Stray cats, neighborhood cats, or your own cat who spends its nights outdoors: winter is a risky time for all cats living outside. A well-designed outdoor cat shelter that is dry, insulated, and sheltered from the wind can make a real difference. The good news: it doesn't require a large budget or any special skills. Here is how to choose, build, and install a cat house or shelter suitable for winter.
Why a shelter is essential in winter
Cold alone is not the main danger: it is the combination of cold, moisture, and wind. A wet cat loses its body heat very quickly. Without a dry place to take refuge, it is exposed to hypothermia and frostbite, particularly in its ears, tail, and paws. Kittens, older cats, thin cats, or sick cats are the most vulnerable.
A good winter cat shelter provides:
- protection from the wind, rain, and snow;
- insulation that retains the heat the cat produces itself;
- a dry floor, insulated from the cold and damp ground;
- a discreet place where it feels safe.
The features of a good outdoor cat shelter
A compact size
The most common mistake is building one that is too large. An effective shelter is just spacious enough for the cat to turn around: this allows it to warm the air inside with its own body heat. Guidelines for one or two cats:
- width and depth: about 40 to 50 cm;
- height: about 35 to 40 cm;
- opening: about 15 cm in diameter, large enough for a cat, but too small for most dogs.
Good insulation
- double or insulated walls (polystyrene, insulation panels);
- a floor raised by at least 10 cm to prevent contact with the cold and damp ground;
- a waterproof roof, slightly sloped so that water drains off;
- straw inside.
Straw, and definitely no blankets
This is the most important point. Blankets, towels, and fabric cushions absorb moisture and then freeze or stay wet: they cool the cat down instead of warming it up. Straw, on the other hand, stays dry, and the cat can make a nest in it. Be careful not to confuse it with hay, which retains moisture and molds.
Where to install the cat house
- Position the opening away from the prevailing wind, or protect it with a small flexible flap.
- Against a wall, under an awning, or in a garden shed for extra protection from the rain.
- Elevated on a pallet or concrete blocks, to keep it above snow and puddles.
- In a quiet and discreet place, away from busy areas, dogs, and the road.
- Not too far from the feeding area, but do not put the bowl inside: food attracts other animals, and spilled water will soak the straw.
Building a winter cat shelter yourself
The cooler shelter (emergency solution)
- Take a 40- to 50-liter polystyrene cooler.
- Cut an opening about 15 cm wide on the side, a few centimeters from the back, so the straw does not fall out.
- Fill the bottom with straw.
- Secure the lid and protect the whole thing with a tarp or a thick garbage bag.
This will cost about twenty euros. It is a quick solution, but not very durable.
The double plastic tub shelter (durable solution)
- Take two storage tubs of different sizes, one fitting inside the other with about 5 cm to spare.
- Line the bottom and sides of the space between the two tubs with polystyrene sheets.
- Cut the entrance through both tubs, aligning them.
- Fill the inner tub with straw and put the lids on.
This will cost between 30 and 40 € and provide a shelter that will last for several winters. For other step-by-step models, see our guide to building a cat shelter.
Buying an outdoor cat house or shelter
If you prefer to buy one, choose a model designed for outdoor use: waterproof material (thick plastic, treated wood), insulation, an elevated floor, and a small entrance. Fabric or wool houses designed for indoor use will not withstand the rain. To compare models, read our cat shelter buying guide.
Our felted wool caves are designed for indoor use. They may also be suitable in a fully covered and dry outdoor space, such as a veranda, garage, or garden shed, but never exposed to rain or snow.
Heated shelters: useful, but use with caution
In most regions of France, a well-insulated shelter filled with straw is sufficient. If temperatures frequently drop well below freezing, you can add:
- a self-warming thermal pad, which reflects the cat's heat without electricity;
- a low-energy heating mat designed for animals and outdoor use, with a bite-resistant cable.
Never use a light bulb, indoor heater, or household heated blanket: the risk of fire and electrocution is real.
Several cats? Several shelters
For a colony of cats, provide several small shelters close together rather than one large one: they will stay warmer, and each cat can choose its own space. A slightly larger shelter with two entrances can accommodate two cats that get along well. A covered feeding area, separate from the shelters, allows you to feed them in dry conditions.
Water and food in winter
- Outdoor cats need more energy when it is cold: regular feeding helps them maintain their body temperature.
- Water freezes quickly: change it often, and use a thick bowl or a heated bowl designed for outdoor use.
- A small awning over the bowls protects them from rain and snow.
Maintaining the shelter
- Every week: check that the entrance is not blocked by snow and that the straw is dry.
- Every two to four weeks: change the straw, more often if it is damp or soiled.
- After bad weather: check the tightness of the roof and the stability of the shelter.
How to tell if a cat is using the shelter
- the straw is packed into a nest shape;
- there are hairs or paw prints inside;
- snow or mud is trampled in front of the entrance;
- the cat stays nearby at mealtimes.
Some cats take several days to get used to a new shelter. Do not move it too quickly.
Helping stray cats beyond providing a shelter
Before installing a shelter on land that is not yours, ask the owner or homeowners' association for permission and inform your neighbors. Contact your local town hall and local animal welfare organizations: many run programs to sterilize and identify free-roaming cats, which is the best way to reduce the number of cats suffering outdoors. If a cat appears sick, injured, or very thin, contact an organization or a veterinarian.
Frequently asked questions
What is the best bedding for a cat shelter in winter?
Straw. It stays dry and provides insulation, unlike blankets and hay.
Should an outdoor cat house be heated?
Generally no: a small, insulated shelter filled with straw is sufficient. Heating is only useful in very cold regions, and only with equipment designed for outdoor use.
My own cat goes outside at night in winter. What should I do?
The safest thing is to let it come inside, for example with a cat flap. To recognize a cat that is cold and warm it up, read my cat is cold at night: 9 effective solutions.
In summary
An effective winter cat shelter is small, insulated, elevated, filled with straw, and positioned away from the wind. Even the simplest solution, as long as it stays dry, can help a cat get through a freezing night. It is better to start modestly, but to start early: the first truly cold nights arrive quickly.
