grass (Poaceae) | Low | 6/100 |
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) | None | 0/100 |
Local Environmental Conditions
Hamilton's Western District setting is defined by cleared basalt plains given over to sheep and cattle grazing, historically the foundation of the town's wool wealth. Remnant eucalypt woodland and wattle scrub persist in reserves and along the region's volcanic crater lakes, while introduced pasture grasses dominate open paddocks. The nearby Grampians add a forested backdrop, but Hamilton's immediate pollen exposure is shaped mainly by grazing-land grasses and scattered native trees.
Known as Victoria's "Wool City," Hamilton sits on the basalt plains of the Western District, where sheep grazing shapes the landscape and pollen calendar alike. Eucalypt and wattle flower from August, with introduced pasture grasses across the volcanic plains peaking October to December. The region's proximity to the Grampians and its volcanic lakes district brings cooler, changeable spring weather, and the same warm-to-storm transitions that trigger thunderstorm asthma elsewhere in southeastern Australia are a recognised spring risk here too.
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Resource Hub
Pollen forecast neighborhoods 8 neighborhoods
Sports venues in Hamilton 2 sports venues
Frequently Asked Questions About Pollen in Victoria
Is pollen high in Hamilton right now?
On 20 September 2026, overall pollen levels in Hamilton are moderate. Cypress is the main contributor to airborne pollen, while acacia, myrtle, and grass remain at lower levels
Will pollen levels change in Hamilton tomorrow?
On 21 September 2026, pollen conditions in Hamilton will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Hamilton this week?
According to the five-day outlook, acacia, cypress, myrtle, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Hamilton?
On 20 September 2026, Cypress is the dominant pollen source in Hamilton. acacia, myrtle, and grass are also present but at lower levels.
When is pollen season in Hamilton?
How often is the Hamilton pollen forecast updated?
The Hamilton pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Hamilton 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 Hamilton 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 Hamilton, 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).
