Is It Too Hot to Walk My Dog - Pavement Heat Explained

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The number on your phone is not the number under your dog

Air temperature is measured in shade, a metre and a half above the ground, by an instrument that is not walking barefoot. Your dog is none of those things. Vets Now puts the gap in plain figures: on a day with an air temperature of 25C, asphalt can reach 52C, and at an air temperature of 31C that rises to 62C. It adds the detail that makes those numbers matter, which is that skin destruction can occur in just one minute at 52C (Vets Now, hot surfaces and dogs, read 4 August 2026).

One minute is less time than it takes to cross a supermarket car park with a trolley and a lead in the same hand.

The surface that surprises people is artificial grass. Vets Now cites research in which artificial grass was the hottest surface in all four trials, hotter than running track material, asphalt, brick and concrete, with the three hottest surfaces measuring upwards of 50C at two in the afternoon. Plastic lawn reads as grass to an owner and behaves like a radiator. If your route crosses a fake lawn outside a block of flats, that is the hottest step of the walk, not the safest one.

The seven-second test, and what it actually proves

Both Vets Now and the Kennel Club recommend the same physical check. Vets Now: place the back of your hand on the surface and hold it there for seven seconds, and if you cannot keep it there comfortably, it is too hot to walk your dog. The Kennel Club puts the same test slightly differently, saying that if it is too painful for your hand then it is too painful for your dog’s paws, and adds that pavements are often deceptively hot and will usually be much warmer than the air outside (Royal Kennel Club, hot pavements, read 4 August 2026).

The test is good. It is also narrower than most people use it. Pressing the back of your hand to the ground tells you about one surface, in one spot, in the shade or sun it happens to be in, at the moment you touch it. It tells you nothing about the road you will cross in ten minutes, the south-facing stretch with no trees, the metal drain cover, or the same pavement forty minutes later when the sun has come round the building. Asphalt also holds heat long after the air has started to cool, which is why an evening walk can feel comfortable to you and still be too hot underfoot.

Use the test more than once, and use it where the sun has been longest, not where you happen to be standing.

Heat illness in dogs is mostly not about parked cars

The car is the story everybody knows, and it is not the main one. Research summarised for UK vets found that exertional heat-related illness accounted for 74.2% of heat-related illness events presenting to primary care veterinary practices in the UK in 2016, most of them in spring and summer, and many following activity that was not especially intense (UK Vet Companion Animal, canine heat-related illness, read 4 August 2026).

The figure that should change behaviour is the temperature those events happened at. The same summary reports an average wet bulb globe temperature of 16.5C for exertional heat-related illness events in pet dogs in the UK. That is a mild day. Not a heatwave, not a warning on the news, not a day anyone would describe as dangerous. Dogs are not mainly being harmed by extreme weather. They are being harmed by ordinary weather plus a ball thrower.

Which reframes the question this page is named after. “Is it too hot to walk my dog” is really two questions: is the ground too hot for the paws, and is the combination of heat and exertion too much for the animal. The seven-second test answers only the first.

Which dogs are on the wrong side of the maths

A knowledge summary appraising four studies concluded that dogs that are brachycephalic are likely to have an increased risk of developing heat-related illness compared with non-brachycephalic dogs, and noted that brachycephalic breeds are over-represented in presentations for heatstroke. It rated the strength of that evidence as moderate, and made a point that gets lost when the finding is repeated: other factors named, including body weight, also contributed to the risk, so a flat face does not explain all of the variation (Veterinary Evidence, heatstroke and brachycephalic dogs, read 4 August 2026).

Read that as a stack rather than a single label. A flat-faced dog cools less efficiently because panting is how dogs shed heat and a compressed airway makes panting less effective. Weight adds insulation and adds work. Age matters at both ends. Coat thickness matters. And on top of all of that sits the one factor the owner controls completely, which is how hard the dog is working.

The uncomfortable version of this is that a fit young dog with an owner who throws a ball for twenty minutes may be at more risk on a mild afternoon than an elderly dog lying in the shade on a hot one. Effort is the multiplier.

