Guilderton pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Guilderton is moderate; acacia and cypress are moderate; eucalyptus and grass are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
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) | Moderate | 44/100 |
| Cypress (Cupressaceae) | Moderate | 39/100 |
| Eucalyptus (Myrtaceae) | Low | 6/100 |
| Grass (Poaceae) | Low | 17/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Moderate | 41/100 | |
| Cypress (Cupressaceae) | Moderate | 35/100 | |
| Eucalyptus (Myrtaceae) | Low | 3/100 | |
| Grass (Poaceae) | Low | 14/100 |
Local Environmental Conditions
Water here is bordered by river oak, a casuarina species known for prolific, far-carrying pollen, a short distance from here. A canopy of eucalypt threaded with wattle, wattle chief among them for allergenic potency here; this sits near this part of town. A green space of mown lawn and planted plane trees, both feeding into local pollen counts, a short distance from here.
The waterside river oak is consistently first to release pollen each year, arriving ahead of the rest of the season, cresting around mid-winter. As spring approaches, eucalypt and wattle in the nearby woodland become the dominant source, cresting around August and September in the year's sharpest tree-pollen spike. As spring turns to summer, grass pollen rises toward its November high, before staying elevated through the summer months into late January.
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Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Guilderton right now?
On 20 September 2026, overall pollen levels in Guilderton are moderate. Acacia is the main contributor to airborne pollen, while cypress, grass, and myrtle remain at lower levels
Will pollen levels change in Guilderton tomorrow?
On 21 September 2026, pollen conditions in Guilderton will be similar to today, with grass at low levels, acacia at moderate levels, cypress at moderate levels, myrtle at low levels
Is pollen expected to decrease in Guilderton this week?
According to the five-day outlook, cypress pollen levels are expected to gradually decrease, while grass, acacia, and myrtle pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Guilderton?
On 20 September 2026, Acacia is the dominant pollen source in Guilderton. cypress, grass, and myrtle are also present but at lower levels.
When is pollen season in Guilderton?
How often is the Guilderton pollen forecast updated?
The Guilderton pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Guilderton 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 Guilderton 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 Guilderton, 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).
