How much water does your dog or cat need in the summer?

Warm summer days cause dogs and cats to lose more fluid than usual. Therefore, drinking enough is essential to prevent dehydration and keep your pet healthy, energetic, and comfortable.

In this article, you will discover how much water your dog or cat needs on average, how to recognize the first signs of dehydration, and what simple tips help ensure your loyal friend drinks enough during warm days.

In this article

How much water does your dog or cat need in the summer?

📅 Last updated: July 11, 2026 ⏱️ Reading time: 5 minutes

Intro

Drinking enough is one of the most important conditions for keeping your dog or cat healthy during hot summer days. When the temperature rises, the body loses more fluid and the need for water increases. If your pet does not get enough fluids, dehydration can occur, with potential health consequences.

In this article, you will discover how much water your dog or cat needs on average, which factors influence their water needs, how to recognize dehydration, and with what simple tips you can encourage your loyal friend to drink enough.

1. 💧 Why drinking enough is so important

Water plays an indispensable role in your dog's or cat's body. It helps regulate body temperature, supports organs, transports nutrients, and contributes to healthy digestion. Especially during warm summer days, sufficient hydration is essential for the body to function properly.

When your pet drinks too little, fluid loss can increase faster than it is replenished. This increases the risk of dehydration. In severe cases, dehydration can lead to reduced organ function, overheating, and other health problems.

Not every pet has the same water requirements. Factors such as outdoor temperature, age, size, activity, diet, and health all play a role. Therefore, it's important not only to observe how much your dog or cat drinks but also whether their behavior changes during warm days.

🌡️ During warm summer days, the need for water increases

On warm days, your pet loses more fluid through panting and evaporation. Playing, walking, or traveling also further increase the need for water. Therefore, always ensure that plenty of fresh drinking water is available, both at home and on the go.

💡 Pawlio fact

A dog's or cat's body consists of approximately 60 to 70% water. Even a small fluid loss can affect energy levels, body temperature, and overall well-being.

2. 🥣 How much water does your dog or cat need?

There is no fixed amount of water that applies to every pet. The daily water requirement depends on various factors, such as the size of your dog or cat, the outdoor temperature, activity level, age, and type of food.

As a general guideline, dogs and cats need an average of 50 to 70 ml of water per kilogram of body weight per day. During warm summer days, with intensive exercise or illness, this need can increase significantly.

🥣 Food also plays an important role

Not only the temperature, but also the type of food influences how much your pet drinks.

  • Dry kibble contains little moisture, so dogs and cats generally need to drink more.
  • Wet food contains much more water, so a part of the daily fluid requirement is already met through the food.

This does not mean that animals on wet food need less attention to their water intake. There should always be plenty of fresh drinking water available.

💡 Pawlio fact

Cats naturally often drink small amounts throughout the day. Therefore, it can help to place a water bowl in multiple places in the house or to use a drinking fountain.


* The amounts below are average guideline values. The actual water requirement varies per animal and may be higher in hot weather, with a lot of exercise, illness, pregnancy, or a diet that contains little moisture.

Pet Average water requirement*
🐱 Cat (4 kg) ± 200 – 280 ml
🐶 Small dog (5 kg) ± 250 – 350 ml
🐶 Medium-sized dog (10 kg) ± 500 – 700 ml
🐶 Large dog (20 kg) approx. 1.0 – 1.4 litres
🐶 Very large dog (30 kg) ± 1.5 – 2.1 liters

3. 🚨 How do you recognize dehydration?

Dehydration occurs when your dog or cat loses more fluids than their body can replenish. During warm summer days, this can happen faster than many pet owners realize. By recognizing the first signs in time, you can help prevent serious health problems.

Symptoms can develop gradually and vary per animal. Therefore, pay attention not only to how much your pet drinks, but also to changes in behavior and appearance.

