Swan Hill pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Swan Hill is high; acacia and cypress are high; eucalyptus is moderate; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) acacia declining, cypress declining, 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) | High | 56/100 |
| Cypress (Cupressaceae) | High | 52/100 |
| Eucalyptus (Myrtaceae) | Moderate | 30/100 |
| Grass (Poaceae) | Low | 25/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 7/100 | |
| Cypress (Cupressaceae) | Low | 3/100 | |
| Eucalyptus (Myrtaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Swan Hill sits on the Murray River in Victoria's Mallee region, where river red gums line the waterway and irrigated farmland, orchards and vineyards dominate the immediate surrounds. Further from the river, the landscape reverts to mallee eucalypt scrub and saltbush typical of semi-arid north-west Victoria. This combination of intensive irrigated agriculture and native mallee vegetation shapes the local pollen and vegetation profile.
Swan Hill's pollen season centres on spring, when grasses across the surrounding Murray River irrigation districts and dryland farms green up and flower, typically from September through November. Orchard and vineyard crops in the district also flower in spring, adding to the load, while the hot, dry Mallee summer suppresses most further activity. Native mallee eucalypts and saltbush contribute lower background pollen through the cooler months, in a pattern shaped by the region's semi-arid, river-fed agricultural landscape.
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Frequently Asked Questions About Pollen in Victoria
Is pollen high in Swan Hill right now?
On 20 September 2026, overall pollen levels in Swan Hill are high. Cypress is the main contributor to airborne pollen, while acacia, myrtle, and grass remain at lower levels
Will pollen levels change in Swan Hill tomorrow?
On 21 September 2026, pollen conditions in Swan Hill will be different from today, with cypress, acacia continuing to decline
Is pollen expected to decrease in Swan Hill 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 Swan Hill?
On 20 September 2026, Cypress is the dominant pollen source in Swan Hill. acacia, myrtle, and grass are also present but at lower levels.
When is pollen season in Swan Hill?
How often is the Swan Hill pollen forecast updated?
The Swan Hill pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Swan Hill 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 Swan Hill 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 Swan Hill, 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).
