Fremantle pollen forecast — Samson neighborhood
Pollen Today
Today (20 September) pollen in Samson, Fremantle is low; acacia, cypress, eucalyptus, and grass are low.
Pollen Tomorrow
Tomorrow (21 September 2026) acacia remains low, cypress remains low, eucalyptus no longer expected, grass no longer expected.
7-Day Trend
Over the next week acacia, eucalyptus, and grass will increase; cypress will decrease.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 4/100 |
| Cypress (Cupressaceae) | Low | 13/100 |
| Eucalyptus (Myrtaceae) | Low | 1/100 |
| Grass (Poaceae) | Low | 1/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 4/100 | |
| Cypress (Cupressaceae) | Low | 12/100 | |
| Eucalyptus (Myrtaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Nearby, in the surrounding area, the tree cover here leans heavily on plane tree and eucalypt, both key drivers of spring pollen. Nearby, in the wider area, a park combining lawn grass and planted trees, both minor but real contributors to pollen here. Year-to-year swings in rainfall and wind can shift this picture somewhat either way.
In Samson, temperatures climbing to 16.5°C by September likely mark the start of the main pollen release, with humidity around 74% helping keep counts airborne. Warmer conditions by December (22.4°C, 63% humidity) sustain grass pollen through the season, before rainfall of 22mm in March and cooling toward 16.9°C in June bring the season to a close.
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Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Fremantle right now?
On 20 September 2026, overall pollen levels in Fremantle are low. Cypress is the main contributor to airborne pollen, while myrtle, grass, and acacia remain at lower levels
Will pollen levels change in Fremantle tomorrow?
On 21 September 2026, pollen conditions in Fremantle will be different from today, with cypress at low levels, acacia at low levels
Is pollen expected to decrease in Fremantle this week?
According to the five-day outlook, cypress pollen levels are expected to gradually decrease, while myrtle, grass, and acacia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Fremantle?
On 20 September 2026, Cypress is the dominant pollen source in Fremantle. myrtle, grass, and acacia are also present but at lower levels.
When is pollen season in Fremantle?
How often is the Fremantle pollen forecast updated?
The Fremantle pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Fremantle 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 Fremantle 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 Fremantle, 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).
