Port St Johns Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Port St Johns is moderate; cypress and nettle are moderate; eucalyptus, mugwort, mulberry, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) cypress remains moderate, nettle remains moderate, mold (alternaria) remains low, mold (cladosporium) remains low, eucalyptus increasing, mugwort increasing, mulberry increasing.
7-Day Trend
Over the next week grass and mold (cladosporium) will increase; cypress, eucalyptus, mugwort, mulberry, nettle, and mold (alternaria) will decrease; oak and plane will remain stable.
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Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | Moderate | 35/100 |
| Eucalyptus (Myrtaceae) | Low | 9/100 |
| Grass (Poaceae) | None | 0/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 22/100 |
| Mulberry (Morus) | Low | 23/100 |
| Plane (Platanus) | None | 0/100 |
| Nettle (Urtica) | Moderate | 45/100 |
| Mold (Alternaria) | Low | 15/100 |
| Mold (Cladosporium) | Low | 22/100 |
Tomorrow - 11 October
| 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 | 28/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 39/100 | |
| Mulberry (Morus) | Moderate | 41/100 | |
| Plane (Platanus) | None | 0/100 | |
| Nettle (Urtica) | Moderate | 50/100 | |
| Mold (Alternaria) | Low | 21/100 | |
| Mold (Cladosporium) | Low | 23/100 |
Local Environmental Conditions
The center of Port St Johns is heavily wooded. The surrounding woodland makes trees an important local pollen source. Clearings, tracks and woodland edges let grasses and other flowering plants grow among the trees. Much of the pollen in dense woodland is released high in the canopy, where the wind carries it easily.
Tree pollen comes first, peaking in early spring. Grasses take over in mid-spring, with temperatures around 20°C, and their pollen lingers into early fall. Mold spores join in from mid-spring into mid-fall, when damp, warm spells let them thrive. Within each of these periods, warm, dry and windy days push levels higher, while rain clears the air.
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Frequently Asked Questions About Pollen in Eastern Cape
Is pollen high in Port St Johns right now?
On 10 October 2026, overall pollen levels in Port St Johns are moderate. Cypress is the main contributor to airborne pollen, while urtica, artemisia, morus, and myrtle remain at lower levels
Will pollen levels change in Port St Johns tomorrow?
On 11 October 2026, pollen conditions in Port St Johns will be different from today, with cypress at moderate levels, urtica at moderate levels and artemisia, morus, myrtle increasing
Is pollen expected to decrease in Port St Johns this week?
According to the five-day outlook, artemisia, cypress, morus, myrtle, and urtica pollen levels are expected to gradually decrease, while grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Port St Johns?
On 10 October 2026, Cypress is the dominant pollen source in Port St Johns. urtica, artemisia, morus, and myrtle are also present but at lower levels. platanus, grass, and oak are not currently active.
When is pollen season in Port St Johns?
How often is the Port St Johns pollen forecast updated?
The Port St Johns pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Port St Johns 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 Port St Johns 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 Port St Johns, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