The heat ladder under your feet

The figures below are the ones Vets Now publishes, laid out so you can see the shape of the problem rather than memorise numbers. What matters is not the exact conversion, which varies with surface, colour, cloud and how long the sun has been on it. What matters is that the gap between air and ground grows as the day gets hotter.

AIR TEMPERATURE      ASPHALT CAN REACH        WHAT THAT MEANS
=================================================================
        25 C                52 C            skin destruction
                                            possible in about
                                            one minute
-----------------------------------------------------------------
        31 C                62 C            well past that point
                                            before you reach the
                                            end of the street
-----------------------------------------------------------------
ARTIFICIAL GRASS     hottest surface tested, above running track,
                     asphalt, brick and concrete; hottest three
                     surfaces above 50 C at 2pm
-----------------------------------------------------------------
Figures published by Vets Now, read 4 August 2026. Treat them as a
shape, not a lookup table: colour, cloud, wind and how long the sun
has been on a surface all move the real number.

Rebuilding the walk instead of cancelling it

Most advice at this point tells you to walk early or late and stops. That is right but incomplete. Vets Now names before 8am and after 8pm as the windows when surface temperatures are no longer as high, and the Kennel Club adds the simplest substitution available, which is to prioritise grass over pavement on hot days.

Beyond timing, the useful changes are about intensity rather than duration. A slow twenty minutes of sniffing along a hedge costs a dog far less heat than ten minutes of fetch, and most dogs find it more satisfying. Shade is not decoration on a hot route, it is the route. Carry water for the dog as a matter of habit rather than as a hot-weather special measure. Plan the return leg before you set off, because dogs overheat on the way home from a walk that felt fine on the way out.

And accept that some days the honest answer is that the walk is not happening. A skipped walk costs a dog nothing. Scent games indoors, a food puzzle, training a new behaviour in a cool room, or five minutes of shaping tricks will tire a dog more thoroughly than a lap of a hot pavement. If your dog is young and the energy has to go somewhere, put it into their nose rather than their legs.

The signs that end the walk immediately

This is a recognition list, not a treatment list. If you see any of it, stop, get the dog out of the heat, and ring your vet or your nearest emergency clinic and tell them what you are seeing. Do not walk on to finish the route, and do not wait to see whether it settles.

Heavy panting that does not slow when the dog stops moving. Panting that changes character, becoming noisy, laboured or accompanied by a change in the sound of the breathing. Drooling more than usual, or drool that has become thick. Unsteadiness, stumbling, a dog that sits or lies down and does not want to get up, or a dog that is suddenly disoriented. Gums that look a different colour from normal. Vomiting or diarrhoea during or after exertion in the heat. Any collapse.

Limping, licking at the paws, refusing to walk on one surface but walking happily on grass, or a dog that suddenly starts hopping between shaded patches, all point at the ground rather than the whole animal. Pad damage is not always visible at first. Both cases end the same way, which is with a phone call rather than an internet search. What to do about heat and the triage helper both exist for the minutes after you make that decision.

We do not publish cooling instructions, temperatures to aim for, or anything to give a dog. Getting that wrong causes real harm, and the sequence a vet wants depends on the dog in front of them.

The thirty-second pre-walk check

Run this at the front door on any day that feels warm, including days that do not feel hot. It takes less time than finding the lead.

Where these facts come from

Every figure above was read on the source named beside it, on 4 August 2026. Surface temperature figures, the artificial grass finding, the seven-second test and the walking windows come from Vets Now. The pavement test wording and the grass-over-pavement advice come from the Royal Kennel Club. The 74.2% exertional figure and the 16.5C wet bulb globe temperature come from UK Vet Companion Animal’s summary of recent research. The brachycephalic risk statement and its limitations come from the knowledge summary published by Veterinary Evidence.

Nothing on this page was written from memory, and where a source stated that its evidence was moderate rather than strong, we have said so rather than rounding it up.

Keep reading: Heat and your pet · Walking your dog · Seasonal hazards · Reading your pet · Water intake · Pet emergency · Before you call the vet · Find an emergency vet · Pet-proof your home