🚩 Common signs of dehydration

Particularly look out for these warning signs:

  • 🥵 Excessive panting (especially in dogs)
  • 👅 Dry or sticky mouth and gums
  • 💧 Less or darker urine
  • 😴 Lethargic or sluggish behavior
  • 🍽️ Decreased appetite
  • 👀 Sunken or dull eyes
  • 🐾 Reduced skin elasticity

If you see several of these signs simultaneously, immediately take your pet to a cool place, offer fresh drinking water, and contact your vet if in doubt.

🖐️ The skin turgor test

A simple way to get a first impression of hydration is the skin turgor test.

Gently pinch a small piece of skin between your dog's or cat's shoulder blades and then release it.

  • ✅ Does the skin immediately spring back? Then the fluid balance is likely in order.
  • ⚠️ Does the skin stay up for a moment or spring back slowly? This could indicate dehydration.

Please note: the skin turgor test is merely a tool and not a definitive diagnosis. In young animals, older pets, or certain breeds, this test may be less reliable.

💡 Pawlio fact

Cats often only show signs of feeling unwell late. Therefore, pay extra close attention to subtle changes in their drinking behavior, activity, and appetite during warm days.

4. 💡 How to encourage your pet to drink more

Not every dog or cat drinks enough water naturally, especially during hot summer days. Fortunately, there are several simple ways to encourage your pet to drink more water.

✅ Practical tips

💧 Change drinking water several times a day

Fresh and cool water is more appealing than water that has been in the bowl for hours. Therefore, change the water regularly, especially on warm days.

🥣 Place multiple water bowls

Provide water bowls in several places around the house or garden. This ensures fresh water is always within reach, encouraging your pet to take a sip more often.

🚰 Consider a drinking fountain

Some dogs, and especially many cats, prefer running water over still water. A drinking fountain can therefore help your pet drink more naturally.

🧊 Add some extra cooling

On very hot days, you can add a few ice cubes to the drinking water. Some dogs love this, and it helps keep the water fresh longer.

Use ice cubes sparingly and ensure your pet drinks calmly. Ice-cold water is not necessary; cool and fresh water is the best choice.

🥩 Consider their diet

Wet food contains a lot of moisture and can contribute to daily fluid intake. Do you mainly feed dry kibble? Then pay extra close attention to whether your pet is drinking enough.

🚶 Don't forget drinking water on the go

Are you going for a walk, to the beach, or on holiday? Always bring plenty of fresh drinking water and regularly offer your dog or cat the opportunity to drink.

✅ Small habits make a big difference

Often, it's the small daily adjustments that ensure your pet gets enough fluids. By regularly offering fresh water and making drinking easily accessible, you help prevent dehydration.

💡 Pawlio fact

Cats often prefer to drink from a wide water bowl where their whiskers do not touch the edges. A simple adjustment can sometimes be enough to make them drink more often.

5. 🚶 Hydration on the go and while travelling

Whether you're going for a short walk, a day at the beach, or on holiday, it's essential to drink enough, even when you're on the go. During hot summer days, dogs and cats lose fluid more quickly, making it important to regularly offer fresh drinking water.

Don't wait until your pet is clearly thirsty. Offer small amounts of water at regular intervals while on the go, especially during long walks or car rides. This way, you help prevent dehydration and keep your loyal friend feeling comfortable.

🧳 Practical tips for on the go

  • 💧 Always bring enough fresh drinking water.
  • 🚶 Offer small amounts of water regularly.
  • 🌳 Take sufficient rest breaks in a shady spot.
  • 🚗 Never leave your pet in a parked car.
  • ☀️ Avoid intensive activities during the hottest hours of the day.

🥤 Choose a practical drinking solution

On the go, it's not always easy to find a water bowl or clean water. A portable travel drinking bottle makes it easier to offer your dog or cat fresh water at any time, without spilling or unnecessarily wasting water.

Whether you're going for a walk, travelling, or planning a day out, good preparation helps keep your pet comfortable and well-hydrated.

