Knysna pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Knysna is moderate; cypress, eucalyptus, mugwort, mulberry, and nettle are moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, eucalyptus, grass, mugwort, mulberry, and nettle will increase; oak and plane will remain stable.
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Features and forecast availability vary by region.
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 | 50/100 |
| Eucalyptus (Myrtaceae) | Moderate | 42/100 |
| Grass (Poaceae) | None | 0/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 50/100 |
| Mulberry (Morus) | Moderate | 36/100 |
| Plane (Platanus) | None | 0/100 |
| 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 | 50/100 | |
| Eucalyptus (Myrtaceae) | Moderate | 41/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 50/100 | |
| Mulberry (Morus) | Moderate | 35/100 | |
| Plane (Platanus) | None | 0/100 | |
| Nettle (Urtica) | Moderate | 50/100 |
Local Environmental Conditions
Knysna's Garden Route lagoon setting features yellowwood, stinkwood, and coastal fynbos as the main pollen sources in one of South Africa's most biodiverse urban settings. Exposure varies between the extensive Knysna Forest indigenous woodland above the town and the more built-up lagoon waterfront commercial areas, while the Knysna River lagoon creates a distinctive coastal pollen environment and the indigenous forest contributes exceptional tree pollen diversity.
Knysna's Garden Route lagoon season opens in July with wattle and coastal fynbos before yellowwood and stinkwood indigenous forest trees peak through September and October. Grass from surrounding farmland peaks through November, while the extensive Knysna Forest above contributes exceptional indigenous tree pollen diversity and the Knysna River lagoon creates a distinctive coastal pollen environment unlike most South African cities.
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Resource Hub
Pollen forecast neighborhoods 3 neighborhoods
Sports venues in Knysna 4 sports venues
Local parkruns 1 parkrun
Frequently Asked Questions About Pollen in Western Cape
Is pollen high in Knysna right now?
On 20 September 2026, overall pollen levels in Knysna are moderate. Urtica is the main contributor to airborne pollen, while artemisia, cypress, morus, and myrtle remain at lower levels
Will pollen levels change in Knysna tomorrow?
On 21 September 2026, pollen conditions in Knysna will be similar to today, with urtica at moderate levels, artemisia at moderate levels, cypress at moderate levels, morus at moderate levels, myrtle at moderate levels
Is pollen expected to decrease in Knysna this week?
According to the five-day outlook, grass, urtica, artemisia, cypress, morus, and myrtle pollen levels will increase later in the week.
Which pollen types are currently active in Knysna?
On 20 September 2026, Urtica is the dominant pollen source in Knysna. artemisia, cypress, morus, and myrtle are also present but at lower levels. platanus, grass, and oak are not currently active.
When is pollen season in Knysna?
How often is the Knysna pollen forecast updated?
The Knysna pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Knysna 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 Knysna 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 Knysna, 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).
