Swellendam pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Swellendam is moderate; cypress, eucalyptus, mugwort, mulberry, and nettle are moderate; grass and plane are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, eucalyptus, mugwort, mulberry, and nettle will increase; grass and plane will decrease; 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 | 45/100 |
| Eucalyptus (Myrtaceae) | Moderate | 33/100 |
| Grass (Poaceae) | Low | 11/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 50/100 |
| Mulberry (Morus) | Moderate | 36/100 |
| 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 | 46/100 | |
| Eucalyptus (Myrtaceae) | Moderate | 35/100 | |
| Grass (Poaceae) | Low | 12/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 50/100 | |
| Mulberry (Morus) | Moderate | 37/100 | |
| Plane (Platanus) | Low | 21/100 | |
| Nettle (Urtica) | Moderate | 50/100 |
Local Environmental Conditions
Swellendam lies roughly 190 km east of Cape Town. Swellendam's greenery leans on native fynbos outside town and introduced oak and pine within it, set against a backdrop of wheat farming and small-town activity. The contrast between hardy native scrub and planted trees shapes how pollen exposure varies from one part of the area to another. This pattern holds true across most of the surrounding Cape fynbos belt.
Winter rain at Swellendam sets up an August-to-November fynbos and oak season, with grass taking over the peak by September and October near wheat farming and small-town activity. What follows is a long, dry Cape summer where pollen counts fall away almost entirely. This mirrors the broader seasonal pattern seen across much of the Cape fynbos belt.
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Resource Hub
Pollen forecast neighborhoods 2 neighborhoods
Sports venues in Swellendam 1 sports venue
Frequently Asked Questions About Pollen in Western Cape
Is pollen high in Swellendam right now?
On 20 September 2026, overall pollen levels in Swellendam are moderate. Urtica is the main contributor to airborne pollen, while artemisia, cypress, morus, myrtle, platanus, and grass remain at lower levels
Will pollen levels change in Swellendam tomorrow?
On 21 September 2026, pollen conditions in Swellendam will be similar to today, with platanus at low levels, grass at low levels, 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 Swellendam this week?
According to the five-day outlook, platanus and grass pollen levels are expected to gradually decrease, while urtica, artemisia, cypress, morus, and myrtle pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Swellendam?
On 20 September 2026, Urtica is the dominant pollen source in Swellendam. artemisia, cypress, morus, myrtle, platanus, and grass are also present but at lower levels. oak are not currently active.
When is pollen season in Swellendam?
How often is the Swellendam pollen forecast updated?
The Swellendam pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Swellendam 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 Swellendam 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 Swellendam, 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).