💡 Pawlio fact

Dogs often prefer to drink several small amounts of water rather than one large portion when on the go. Taking regular short drinking breaks is therefore often the best choice during hot days.

6. ⚠️ Common mistakes

With the best intentions, many pet owners make small mistakes during hot summer days that increase the risk of dehydration or overheating. By avoiding these pitfalls, you help your dog or cat stay healthy, comfortable, and well-hydrated.

🚫 Common Mistakes

💧 Waiting for your pet to ask for water

Dogs and cats don't always clearly show that they are thirsty. Therefore, regularly offer fresh drinking water, even when your pet doesn't drink on its own.

☀️ Placing the water bowl in direct sunlight

Water that sits in the sun for a long time heats up quickly and becomes less appealing to drink. Therefore, preferably place water bowls in a cool, shady spot.

🚶 Not bringing water during walks

Even during a short walk, your pet can lose a lot of fluids, especially on hot days. Therefore, always bring enough drinking water when you are out for a longer period.

🥣 Providing only one drinking spot

Some dogs and cats drink more when they can find water in different places in the house or garden. Multiple drinking points can help to increase daily water intake.

🚫 Thinking that one large drink is sufficient

It is better for your pet to drink small amounts regularly throughout the day than a large amount of water once.

🧼 Not cleaning the water bowl regularly

Bacteria, dust, and food residues can quickly accumulate in a water bowl, especially during hot summer days. Therefore, clean the water bowl daily and always fill it with fresh water. This keeps the water not only fresher but also more hygienic for your dog or cat.

✅ Remember this above all

Sufficient drinking starts with a good daily routine. By always providing fresh water, scheduling regular drinking breaks, and observing your pet closely, you significantly reduce the chance of dehydration.

💡 Pawlio fact

Stainless steel or ceramic water bowls often stay fresher longer than plastic water bowls and are also easier to clean.

7. Frequently asked questions

How much water should a dog drink per day?

As a general guideline, a dog needs an average of 50 to 70 ml of water per kilogram of body weight per day. During warm summer days, with a lot of exercise or illness, the water requirement can be significantly higher.

How much water should a cat drink per day?

A healthy cat needs an average of 50 to 70 ml of water per kilogram of body weight per day. Cats that primarily eat dry food generally drink more water than cats that receive wet food.

How do I know if my dog or cat is drinking enough?

Pay attention not only to how much your pet drinks, but also to its behavior. Good hydration usually goes hand in hand with a normal appetite, good energy, a moist mouth, and regular urine production.

What if my dog or cat hardly drinks?

If your pet continues to drink noticeably little, try changing the water more often, providing multiple drinking spots, or using a drinking fountain. If the problem persists or your pet shows signs of dehydration, contact your veterinarian.

Is cold water better during warm days?

Cool and fresh drinking water is ideal during warm summer days. Ice-cold water is usually not necessary. Make sure your pet can drink calmly and change the water regularly to keep it fresh.

Should I always bring water with me when I'm out and about?

Yes. During walks, outings, or holidays, it is important to always bring fresh drinking water. By offering your dog or cat small amounts of water regularly while on the go, you help prevent dehydration.

Summary

Adequate hydration is essential to help your dog or cat stay healthy and comfortable during warm summer days. By always providing fresh drinking water, recognizing the first signs of dehydration, and being well-prepared when on the go, you significantly reduce the risk of health problems.

With a few simple daily habits, such as regularly changing the drinking water, providing multiple water stations, and actively encouraging your pet to drink, you help your loyal friend get through the summer safely and well-hydrated.


💚 A well-hydrated pet is better protected against the heat and can fully enjoy a safe and carefree summer.

🐾 Pawlio expert advice.

💧 Good hydration starts with a daily routine.

Make sure your dog or cat always has access to fresh drinking water, especially during hot summer days. By regularly refreshing the drinking water, providing multiple drinking stations, and taking enough water with you on the go, you help prevent dehydration and support your loyal friend's health.

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