If your cat is not drinking water in summer, the most likely reasons are that cats have a naturally low thirst drive, they instinctively prefer running or fresh water over a still bowl, and their water needs can shift in hot weather in ways that a basic bowl setup does not always meet. The good news is that small, simple changes to how you offer water — and what you feed — can make a real difference.
Why Cats Have Such a Low Thirst Drive in the First Place
Cats evolved in arid environments. Their desert-dwelling ancestors got most of their moisture from prey rather than from drinking standing water. This means cats are biologically wired to extract hydration from food rather than a bowl. A cat eating dry kibble all day needs to drink significantly more water than their instincts actually push them to — which creates a chronic, low-grade dehydration risk that gets worse in summer heat.
This is not laziness or stubbornness on your cat's part. It is simply how they are built. Understanding this makes it much easier to solve the problem.
Common Reasons Your Cat Is Not Drinking Water in Summer
- The water is warm. A bowl left in a sunny kitchen or near a window heats up quickly. Cats are remarkably sensitive to water temperature and will often refuse anything that is not cool and fresh.
- The bowl is near their food or litter tray. Cats naturally avoid drinking close to where they eat or eliminate. In the wild, a water source near a carcass would signal contamination. Placing the bowl in a separate, quieter spot often helps immediately.
- The bowl is too small or too deep. Cats dislike their whiskers touching the sides of a bowl (whisker fatigue is real). A wide, shallow dish is far more inviting.
- The water is stale. Even if a bowl looks clean, cats can detect trace smells from tap chlorine or sitting water. Fresh, filtered water changed at least once or twice a day is more appealing.
- They are simply not thirsty yet — but are getting dehydrated. Because their thirst reflex is blunted, cats can become mildly dehydrated before they feel the urge to drink. Summer heat accelerates this.
How to Tell If Your Cat Is Actually Dehydrated
A quick skin-tent test is a useful first check: gently pinch the skin at the back of your cat's neck and release it. In a well-hydrated cat it springs back immediately. If it returns slowly or holds a ridge shape, your cat may be dehydrated and a vet visit is a good idea. Other signs to watch for include sunken eyes, a dry or tacky mouth, lethargy and reduced urination. If you notice any of these, do not wait — speak to your vet the same day.
Practical Ways to Get Your Cat Drinking More in Summer
Switch to (or add) wet food
Wet cat food is typically 70–80% moisture. Simply replacing one dry meal a day with a wet or raw option is often the single most effective change you can make. Many cats who barely touch a water bowl will stay perfectly hydrated on a wet food diet because they are meeting their fluid needs at mealtimes.
Try a cat water fountain
Running water triggers a cat's instinct that the source is fresh and safe. A simple recirculating fountain is widely reported to double or triple water intake in cats who previously ignored a bowl. They are inexpensive, easy to clean and genuinely worth trying before more complicated interventions.
Place multiple water points around the home
Put a bowl in two or three different rooms, away from food and litter. Some cats will drink from one spot but not another for no obvious reason. More options simply increases the chances they will drink.
Add a little flavour to the water
A small amount of low-sodium tuna water, cooled chicken broth (check it contains no onion or garlic) or the natural liquid from a tin of fish can encourage a reluctant drinker. If you are already giving your cat fish treats, the natural oils and moisture they provide also contribute to overall hydration. Our dried sardines for pets are a single-ingredient, preservative-free option that cats tend to go absolutely wild for — and the natural fish oils support coat and skin health at the same time.
Keep water cool
Drop a couple of ice cubes into the bowl on hot days, or keep a second bowl in the fridge and rotate them. Positioning bowls away from direct sunlight and air vents also helps maintain a cooler temperature for longer.
When to Call the Vet
If your cat has gone more than 24 hours without drinking, appears lethargic, is vomiting or has not used the litter tray, these are signs that require professional attention — not a bowl swap. Summer dehydration in cats can escalate to kidney strain and urinary blockages, both of which are serious. Trust your instincts: if something feels off, call your vet.
Most cats who are reluctant to drink in summer simply need a cooler, fresher, better-positioned water source and a little more moisture in their meals. Start with those changes today and you will likely see an improvement within a few days. If you found this helpful, explore our range of natural, single-ingredient treats at Puprazy — real food your pet will love, with nothing they do not need.
Frequently asked questions
Why is my cat not drinking water in summer even when it's hot?
Cats evolved from desert animals and have a naturally weak thirst reflex. In summer, warm or stale bowl water, a poorly placed bowl or an all-dry-food diet can all reduce intake further. Adding wet food, a water fountain and fresh cool water usually resolves it quickly.
How much water should a cat drink per day in summer?
A rough guideline is about 50–60 ml of water per kilogram of body weight daily. A 4 kg cat needs roughly 200–240 ml. Cats on wet food get much of this from meals, so total intake from a bowl alone will look lower — that is normal as long as the cat is healthy.
Is it dangerous if my cat refuses to drink water in the heat?
Yes, it can be. Dehydration in cats can lead to kidney stress and urinary tract problems, both of which are more common in summer. If your cat has not drunk anything for over 24 hours and seems lethargic or is not urinating, contact your vet the same day.
Do cat water fountains actually help?
For most cats, yes. Moving water mimics a natural, fresh water source and triggers cats' instinct to drink. Many owners report a noticeable increase in water intake within the first week of switching from a static bowl to a recirculating fountain.
Can fish treats help with cat hydration?
Fish treats are not a substitute for water, but natural fish snacks provide moisture and beneficial oils that support overall health. They also make a useful way to add flavour to water — a small drop of fish liquid can encourage a reluctant drinker to approach the bowl.