Southern Lookout, Hornsby Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Southern Lookout, Hornsby is high; eucalyptus is high; acacia and cypress are moderate.
Pollen Tomorrow
Tomorrow (11 October 2026) acacia declining, cypress declining, eucalyptus declining.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, and grass will increase.
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Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Moderate | 38/100 |
| Cypress (Cupressaceae) | Moderate | 50/100 |
| Eucalyptus (Myrtaceae) | High | 69/100 |
| Grass (Poaceae) | None | 0/100 |
Tomorrow - 11 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 5/100 | |
| Cypress (Cupressaceae) | Low | 16/100 | |
| Eucalyptus (Myrtaceae) | Moderate | 37/100 | |
| Grass (Poaceae) | None | 0/100 |
Local Environmental Conditions
The landscape around this part of Hornsby is heavily wooded, with some built-up land. The damp ground beside a watercourse nearby supports trees, shrubs and reeds, adding to local pollen. Of the allergenic trees nearby, olive matters most, while maple also contributes. Grasses and weeds such as pigweed and plantain round out the local mix.
Tree pollen peaks in early spring, when the weather warms to around 15°C and olive and maple are in full flower. Grasses take over in mid-spring and keep pollen in the air into early fall. Pigweed and plantain bring a final peak from early summer into early fall. Rain is heaviest in fall, often giving short breaks from high pollen levels.
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Frequently Asked Questions About Pollen in New South Wales
Is pollen high in Hornsby right now?
On 10 October 2026, overall pollen levels in Hornsby are high. Myrtle is the main contributor to airborne pollen, while acacia and cypress remain at lower levels
Will pollen levels change in Hornsby tomorrow?
On 11 October 2026, pollen conditions in Hornsby will be different from today, with acacia, cypress, myrtle continuing to decline
Is pollen expected to decrease in Hornsby this week?
According to the five-day outlook, acacia, cypress, myrtle, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Hornsby?
On 10 October 2026, Myrtle is the dominant pollen source in Hornsby. acacia and cypress are also present but at lower levels. grass are not currently active.
When is pollen season in Hornsby?
How often is the Hornsby pollen forecast updated?
The Hornsby pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Hornsby 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 Hornsby 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 Hornsby, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
