Dogster is reader-supported. When you buy via links on our site, we may earn a commission at no cost to you. Learn more.

Dog Health & Care

How Well Can a Mastiff Swim? Vet-Reviewed Facts & Water Safety Tips

Nicole Cosgrove
By Nicole Cosgrove · Reviewed & fact-checked by Dr. Maja PlatisaVet Approved
Dr. Maja Platisa
Reviewed & Fact-Checked byDr. Maja PlatisaDVM MRCVS (Veterinarian)
Maja joined our team in March 2023 as one of our in-house veterinarians. She is passionate about animals and their health and loves to help the readers with any issues or questions they have regarding their four-legged friends and other animal companions. Her passion is small animal medicine and emergency work, while she also has a great interest in animal welfare.View authorThe information is current and up-to-date in accordance with the latest veterinarian research. Learn more
Updated on August 6, 2026
Share
dogue de bordeaux sitting on a pier on a lake

As a dog owner, it’s your responsibility to provide your dog with proper care, which includes a good diet, veterinary care, grooming, training, and exercise. Mastiffs generally require moderate exercise rather than high-intensity activity, and maintaining joint health is important, which is why low-impact exercise like swimming can be beneficial. But how well can Mastiffs swim?

Typically, Mastiffs are not natural swimmers because they were never bred as water dogs. They also have large, heavy bodies that may make it more difficult. However, their legs and bodies are strong, and they can learn to swim, provided they get early and proper training.

divider dog paws 2 oct 2024

Can Mastiffs Swim?

The simple answer is yes. Many Mastiffs can learn to swim with a gradual, positive introduction to water, though their ability and comfort level can vary depending on individual build and temperament. However, due to their large, heavy build, some Mastiffs may never become confident or strong swimmers even with training. They were not originally bred to swim like the Poodle or Portuguese Water Dog, so they were not born with the natural abilities and instinct to swim. While training and early exposure can help, not all dogs, especially giant breeds, will become strong or enthusiastic swimmers.

Some Mastiffs may not enjoy the water, which is also an essential factor in whether or not they can swim. Apart from drinking water, they are not typically the biggest lovers of water as far as swimming is concerned. Therefore, even if they are able to swim, some Mastiffs may do so more for practical reasons than enjoyment, depending on the individual dog.

Depending on your Mastiff's personality and temperament, it may take some time to get used to being in water.

Image By: ElenaYakimova, Shutterstock

How Well Can Mastiffs Swim?

How well a Mastiff can swim depends on the individual dog’s build, comfort with water, and level of training, in addition to exposure from a young age. Some Mastiffs may learn basic swimming skills with consistent, positive training, but not all will become strong or confident swimmers. For a Mastiff to be an efficient swimmer, it will require training since they were not bred with the natural ability to swim like other water dog breeds. Other breeds that were bred for swimming typically have the right body size, shape, and coat to make swimming more efficient. A Mastiff was bred to be a guardian and has a large, powerful body.

However, it can be highly beneficial to teach your Mastiff to swim. It can provide them with great exercise and ensure they are safe if they fall into a large body of water. With proper introduction and supervision, some Mastiffs can learn to swim safely, but their effectiveness in the water will vary from dog to dog.

How to Teach Your Mastiff to Swim (5 Tips)

If you want your Mastiff to be a confident swimmer, follow these tips.

1. Start training your Mastiff as early as possible.

The sooner they get introduced to water, the more accustomed they will be.


2. A plastic kiddie pool is a great place to start since it is small, safe, and not very intimidating.

The water is not deep, so your pup can get used to it slowly without making negative associations with the water. Start slowly, and don’t force your pup into the water. Allow it to enter on its own terms, with a little encouragement. Make it a fun experience. As your Mastiff grows more confident, you can slowly increase the amount of water.


