Sir Lowry's Pass pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Sir Lowry's Pass is moderate; cypress, eucalyptus, mugwort, mulberry, and nettle are moderate; grass and plane are low.
Pollen Tomorrow
Tomorrow (21 September 2026) cypress remains moderate, grass remains low, mugwort remains moderate, mulberry remains moderate, plane remains low, nettle remains moderate, eucalyptus declining.
7-Day Trend
Over the next week cypress, eucalyptus, grass, mugwort, mulberry, plane, and nettle will increase; oak will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | Moderate | 39/100 |
| Eucalyptus (Myrtaceae) | Moderate | 26/100 |
| Grass (Poaceae) | Low | 23/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 50/100 |
| Mulberry (Morus) | Moderate | 33/100 |
| Plane (Platanus) | Low | 19/100 |
| Nettle (Urtica) | Moderate | 50/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | Moderate | 37/100 | |
| Eucalyptus (Myrtaceae) | Low | 24/100 | |
| Grass (Poaceae) | Low | 21/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 49/100 | |
| Mulberry (Morus) | Moderate | 31/100 | |
| Plane (Platanus) | Low | 17/100 | |
| Nettle (Urtica) | Moderate | 50/100 |
Local Environmental Conditions
Here, a short distance from here, the nearest stream or river hosts acacia and eucalyptus, two of the most allergenic early-season trees. Here, in the wider area, forest where oak and eucalyptus make up much of the canopy, driving spring pollen counts. Comparable land cover in surrounding areas tends to produce a similar pollen mix overall.
Near the bank, acacia and eucalyptus lead the seasonal calendar, usually peaking sometime between late winter and the end of September. By mid-spring, oak and eucalyptus in the woods take over, reaching its high point through October and into November. Grass pollen counts rise through late spring, reaching their peak around December, with ragweed then rising to the fore from mid-February through April.
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Frequently Asked Questions About Pollen in Western Cape
Is pollen high in Sir Lowry's Pass right now?
On 20 September 2026, overall pollen levels in Sir Lowry's Pass are moderate. Cypress is the main contributor to airborne pollen, while morus, myrtle, urtica, artemisia, platanus, and grass remain at lower levels
Will pollen levels change in Sir Lowry's Pass tomorrow?
On 21 September 2026, pollen conditions in Sir Lowry's Pass will be different from today, with cypress at moderate levels, morus at moderate levels, platanus at low levels, grass at low levels, urtica at moderate levels, artemisia at moderate levels and myrtle continuing to decline
Is pollen expected to decrease in Sir Lowry's Pass this week?
According to the five-day outlook, cypress, morus, myrtle, platanus, grass, urtica, and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Sir Lowry's Pass?
On 20 September 2026, Cypress is the dominant pollen source in Sir Lowry's Pass. morus, myrtle, urtica, artemisia, platanus, and grass are also present but at lower levels. oak are not currently active.
When is pollen season in Sir Lowry's Pass?
How often is the Sir Lowry's Pass pollen forecast updated?
The Sir Lowry's Pass pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Sir Lowry's Pass 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 Sir Lowry's Pass 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 Sir Lowry's Pass, 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. |
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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).
