Water and Hydration for Tortoises

Yes, tortoises drink. The persistent belief that they get all their water from food is wrong, and it is responsible for a good deal of avoidable kidney damage.

Do tortoises drink?

They drink, and in the wild they drink opportunistically and heavily when the chance arises.

Spanish Testudo graeca spend much of the summer aestivating through drought. Occasional summer thunderstorms bring them out specifically to drink and to void accumulated urates before they retreat again. That is not an animal indifferent to water. It is one adapted to take on a great deal of it whenever it appears.

The confusion comes from conflating arid habitat with low water requirement. A desert species is adapted to survive between drinks, not to need fewer of them.

Water availability

• Always available. A shallow dish, present permanently.
• Shallow enough to stand in, with sides the tortoise can get over unaided. Drowning risk is real in deep dishes, particularly with juveniles.
• Change it daily. Tortoises routinely defecate in their water.
• Large enough to sit in, since many tortoises drink while soaking.
• Outdoors too. A planted run needs a water dish as much as an indoor enclosure does.

Hydration and food

This is where hydration connects to diet, and where a common shortcut backfires.

Wild tortoise forage is low to moderate in water content. Wild tortoises are not hydrated by their food, they are hydrated by drinking. So using watery food to hydrate a captive tortoise inverts the natural arrangement.

Iceberg lettuce and cucumber are the usual culprits. Neither is dangerous, both are close to nutritionally empty, and a tortoise filling up on them is one not eating the fibre it needs. See what vegetables can tortoises eat.

Hydration also protects against the consequences of a poor diet. Excess protein raises blood urea, and dehydration compounds that directly. Bladder stones are associated with the combination of high protein intake and inadequate water, which is why the two topics keep appearing together on this site.

Bathing

Bathing is a supplement to drinking water, not an alternative to it.

• Shallow, lukewarm water, deep enough to reach the lower shell but not the head.
• Fifteen to thirty minutes is the usual guidance.
• Two or three times a week for juveniles, less often for healthy adults with good water provision.
• Daily in the run-up to hibernation, where it encourages both drinking and gut clearance. See feeding before hibernation.
• After hibernation, once or twice daily in the first week, and confirm the tortoise urinates before worrying about appetite.
• It doubles as a health check. Use the time to look at eyes, nose, mouth and limbs.

Species differences

Two things get conflated here, and separating them matters.

Drinking water is needed by every species without exception.

Ambient humidity is species-specific and is a housing question rather than a hydration one.

So a Horsfield’s tortoise needs constant access to water and dry housing at the same time. Those are not contradictory instructions.

Juveniles of every species dehydrate faster than adults, including arid species, and humidity during early growth is implicated in shell pyramiding. See baby tortoise food.

What urates tell you

Urates are the white or cream pasty waste tortoises pass alongside droppings, and they are a useful indicator.

Signs that need veterinary attention

• Sunken eyes or loose, wrinkled skin around the limbs
• Gritty or hard urates, or straining
• No urination after hibernation
• Lethargy combined with a dry appearance
• Refusing to drink or bathe over an extended period
• Weight loss alongside any of the above

Dehydration is treatable and dangerous when ignored, and it compounds nearly every other problem discussed on this site. A reptile-experienced vet can rehydrate an animal far more effectively than a bath can.

For the wider diet picture, see tortoise feeding guide and tortoise diet. Calcium interacts with hydration through renal function and is covered in calcium and supplements.

Guidance here draws on the Tortoise Trust, the British Chelonia Group and published veterinary sources, checked as described in our sources and review policy. This is husbandry information and not a substitute for veterinary care. See our veterinary disclaimer.

Last reviewed: September 2026.