3. You can start by throwing your puppy's favorite toy into the water.

That way, you can also gauge how resistant and cautious your pup is to the water. Climb in the water with your Mastiff to help it feel more confident and safe, and try to engage in a game of fetch. The more fun they have, the more likely they are to enjoy the whole experience.


4. As you make the water deeper or expose your pup to deeper water, you should support its body as it doesn’t naturally float.

While you support its body, it will use its legs to paddle in the water, and over time, you can reduce the amount you support its body until your pup can swim on its own. You can also use a life vest if you are not confident enough to hold your pup. A life vest may be useful during initial swimming sessions or in any situation where safety or confidence is a concern, not only when moving to deeper water like pools or lakes, as it will get the dog adjusted to wearing it.


5. Ensure your Mastiff knows how to enter and exit the water.

You can teach your pup this by luring it with treats at the exit point, and for extra safety, you could also keep your dog on a leash.

divider dog paws 2 oct 2024

Tips for Safe Swimming

Safety comes first when swimming and should be your top priority when teaching your Mastiff how to swim.

Here are some tips for safe swimming:

  • Keep training sessions short to prevent your pup from getting too tired, and gradually increase duration based on your dog’s comfort and stamina. Some dogs can’t tell how tired they are and will keep going until you end their session. If your dog gets too tired, it could swallow water or potentially drown. Keep sessions to about 15 minutes long and slowly increase the time as your pup becomes more confident and skilled.
  • Never leave your dog to swim alone, and always watch it closely. It doesn't take long for something to go wrong.
  • Go slow with your pet, even when it's ready for the next step. Don’t rush to get it into deeper water, and wait until you and your Mastiff are 100% confident.
  • Don't let your Mastiff swim if the temperature is not ideal, both in and out of the water. If it is too cold for you, it’s too cold for your pup.
  • Have fresh water available so your Mastiff can rehydrate after swimming.
  • Always rinse your Mastiff after swimming. Pools often contain chlorine, and the saltwater from the sea can irritate and dry out your dog’s skin.
  • Use sunscreen! Yes, the sun's rays can also affect our pups. Use dog-appropriate sunscreen to protect its skin on sweltering days, and don’t forget their exposed little nose.
  • Put a life jacket on your dog before swimming in pools, lakes, rivers, or the ocean.
divider dog paws 2 oct 2024

Final Thoughts

How well Mastiffs swim will depend on their training. While they were not bred to be water dogs, they can swim, and some can be trained to be strong swimmers with time and patience. The biggest drawbacks that will affect their swimming skill level are their heavy bodies and the fact that they are not naturally bred swimmers. However, that doesn’t mean they can't be trained, and swimming can be an excellent exercise for them. Mastiffs should be trained early so they grow accustomed to water, and eventually, they may look forward to a cool dip on a hot day.

Sources

Featured Image Credit: Vitaly Titov, Shutterstock

The Dogster Newsletter

Expert dog care, straight to your inbox

News, insights, expert advice, and everything dog.

No spam — unsubscribe anytime.

By signing up, you agree to our Terms & Conditions and Privacy & Cookies Policy.

Click a star to rate. You can leave written feedback afterwards. (We read all feedback.)

Nicole Cosgrove
Authored by

Nicole Cosgrove

Leave a Reply

You're very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let's have a positive and constructive conversation.

How Do Dogs Know How to Swim? Vet-Verified Facts & Explanation

How Do Dogs Know How to Swim? Vet-Verified Facts & Explanation

We all have specific images that come to mind when we think about what dogs do, like peeing on fire hydrants, digging holes in the garden, chewing shoes, and p…

Kathryn Copeland
By Kathryn Copeland · 2 months ago
Dog Swimming Lessons: Vet-Approved Tips & Important Considerations

Dog Swimming Lessons: Vet-Approved Tips & Important Considerations

There are few activities more fun than taking a dog to a beach, lake, or other body of water and watching them splash around. Some dogs have a strong attractio…

Greg Iacono
By Greg Iacono · 2 months ago
Can All Dogs Swim? Canine Water Vet-Verified Safety Facts & FAQ

