Townsville residents are no strangers to humidity, tropical rains, and warm temperatures. But 2025 has brought a new level of climate unpredictability to North Queensland. With warmer nights, intense rainfall pockets, higher humidity averages, and extended wet periods, conditions have become ideal for mould growth in homes across the region. As summer approaches, mould prevention has become more urgent than ever for homeowners, tenants, and property managers.
Mould isn’t just an eyesore—it can spread quickly, damage walls and ceilings, trigger health issues, and even affect the outcome of rental inspections. Understanding why mould risks are rising in 2025 and how to prevent outbreaks early can save Townsville homes from costly repairs and unnecessary stress.
Why Mould Risks Are Increasing in Townsville in 2025
1. Higher Humidity Levels
Climate data from 2025 shows that Townsville is experiencing more days with humidity above 75%. Mould thrives in warm, moist air, and higher humidity provides the perfect breeding ground—especially in bathrooms, kitchens, bedrooms, and poorly ventilated areas.
2. Longer Wet Seasons
Unpredictable rainfall patterns have shifted the wet season, causing more frequent rain events and short bursts of heavy showers. Damp outdoor conditions seep indoors through:
- window frames
- poorly sealed doors
- roof leaks
- concrete slabs
- ventilation openings
Constant moisture means surfaces never fully dry, encouraging mould colonies to flourish.
3. Warmer Average Temperatures
Warm air holds more moisture, which increases indoor condensation. In 2025, temperatures have been consistently higher, especially overnight. This creates ideal mould-forming environments in:
- wardrobes
- behind furniture
- linen cupboards
- closed storage areas
4. Extreme Weather and Flooding
The spike in storm activity this year—not necessarily cyclones, but fast-moving intense storms—has increased water ingress issues. Minor roof leaks, damp carpets, and water pooling under homes have caused mould outbreaks in unexpected places.
5. Increased Use of Air Conditioning
With hotter temperatures in 2025, Townsville households have used air conditioning far more frequently. While ACs keep rooms cool, when not cleaned regularly they can circulate moisture and mould spores through vents, creating silent mould issues in ducts, filters, and surrounding walls.
Common Areas Where Mould is Appearing More Often in 2025
- Bathrooms and showers
- Behind fridges and washing machines
- Inside air-conditioning units and filters
- On ceilings, especially near corners
- Bedroom wardrobes
- Window frames and tracks
- Carpets, rugs, and underlay
- Laundry walls and benchtops
Knowing where mould is most likely to grow is key to stopping it early.
How to Prevent Mould Before Townsville’s Summer Arrives
1. Improve Indoor Ventilation
Open windows and doors whenever the weather allows. Increasing air circulation reduces condensation and moisture build-up. For high-humidity rooms, use:
- exhaust fans
- standing fans
- dehumidifiers
Ventilation is your strongest mould prevention tool.
2. Keep Surfaces Dry
Moisture left on surfaces gives mould a starting point. Make drying a habit:
- wipe down showers and bathroom tiles after use
- dry kitchen sinks and benchtops
- clean up spills immediately
- open wardrobes when possible to improve airflow
3. Clean Air Conditioning Filters Regularly
Dirty AC filters trap moisture and mould spores. Before summer:
- wash filters thoroughly
- clean vents and grills
- check drainage lines
- schedule a professional AC clean if needed
A clean air-conditioning system improves air quality and prevents hidden mould growth.
4. Deep Clean Bathrooms and Wet Areas
Use mould-preventing cleaning methods, such as:
- scrubbing grout lines
- applying anti-mould spray on tiles
- cleaning behind toilets and under vanities
- wiping exhaust fan covers
A deep spring clean can drastically reduce mould risk before humidity increases.
5. Check for Leaks and Dampness
Inspect areas where moisture can enter the home:
- roof and gutters
- window seals
- plumbing fixtures
- outdoor drainage
- garden areas that slope toward the house
Fixing minor leaks now can prevent major mould outbreaks during summer storms.
6. Use Natural Mould Prevention Solutions
For regular maintenance, keep surfaces mould-free with:
- white vinegar
- tea tree oil spray
- baking soda paste
- clove oil solutions (a powerful mould inhibitor)
These natural cleaners are effective and safe for families and pets.
7. Reduce Indoor Clutter
Clutter traps moisture and blocks airflow, especially in:
- wardrobes
- under beds
- corners
- linen cupboards
Decluttering before summer helps air move freely through the home, reducing mould growth.
When to Call a Professional
If mould covers more than one square metre, keeps returning, or appears in ceilings, carpets, or air-conditioning systems, it’s time to call a professional cleaning team. Severe outbreaks require specialised treatment to prevent future regrowth.
Professional cleaners in Townsville can also help with pre-summer deep cleaning, moisture treatment, and mould-prevention strategies tailored to the region’s unique climate.
Conclusion
2025’s unpredictable climate patterns have made mould a growing issue for Townsville homes. Increased humidity, heat, and rainfall mean households must take proactive steps now to prevent outbreaks before summer arrives. With smart maintenance, improved ventilation, and regular cleaning, you can keep your property healthy, safe, and mould-free—no matter what the weather brings.
