Water

 is a main feature in the game. Its main purpose is to move the player's boat through the Stages and towards the Treasure. If the player were to touch the river's water, it will damage and eventually kill them. Water that appears in the building space when launching the boat and the lighter colored water near the Treasure, will not deal damage unless the player moves on the water outside the Building Space.

Beneath the water is a platform of Sand. When the player touches the water, the player will sink down slightly and start to take damage.

Water does approximately 20 damage per second to the player. It can also be replaced by Lava in the Lava Stage. The water will make the player's legs sink down slightly if walked on. Some Stages change the water's texture or color, such as the Bowling Stage and Orchestra Stage.

Trivia

 * While water in Build A Boat For Treasure was visually designed to replicate real-life water, the ROBLOX texture used for it is actually sand colored blue.
 * In an earlier update, the Levitation animation pack from the ROBLOX catalog would cause the player to hover over the water, and not take damage as a result. This was later patched in an update, of which the update in specific is unknown.
 * There are ways to avoid damage dealt by water, such as constantly jumping or being in a laggy server.
 * The RGB color of the water is: 0,118, 204.