Castletown pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (16 September) pollen in Castletown is high; cypress is high; acacia, eucalyptus, and grass are moderate.
Pollen Tomorrow
Tomorrow (17 September 2026) acacia remains moderate, cypress declining, eucalyptus declining, grass declining.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, and grass will decrease.
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Pollen Risk
Today - 16 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Moderate | 49/100 |
| Cypress (Cupressaceae) | High | 61/100 |
| Eucalyptus (Myrtaceae) | Moderate | 32/100 |
| Grass (Poaceae) | Moderate | 31/100 |
Tomorrow - 17 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Moderate | 34/100 | |
| Cypress (Cupressaceae) | Moderate | 45/100 | |
| Eucalyptus (Myrtaceae) | Low | 17/100 | |
| Grass (Poaceae) | Low | 16/100 |
Local Environmental Conditions
River oak lines the bank, contributing some of the season's more persistent wind-borne pollen, in the vicinity. Located close to this spot, this area has a park where mown turf grass and ornamental plane trees add to local grass and tree pollen. The broader area tends to mirror this pattern, with only minor local variation.
River oak along the water gets the season underway before other species, reaching its high point sometime in late winter or early spring. Spring brings rising grass pollen that crests in November, and remaining a significant allergen right through summer until it eases in February. Neighboring parts of the region typically see this same sequence with only minor timing shifts.
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Pollen forecast neighborhoods 2 neighborhoods
Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Castletown right now?
On 16 September 2026, overall pollen levels in Castletown are high. Cypress is the main contributor to airborne pollen, while acacia, myrtle, and grass remain at lower levels
Will pollen levels change in Castletown tomorrow?
On 17 September 2026, pollen conditions in Castletown will be different from today, with acacia at moderate levels and cypress, myrtle, grass continuing to decline
Is pollen expected to decrease in Castletown this week?
According to the five-day outlook, acacia, cypress, myrtle, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Castletown?
On 16 September 2026, Cypress is the dominant pollen source in Castletown. acacia, myrtle, and grass are also present but at lower levels.
When is pollen season in Castletown?
How often is the Castletown pollen forecast updated?
The Castletown pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Castletown 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 Castletown 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 Castletown, 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).
