Bloemfontein pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Bloemfontein is moderate; cypress, eucalyptus, mugwort, and mulberry are moderate; plane and nettle are low.
Pollen Tomorrow
Tomorrow (21 September 2026) cypress remains moderate, eucalyptus remains moderate, mugwort remains moderate, mulberry remains moderate, nettle remains low, plane increasing.
7-Day Trend
Over the next week cypress, eucalyptus, mugwort, mulberry, plane, and nettle will decrease; grass and 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 | 40/100 |
| Eucalyptus (Myrtaceae) | Moderate | 35/100 |
| Grass (Poaceae) | None | 0/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 32/100 |
| Mulberry (Morus) | Moderate | 35/100 |
| Plane (Platanus) | Low | 22/100 |
| Nettle (Urtica) | Low | 9/100 |
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 | 47/100 | |
| Eucalyptus (Myrtaceae) | Moderate | 41/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 38/100 | |
| Mulberry (Morus) | Moderate | 42/100 | |
| Plane (Platanus) | Moderate | 29/100 | |
| Nettle (Urtica) | Low | 16/100 |
Local Environmental Conditions
Bloemfontein's Free State Highveld setting features acacia, eucalyptus, and weeping willow as the main tree pollen sources alongside mixed Highveld grassland. Exposure varies between the greener Naval Hill and residential areas and the more built-up commercial corridors, while the flat, open Highveld landscape allows grass pollen from surrounding farmland to disperse very widely throughout the city.
Bloemfontein's Free State Highveld season is strongly driven by the summer rainfall pattern, with acacia contributing from August before grass from surrounding Highveld farmland peaks intensely through October and November. The flat, open Highveld landscape allows pollen to disperse very widely, while the dry winter months of June and July suppress most pollen production across this semi-arid Free State capital.
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Frequently Asked Questions About Pollen in Free State
Is pollen high in Bloemfontein right now?
On 20 September 2026, overall pollen levels in Bloemfontein are moderate. Artemisia is the main contributor to airborne pollen, while cypress, morus, myrtle, platanus, and urtica remain at lower levels
Will pollen levels change in Bloemfontein tomorrow?
On 21 September 2026, pollen conditions in Bloemfontein will be different from today, with artemisia at moderate levels, cypress at moderate levels, morus at moderate levels, myrtle at moderate levels, urtica at low levels and platanus increasing
Is pollen expected to decrease in Bloemfontein this week?
According to the five-day outlook, artemisia, cypress, morus, myrtle, platanus, and urtica pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Bloemfontein?
On 20 September 2026, Artemisia is the dominant pollen source in Bloemfontein. cypress, morus, myrtle, platanus, and urtica are also present but at lower levels. grass and oak are not currently active.
When is pollen season in Bloemfontein?
How often is the Bloemfontein pollen forecast updated?
The Bloemfontein pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Bloemfontein 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 Bloemfontein 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 Bloemfontein, 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).
