23/06/2026
Hot weather and behaviour: why your dog may seem different in the heat
Most owners know the basics:
- Provide plenty of fresh water
- Offer shade and cool resting areas
- Exercise during the cooler parts of the day
- Never leave dogs in cars
- Be aware of the signs of heat stress
However, hot weather can influence behaviour as well as physical wellbeing.
Like people, dogs vary in how they cope with higher temperatures.
For some dogs, heat and physical discomfort may reduce their tolerance for situations they already find difficult. Dogs experiencing fear, frustration, conflict, or pain may find it harder to cope, meaning behaviours such as growling, snapping, barking, or avoidance may occur more readily than usual. In other words, the threshold at which they respond may be lower.
For other dogs, the opposite may appear to happen. They may seem quieter, calmer, or less reactive. However, this should not automatically be interpreted as an improvement in the underlying issue. In some cases, dogs are simply conserving energy or are less able to respond because of the heat.
Importantly, behaviour and emotion are not the same thing.
A dog that is barking less, reacting less, or appearing more tolerant may still be experiencing the same underlying emotional state as they would on a cooler day. The absence of behaviour does not necessarily mean the absence of fear, frustration, or discomfort.
For dogs with ongoing behavioural difficulties, hot weather should not be viewed as an opportunity to push boundaries or test progress. If your dog normally benefits from management and support, those measures remain just as important, even when they appear to be coping better.
As temperatures rise, remember to consider your dog's emotional wellbeing as well as their physical comfort.