Can Tortoises Swim?

1 Can Tortoises Swim?

Tortoises cannot swim. Unlike aquatic turtles, their build is unsuited to water, but they do float, so a tortoise that ends up in water will not immediately drown. Still, they are not made to live in water and are happiest—and healthiest—on land.

Long periods in water raise the risk of shell rot and even drowning, so always keep a tortoise’s habitat dry except for brief, supervised soaking.

2 Why Their Bodies Float

Although a tortoise cannot swim, its shell generates real buoyancy. A large lung volume and a wide carapace let many species float for a surprising time. The Aldabra giant tortoise is the standout: in water it moves faster than it walks on land. Adults can weigh around 250 kg with shells up to 1.5 m, yet their huge lungs make floating effortless.

Floating ability differs by species—some more water-tolerant tortoises float longer—but floating is not the same as swimming. Aquatic turtles have streamlined, flatter shells suited to water; a tortoise’s high, rounded dome works against it.

Even so, water turtles can drown. They cannot breathe underwater, and deep water kills juveniles. Young water turtles need shallow water that deepens only as they grow.

3 Safe Soaking for Tortoises

For soaking, set up a shallow tray with a gentle slope from water to land so the tortoise can climb out and never flip into deep water. Keep the level low—just enough to cover part of the shell. This lets a tortoise hydrate and defecate safely without the drowning risk of a deep pool.

Always match husbandry to the species: land tortoises stay dry, and even aquatic turtles need correctly graded water depth. For reliable turtle-care guidance, always turn to reputable reptile resources.