Port Stephens pollen forecast — Osterley neighborhood
Pollen Today
Today (20 September) pollen in Osterley, Port Stephens is moderate; acacia and cypress are moderate; eucalyptus is low.
Pollen Tomorrow
Tomorrow (21 September 2026) cypress remains moderate, acacia declining, eucalyptus no longer expected.
7-Day Trend
Over the next week acacia, cypress, and eucalyptus will increase; grass will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Moderate | 30/100 |
| Cypress (Cupressaceae) | Moderate | 50/100 |
| Eucalyptus (Myrtaceae) | Low | 20/100 |
| Grass (Poaceae) | None | 0/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 7/100 | |
| Cypress (Cupressaceae) | Moderate | 27/100 | |
| Eucalyptus (Myrtaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
Located close to home here, this area has a stretch of wattle and casuarina lines the water, feeding some of spring's earliest pollen. Located a short distance from here, this area has a stand of plane tree and eucalypt, the latter ranked among the region's most potent tree allergens. Seasonal timing here generally tracks the wider region, give or take a week or so.
In Osterley, temperatures climbing to 16.3°C by September likely mark the start of the main pollen release, with humidity around 66% helping keep counts airborne. Warmer conditions by December (23.1°C, 64% humidity) sustain grass pollen through the season, before rainfall of 172mm in March and cooling toward 12.2°C in June bring the season to a close.
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Frequently Asked Questions About Pollen in New South Wales
Is pollen high in Port Stephens right now?
On 20 September 2026, overall pollen levels in Port Stephens are moderate. Acacia is the main contributor to airborne pollen, while cypress and myrtle remain at lower levels
Will pollen levels change in Port Stephens tomorrow?
On 21 September 2026, pollen conditions in Port Stephens will be different from today, with cypress at moderate levels and acacia continuing to decline
Is pollen expected to decrease in Port Stephens this week?
According to the five-day outlook, acacia, cypress, and myrtle pollen levels will increase later in the week.
Which pollen types are currently active in Port Stephens?
On 20 September 2026, Acacia is the dominant pollen source in Port Stephens. cypress and myrtle are also present but at lower levels. grass are not currently active.
When is pollen season in Port Stephens?
How often is the Port Stephens pollen forecast updated?
The Port Stephens pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Port Stephens 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 Port Stephens 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 Port Stephens, 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).
