Adelaide Mold Forecast - Today, Tomorrow and the Week Ahead
Mold Today
Today (7 October) mold in Adelaide is moderate; cladosporium is moderate; alternaria is low.
Mold Tomorrow
Tomorrow (8 October 2026) levels are similar to today.
7-Day Trend
Over the next week alternaria and cladosporium will decrease.
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Mold Risk
Today - 7 October
| Mold species | Level | Value |
|---|---|---|
| Alternaria | Low | 16/100 |
| Cladosporium | Moderate | 26/100 |
Tomorrow - 8 October
| Mold species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alternaria | Low | 25/100 | Decreasing |
| Cladosporium | Moderate | 32/100 | Decreasing |
Local Mold Conditions
Mold has a moderate supply of organic matter around the heart of Adelaide, chiefly in the green spaces among the buildings. In the built-up parts, organic material is more scattered: garden waste, compost, mulch, lawn clippings and leaves from street trees. Compost bins, leaf piles and mulched borders near houses are further local sources.
Cladosporium, the most common outdoor mold, grows on garden waste and fallen leaves through most of the year, peaking in November when temperatures average about 17°C. Alternaria needs more warmth and is most abundant in January. The lowest levels come around July, when the average drops to about 10°C. Day to day, spores peak on dry, breezy afternoons after dew or light rain.
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Resource Hub
Sports venues in Adelaide 4 sports venues
Local parkruns 45 parkruns
Local events 7 events
Frequently Asked Questions About Mold in South Australia
Why do I still have allergy symptoms after the pollen season?
Allergy symptoms after the main pollen season may be caused by mold spores. Outdoor mold levels can remain high into late summer and autumn, when pollen levels are already falling. Mold allergy can cause symptoms similar to pollen allergy, including sneezing, a runny or blocked nose, itchy eyes, coughing, and wheezing.
What are mold spores and why do they cause allergies?
Mold spores are tiny particles released by fungi into the air. When inhaled, they can trigger an allergic reaction in sensitive people. Common symptoms include sneezing, a runny or blocked nose, itchy or watery eyes, coughing, and wheezing.
When are mold spore levels highest?
Outdoor mold spore levels often increase during warm and humid conditions, particularly when there is plenty of decaying vegetation. Levels can vary considerably with weather, season, vegetation, and location, and some types of mold are more common during particular times of the year, e.g. in the Fall.
How can I reduce my exposure to mold spores?
If you are sensitive to mold, check local mold spore levels and forecasts before spending long periods outdoors. On high-risk days, reducing time around dense vegetation, compost, fallen leaves, and other sources of decaying plant material may help limit exposure.
Understanding the Scale
The 0–100 mold scores represent risk levels, not direct mold measurements. Higher scores indicate higher risk.
Mold
| 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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