Winter Cockroaches: Why They’re Still Crawling Around Your Home

As the temperature drops, most of us expect the usual household pests to quieten down. So it’s easy to assume cockroaches take the winter off too. Unfortunately, that’s one of the most persistent myths in pest control, and it’s exactly why so many homes still end up needing cockroach control in the middle of winter.

The reality is that cockroaches don’t disappear when it gets cold, they simply move somewhere warmer: inside your home. If you’ve spotted one scuttling across the kitchen floor at night or found droppings behind the fridge in July, you’re not imagining it. Cockroaches in winter are common, and left unchecked, a small problem can quickly turn into a full cockroach infestation.

Do Cockroaches Really Stay Active in Winter?

Cockroaches are cold-blooded, which means they can’t regulate their own body temperature. When it’s cold outdoors, they don’t die off in large numbers, instead, they seek out warm, sheltered environments where they can keep feeding and breeding. Your home, with its heating, running water and steady food supply, is the perfect refuge.

Rather than slowing down, many cockroaches simply relocate indoors and become harder to detect. Because they’re nocturnal and skilled at hiding, you may not realise how many are sharing your home until the population has grown. This is why cockroaches in winter often go unnoticed until an infestation is well established.

Why Warm, Damp Rooms Are Cockroach Magnets

Cockroaches are drawn to three things above all else: warmth, moisture and food. In winter, the rooms that tick every box are the ones we use most, the kitchen, bathroom and laundry. These spaces stay humid, hold residual heat from appliances, and offer easy access to crumbs, grease and water.

The kitchen is usually the biggest drawcard. Warmth radiating from the back of the fridge, dishwasher and oven creates cosy harbourage, while food debris and grease keep cockroaches well fed. Bathrooms and laundries add the moisture cockroaches crave, thanks to leaking taps, condensation and damp towels. Combine heating with reduced ventilation over winter and you’ve created ideal conditions for cockroaches to thrive.

Where Cockroaches Hide During Winter

Cockroaches are experts at squeezing into tight, dark spaces close to heat and water. During the colder months, the most common hiding spots include:

• Under and behind kitchen appliances: The motors of fridges, dishwashers and ovens give off constant warmth.
• Cracks, crevices and wall cavities: Gaps around cupboard hinges, kickboards, tiles and pipe penetrations make ideal shelter.
• Beneath sinks and around plumbing: Kitchen, bathroom and laundry sinks offer the moisture cockroaches depend on.
• Subfloors, roof voids and storage areas: Cluttered spaces full of cardboard and paper provide both food and hiding places.
• Around hot water systems and heaters: Any reliable heat source becomes prime real estate in winter.

If you’d like to know more about the species most likely to move in, our cockroach control guide explains how to identify German, Australian and American cockroaches and the signs of activity to watch for.

Signs You Might Have a Cockroach Infestation

Cockroaches are good at staying out of sight, so it pays to know the warning signs. You may have a cockroach infestation if you notice:

• Small, dark droppings resembling coffee grounds or pepper along skirting boards and inside cupboards
• A musty, oily odour in kitchens, bathrooms or other damp areas
• Shed skins, egg cases or the occasional carcass in corners and behind appliances
• Live cockroaches during the day, which often signals overcrowding and a larger hidden population
• Smear marks in humid areas where cockroaches travel repeatedly

Spotting even one of these signs in winter is worth taking seriously. Cockroaches breed quickly, so acting early makes cockroach treatment far simpler and more effective.

Simple Hygiene and Maintenance Tips to Deter Cockroaches

Good housekeeping won’t cure an established problem, but it makes your home far less inviting and helps prevent cockroaches from settling in. A few practical habits go a long way over winter:

• Clean up food and grease: Wipe benches and stovetops daily, sweep floors, and clean behind and under appliances regularly.
• Store food securely: Keep pantry items in sealed containers and take out the rubbish often.
• Fix moisture problems: Repair leaking taps and pipes, and dry out sinks, showers and laundry areas.
• Improve ventilation: Use exhaust fans and air out humid rooms to reduce the damp cockroaches love.
• Reduce clutter: Clear away cardboard, paper and stored items that provide shelter and food.
• Seal entry points: Fill gaps and cracks around pipes, skirting boards, windows and doors.

These steps form the foundation of good home pest control and work best alongside professional treatment when cockroaches have already taken hold.

When DIY Isn’t Enough

Supermarket sprays, baits and foggers can knock back the cockroaches you can see, but they rarely reach the nests, eggs and hidden harbourages where the real problem lives, especially with fast-breeding German cockroaches. That’s why DIY methods so often deliver short-term relief followed by the same cockroaches returning weeks later.

Cockroaches are hardy, and an established infestation usually needs a targeted, professional approach to eliminate at the source. If you’ve tried DIY cockroach control without lasting success, it’s a strong sign the population is bigger, and better hidden, than it appears.

Why Professional Cockroach Treatment Works Best

A professional cockroach treatment begins with a thorough inspection to identify the species, gauge the level of activity and locate key hiding and entry points. From there, our technicians apply a tailored combination of low-odour residual sprays, insecticidal dusts and gel baits, focusing on the cracks, voids and warm appliance motors where cockroaches live and breed.

An expert exterminator treatment targets the source rather than just the visible pests, which is what makes it so much more effective than a can of spray. For heavier infestations, follow-up visits monitor progress and re-treat high-risk zones, and your technician will share hygiene and proofing advice to help stop cockroaches coming back. With more than 60 years of experience, our licensed technicians deliver safe, reliable results for your home and family.

Why Professional Cockroach Treatment Works Best

A professional cockroach treatment begins with a thorough inspection to identify the species, gauge the level of activity and locate key hiding and entry points. From there, our technicians apply a tailored combination of low-odour residual sprays, insecticidal dusts and gel baits, focusing on the cracks, voids and warm appliance motors where cockroaches live and breed.

An expert exterminator treatment targets the source rather than just the visible pests, which is what makes it so much more effective than a can of spray. For heavier infestations, follow-up visits monitor progress and re-treat high-risk zones, and your technician will share hygiene and proofing advice to help stop cockroaches coming back. With more than 60 years of experience, our licensed technicians deliver safe, reliable results for your home and family.