Worcester pollen forecast — Zwelethemba neighborhood
Pollen Today
Today (20 September) pollen in Zwelethemba, Worcester is moderate; mugwort and nettle are moderate; cypress, eucalyptus, grass, mulberry, and plane are low.
Pollen Tomorrow
Tomorrow (21 September 2026) cypress remains low, eucalyptus remains low, grass remains low, mulberry remains low, plane remains low, mugwort declining, nettle 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) | Low | 17/100 |
| Eucalyptus (Myrtaceae) | Low | 14/100 |
| Grass (Poaceae) | Low | 14/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 27/100 |
| Mulberry (Morus) | Low | 16/100 |
| Plane (Platanus) | Low | 14/100 |
| Nettle (Urtica) | Moderate | 32/100 |
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) | Low | 4/100 | |
| Eucalyptus (Myrtaceae) | Low | 2/100 | |
| Grass (Poaceae) | Low | 2/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 15/100 | |
| Mulberry (Morus) | Low | 4/100 | |
| Plane (Platanus) | Low | 2/100 | |
| Nettle (Urtica) | Low | 20/100 |
Local Environmental Conditions
Zwelethemba lies roughly 100 km east-northeast of Cape Town. Zwelethemba's plant life leans on fynbos scrub alongside introduced oak and pine, with exposure shifting between these green pockets and the more built-up parts of the area. The surrounding vineyard and wine estate operations adds further variety, and fynbos remains the dominant spring pollen source most years, consistent with the broader Cape fynbos biome.
Fynbos scrub and oak dominate the pollen calendar at Zwelethemba, opening in August and building toward a grass-driven peak in September and October. The area's vineyard and wine estate operations contributes further seasonal variation, while the long, dry Cape summer that follows keeps levels consistently low until winter returns, a pattern typical of the broader Cape fynbos biome.
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Frequently Asked Questions About Pollen in Western Cape
Is pollen high in Worcester right now?
On 20 September 2026, overall pollen levels in Worcester are moderate. Urtica is the main contributor to airborne pollen, while artemisia, platanus, grass, cypress, morus, and myrtle remain at lower levels
Will pollen levels change in Worcester tomorrow?
On 21 September 2026, pollen conditions in Worcester will be different from today, with platanus at low levels, grass at low levels, cypress at low levels, morus at low levels, myrtle at low levels and urtica, artemisia continuing to decline
Is pollen expected to decrease in Worcester this week?
According to the five-day outlook, platanus, grass, urtica, artemisia, cypress, morus, and myrtle pollen levels will increase later in the week.
Which pollen types are currently active in Worcester?
On 20 September 2026, Urtica is the dominant pollen source in Worcester. artemisia, platanus, grass, cypress, morus, and myrtle are also present but at lower levels. oak are not currently active.
When is pollen season in Worcester?
How often is the Worcester pollen forecast updated?
The Worcester pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Worcester 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 Worcester 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 Worcester, 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).
