Excelsior pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Excelsior is low; cypress, eucalyptus, mugwort, mulberry, plane, and nettle are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
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) | Low | 3/100 |
| Eucalyptus (Myrtaceae) | Low | 2/100 |
| Grass (Poaceae) | None | 0/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 2/100 |
| Mulberry (Morus) | Low | 3/100 |
| Plane (Platanus) | Low | 2/100 |
| Nettle (Urtica) | Low | 1/100 |
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 | 16/100 | |
| Eucalyptus (Myrtaceae) | Low | 15/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 15/100 | |
| Mulberry (Morus) | Low | 16/100 | |
| Plane (Platanus) | Low | 15/100 | |
| Nettle (Urtica) | Low | 14/100 |
Local Environmental Conditions
Excelsior lies roughly 80 km east-northeast of Bloemfontein. Eucalyptus, acacia, and open grassland define the vegetation around Excelsior, with exposure shifting between leafier residential pockets and busier commercial corridors nearby. The surrounding area's maize, sunflower, and grain farming operations shapes much of the land beyond the town, adding grass and dust to the seasonal pollen mix each summer, consistent with the wider Highveld plateau environment.
Pollen at Excelsior builds from August as acacia and eucalyptus flower, with Highveld grass taking over through October and November. The elevated plateau's dry winter suppresses production until the spring rains arrive, and the area's maize, sunflower, and grain farming operations adds a distinctive local backdrop to the grass-dominated summer pollen season, a pattern typical of the wider Highveld region.
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Frequently Asked Questions About Pollen in Free State
Is pollen high in Excelsior right now?
On 20 September 2026, overall pollen levels in Excelsior are low. Cypress is the main contributor to airborne pollen, while morus, myrtle, platanus, urtica, and artemisia remain at lower levels
Will pollen levels change in Excelsior tomorrow?
On 21 September 2026, pollen conditions in Excelsior will be similar to today, with cypress at low levels, morus at low levels, myrtle at low levels, platanus at low levels, urtica at low levels, artemisia at low levels
Is pollen expected to decrease in Excelsior this week?
According to the five-day outlook, cypress, morus, myrtle, platanus, urtica, and artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Excelsior?
On 20 September 2026, Cypress is the dominant pollen source in Excelsior. morus, myrtle, platanus, urtica, and artemisia are also present but at lower levels. grass and oak are not currently active.
When is pollen season in Excelsior?
How often is the Excelsior pollen forecast updated?
The Excelsior pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Excelsior 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 Excelsior 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 Excelsior, 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).
