If you've ever stood by the door with the lead in your hand and wondered, "Is it too hot to walk my dog?", you're not alone. It's one of the most common questions dog owners ask during spring and summer in the UK.
The truth is that there isn't a single magic number that is safe for every dog. Temperature matters, but so do humidity, direct sun, hot pavements, your dog's breed, age, fitness, and whether they have any breathing or health issues.
Once the weather starts getting above 20°C, it is time to slow down and be much more cautious, especially for higher-risk dogs.
Some dogs can struggle well before the day feels "very hot" to us, especially flat-faced breeds, older dogs, overweight dogs, puppies, and dogs with underlying health conditions.
Why hot weather can be dangerous for dogs
Dogs do not cool themselves the same way humans do. They mainly rely on panting, which means they can overheat much faster on warm walks, especially if they are exercising, walking on hot ground, or stuck in still, humid air.
That's why it's best to think about risk rather than just temperature. A short shaded walk at a cooler time may be fine for one dog, while a longer pavement walk in the middle of the day could be dangerous for another.
Signs it may be too hot for a walk
It may be safer to skip the walk if:
- the sun is strong and there is little shade
- pavements feel hot to your hand
- your dog is brachycephalic (flat-faced), elderly, very young, overweight, or unwell
- the air feels muggy or still
- your dog is due a long or high-energy walk rather than a quick toilet break
On hotter days, it is often better to swap a full walk for shorter toilet trips, indoor enrichment, training games, or a gentle outing later in the day.
What to do instead
If you are unsure, choose the safer option. Walk earlier, walk later, shorten the route, stick to grass or shaded ground, and bring water. There is no harm in missing one walk if conditions are not right.
You can also read our guide on the best time to walk your dog in summer, check how hot pavement can be for dogs, and learn the warning signs of heatstroke in dogs.