Can All Dogs Swim? Canine Water Vet-Verified Safety Facts & FAQ

Many new dog owners eagerly anticipate the warm weather and plan outdoor activities with their canine companions. Among the exciting adventures that come to mi…

Nicole Cosgrove
By Nicole Cosgrove · 2 months ago
How to Get Your Dog to Like Swimming: 5 Vet-Approved Teaching Tips

How to Get Your Dog to Like Swimming: 5 Vet-Approved Teaching Tips

Swimming is a great way to cool down, especially on hot summer days. It’s also a great way to encourage your dog to exercise or lose weight, or to help an agin…

Nicole Cosgrove
By Nicole Cosgrove · 2 months ago

How Well Can a Maltese Swim? Vet-Verified Facts & Important Precautions

Maltese dogs were not bred to swim, so they are generally not known for their swimming ability. However, some of these pups may enjoy being in the water to a c…

Kristin Hitchcock
By Kristin Hitchcock · June 17, 2026
How Well Can a Maltese Swim? Vet-Verified Facts & Important Precautions

How Long Do Mastiffs Live? Vet-Reviewed Average Lifespan, Data & Care Guide

The noble Mastiff is a dog with a big history, a big body, and a big heart—and an unfortunately short lifespan. Sadly, giant breeds don't tend to live as long…

Kit Copson
By Kit Copson · July 10, 2026
How Long Do Mastiffs Live? Vet-Reviewed Average Lifespan, Data & Care Guide

Can a Pug Swim? Vet-Reviewed Facts & Safety Tips for Your Pup

Pugs are wonderful, affectionate, and charming companions, so it's no surprise that you'd want to share all of life's adventures with them, including trips to…

Nicole Cosgrove
By Nicole Cosgrove · June 17, 2026
Can a Pug Swim? Vet-Reviewed Facts & Safety Tips for Your Pup

Can Dobermans Swim? Challenges, Tips & FAQs

As dog owners, it’s natural to want our best pals to take part in the activities we love. Often, we take our dogs on long hikes, car rides, and trips to the co…

Melissa Gunter
By Melissa Gunter · June 17, 2026
Can Dobermans Swim? Challenges, Tips & FAQs

How to Keep Your Dog Safe Around the Pool: 9 Vet-Approved Tips

Swimming pools are fun and refreshing, but they can pose a risk to humans and pets. Whether it's an in-grown pool or an above-ground model, you must prevent yo…

Nicole Cosgrove
By Nicole Cosgrove · July 24, 2026
How to Keep Your Dog Safe Around the Pool: 9 Vet-Approved Tips

9 Common Health Problems in Mastiffs – Diseases to Be Aware Of!

Mastiffs are gentle giants who make excellent protectors and even better companions. But before you decide to buy or adopt one, you may wonder more about what…

Ashley Bates
By Ashley Bates · June 16, 2026
9 Common Health Problems in Mastiffs – Diseases to Be Aware Of!

How Well Can a Basset Hound Swim? Vet-Reviewed Facts & Training Methods

Basset Hounds are cute and cuddly. With their puppy dog eyes and long, droopy ears, they're hard to resist. They were bred to be hunting dogs, and some pet par…

Patricia Dickson
By Patricia Dickson · June 16, 2026
How Well Can a Basset Hound Swim? Vet-Reviewed Facts & Training Methods

Do Belgian Malinois Like Water (And Can They Swim)? Vet-Reviewed Benefits, Facts & FAQ

The Belgian Malinois is a world-class working breed known for its highly active personality. If you are the proud owner of a Belgian Malinois, you know that le…

Nicole Cosgrove
By Nicole Cosgrove · June 16, 2026
Do Belgian Malinois Like Water (And Can They Swim)? Vet-Reviewed Benefits, Facts & FAQ

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.

You may opt-out at any time. View our Privacy Policy for more information.

The Dogster app on a phone