Should You Trim Your Dog's Hair in The Summer?

When the temperatures start climbing, many dog parents wonder whether giving their dog a summer haircut will help them stay cool. It seems like an easy way to beat the heat, but the answer isn't always as simple as reaching for the clippers. In fact, trimming the wrong type of coat can actually make your dog less comfortable and even increase their risk of overheating or sunburn.

Some dogs will benefit from a trim while others shouldn’t be trimmed at all. It really depends on your dog’s coat type, breed, health, and grooming needs.

Does a Dog's Coat Keep Them Warm or Cool?

Many people think a thick coat automatically makes a dog hotter, but that's not entirely true. If a dog has a healthy coat, it can act as natural insulation. While insulation helps keep dogs warm during winter, it also helps slow the transfer of heat to the skin during summer.  A dog’s coat creates a protective barrier that allows air to circulate close to the body while shielding the skin from direct sunlight.

Dogs primarily regulate their body temperature by panting and through small sweat glands in their paw pads. Their coat also plays an important supporting role by protecting them from the sun and helping maintain a stable body temperature.

Should You Trim Your Dog's Hair in the Summer?

In only some cases, the answer is yes, but only if your dog has continuously growing hair or a coat that becomes heavily matted.

Breeds such as Poodles, Shih Tzus, Maltese, Yorkshire Terriers, and Doodles often benefit from regular trims throughout the summer. Their hair grows continuously rather than shedding seasonally, so keeping it trimmed can improve comfort, reduce tangles, and make grooming much easier.

A shorter trim can also help prevent painful mats that trap heat, dirt, and moisture against the skin. Just remember that "short" doesn't mean shaved. Leaving some length helps continue protecting your dog's skin from the sun.

When You Shouldn't Trim Your Dog’s Fur

Many double-coated breeds should never be shaved or trimmed just because it's hot outside.

Dogs such as Golden Retrievers, Labrador Retrievers, German Shepherds, Siberian Huskies, Australian Shepherds, Border Collies, Bernese Mountain Dogs, and many mixed breeds have a double coat made up of a soft insulating undercoat and a protective outer layer of guard hairs.

By cutting your dog’s fur, it removes both layers and interferes with the coat's natural ability to regulate temperature. Without that protective barrier, these dogs are more vulnerable to overheating, sunburn, insect bites, and skin irritation. In some cases, the coat may also grow back unevenly or fail to regain its original texture.

For these breeds, regular brushing is far more beneficial than trimming because it removes loose undercoat while allowing the outer coat to continue doing its job.

How Do You Know if Your Dog Has a Double Coat?

Sometimes it's obvious, but not always. Double-coated dogs typically shed heavily once or twice a year and have a soft, dense undercoat beneath a coarser outer coat.

If you're unsure what type of coat your dog has, ask your veterinarian or a professional groomer before scheduling a summer hair trim. A quick consultation can help prevent a grooming mistake that could affect your dog's comfort for months.

What About Long-Haired Dogs?

Not every long-haired dog will benefit from a dramatic summer haircut. Long-haired breeds that have continuously growing coats can often be trimmed into a manageable style that keeps them comfortable without exposing too much skin.

For double-coated long-haired breeds, however, regular brushing out their loose undercoat is usually the safest approach. A professional groomer can often trim the coat around the feet, sanitary areas, and ears without removing the coat's natural protection.

Does Trimming Help Prevent Overheating?

A proper trim may help some dogs feel more comfortable, but it isn't the most important factor in preventing heat-related illness.

The biggest risks for overheating come from hot pavement, high humidity, lack of shade, poor ventilation, and excessive exercise during the hottest part of the day. Even dogs with short coats can suffer from heat exhaustion if they're outside too long.

The best way to keep your dog cool is by providing plenty of fresh water, shade, air conditioning when possible, and limiting walks to the early morning or evening when temperatures are lower.

What If Your Dog Has Matted Fur?

Matted fur changes the equation. If your dog has severe mats, it can trap heat close to the skin, restrict airflow, pull painfully on the skin, and create an ideal place for moisture and bacteria. In these cases, shaving may actually be the most humane option because the mats cannot be brushed out safely.

Once the coat grows back, regular brushing and routine grooming appointments can help prevent mats from returning.

Summer Grooming Tips for Every Dog

Whether your dog gets a haircut or not, consistent grooming is one of the best ways to help them stay comfortable during warm weather. Regular brushing removes loose hair, improves air circulation through the coat, and reduces shedding around the house.

Bathing with a gentle dog shampoo can help keep your dog’s skin healthy, while checking the ears, paws, and skin after outdoor adventures allows you to spot ticks, foxtails, or minor skin irritations before they become bigger problems.

If your dog spends time outdoors, it's also a good idea to keep the fur around their paw pads neatly trimmed. This can help prevent debris from getting trapped and make it easier to spot cuts or burns from hot pavement.

Final Thoughts

For dogs with continuously growing hair, a regular trimming can improve comfort and make grooming much easier. For double-coated breeds, however, trimming or shaving usually does more harm than good by removing the coat's natural protection against heat and the sun.

If you’re unsure whether a trim’s right for your dog,  your veterinarian or an experienced professional groomer can help you decide what's best for your dog's specific coat type. With the right grooming routine, plenty of shade, fresh water, and common-sense heat precautions, your dog can stay comfortable and safe all summer long even without a haircut!