How to Keep Your Dog Cool in Summer (Heatstroke Guide)

Every summer in the UK, dogs are rushed to veterinary clinics with heatstroke. In many cases, it started as an ordinary walk, a short car stop, or a “they seemed fine” moment.

The tricky part is that dogs don’t always show early warning signs clearly, and many will keep running, playing or retrieving long after their body should have stopped.

Knowing how to keep your dog cool in summer isn’t just about comfort. It’s about prevention.

This complete UK summer safety guide covers heatstroke risk, safe walking temperatures, breed vulnerabilities, hydration, home cooling, summer enrichment, and hot-weather car travel.

Quick Answer: Dogs begin to struggle above 20°C, with serious heatstroke risk above 25°C, especially for flat-faced, overweight or high-drive breeds. To keep your dog cool in summer, avoid midday exercise, provide constant fresh water, use cooling mats or damp towels, prioritise enrichment over exertion, and never leave dogs in cars.

Why Dogs Overheat Faster Than Humans

Unlike us, dogs cannot sweat efficiently through their skin. They mainly regulate temperature by panting and releasing small amounts of heat through their paw pads.

Panting works by evaporating moisture from the tongue and airways. When the air is hot or humid, this cooling system becomes less effective, which is why what feels “warm but manageable” to us can become dangerous for them.

Body fat also acts as insulation, meaning overweight dogs retain more heat. If you’re unsure about your dog’s condition, see Is Your Dog the Optimum Weight?.

Many summer emergencies happen during everyday routines rather than extreme weather.

How Hot Is Too Hot for Dogs?

Owners often search: “Is it too hot to walk my dog?” Here’s a practical guide:

• Above 20°C: caution required
• Above 25°C: high risk for many dogs
• High humidity: increases danger further

Always perform the pavement test: place your hand flat on the ground for five seconds. If it’s uncomfortable for you, it’s unsafe for paws.

Cloud cover does not remove risk. Hard surfaces can hold heat long after air temperatures peak.

Working Breeds Often Won’t Stop Themselves

High-drive breeds such as Labradors, Spaniels, Collies and many working-line dogs are especially vulnerable in summer.

They are bred to work through discomfort, so they may continue chasing, retrieving or training long after overheating has begun. Ball throwing and high-arousal recall games are common contributors.

In hot weather, replace intensity with enrichment. A frozen LickiMat or a frozen feeder (for ideas, see Toppl Tricks You’ll Love) can extend cooling time safely while helping your dog settle.

Hydration isn’t just about drinking, it’s also about safe food-based moisture intake.

Dogs Most at Risk in Summer

• Flat-faced breeds (French Bulldogs, Pugs, Bulldogs)
• Double-coated breeds (Huskies, Golden Retrievers)
• Working and high-drive dogs
• Puppies and senior dogs
• Overweight dogs (see optimum weight guide)

None of this is about judgement. It’s about recognising who needs extra support so we can prevent problems before they start.

Signs of Heatstroke in Dogs

• Excessive or frantic panting
• Bright red, pale, or tacky gums
• Thick drooling
• Vomiting or diarrhoea
• Disorientation, wobbling, or weakness
• Collapse

Heatstroke is a medical emergency. Immediate cooling and veterinary advice are essential.

If you’re unsure whether your dog’s symptoms are serious, our full guide on Heat Stroke in Dogs explains early warning signs and when to call your vet.

How to Cool a Dog Down Quickly

Quick Answer: If your dog is too hot, move them to shade immediately, offer small amounts of cool water, apply cool damp towels to their paws and belly, increase airflow, and stop activity. Avoid ice baths. Contact your vet if symptoms do not improve quickly.

If your dog is overheating but still responsive, this is considered first aid for overheating dogs. Act calmly and follow these steps:

• Move your dog into shade or a cool indoor space straight away.
• Offer small amounts of cool (not ice-cold) water.
• Place cool, damp towels on the paws, belly and groin area.
• Increase airflow using a fan or safe ventilation.
• Stop all exercise and stimulation immediately.

A damp microfibre towel works particularly well because it retains cool water against the body without soaking everything.

Do not submerge your dog in ice water. Rapid cooling can cause shock and may worsen heatstroke. Cooling should be gradual and controlled.

If your dog shows signs such as collapse, vomiting, confusion, or panting that does not settle, seek veterinary attention immediately.

Hydration and Summer Support

Hydration is one of the simplest ways to reduce summer risk. Provide fresh water at all times, and bring water on walks and car journeys.

For travel, the Road Refresher Non-Drip Bowl helps prevent spills while still giving your dog access to water.

For longer journeys, warm days, or mild dehydration support, Oralade provides electrolyte support designed specifically for dogs.

Frozen moisture-rich enrichment can also boost fluid intake safely. Try Bone Broth Ice Cubes, a frozen LickiMat, or the Summer Snack Yoggie Pot.

One more practical point: shared public water bowls can spread germs. See Avoid Sharing Water Bowls.

Keeping Your Home Cool for Dogs

Small changes at home make a big difference, especially during heatwaves.

• Provide shaded resting areas and allow access to tiled floors.
• Offer multiple water stations so your dog does not have to choose between comfort and hydration.
• Use a Cooling Mat to help dissipate body heat.
• Use a cool, damp towel to help your dog offload heat after a short walk or play.
• Keep grooming consistent to remove loose undercoat and improve airflow through the coat (see Grooming).

A cooling mat is also a great “settle spot”. If your dog is unsure, scatter a few treats on it while they lie down so it becomes a calm, positive place to relax.

Dogs in Hot Cars and Summer Car Travel Safety

People search “dogs in hot cars UK” for a reason. Car temperatures rise quickly and the risk can build fast, even if it doesn’t feel scorching outside.

For secure travel set-ups, car sickness tips and general travel essentials, see our Dog Car Travel Safety Guide.

Hot-weather car travel checklist:

• Never leave your dog unattended in a parked car. Not “just two minutes”. Not “windows cracked”. If you can’t take them with you, don’t make the trip.
• Cool the car before your dog gets in. Run air conditioning first, then load your dog once the cabin temperature drops.
• Ventilation matters. If your dog travels in the boot, make sure airflow reaches that area, not just the front seats.
• Avoid peak heat. Travel early morning or later evening when possible, and plan direct routes with minimal stops.
• Offer water little and often. A non-spill option like the Road Refresher Non-Drip Bowl helps.
• Support hydration on longer travel days. Oralade can be useful if your dog is panting more than usual.
• Pack a cooling towel. A damp microfibre towel can help cool paws and the underside during breaks.
• Use chilled enrichment for calm. A frozen LickiMat can encourage settling. If you’re transporting frozen enrichment, use an Insulated Lunch Box for LickiMats.
• Avoid heavy meals before travel. It can worsen nausea and adds metabolic heat during digestion. Keep it light until you arrive.

If your dog is panting hard, drooling heavily, seems unsteady, or is not recovering quickly after a stop, treat it as urgent. Start cooling (shade, small amounts of cool water, damp towels on paws and belly) and contact your vet.

Summer doesn’t have to mean stress. With small adjustments, thoughtful planning, and an understanding of how dogs regulate heat, you can keep your dog safe, comfortable and happy all season.

Welfare-led choices matter, especially when temperatures rise.

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