|Release date||1 August 2005 (Update)|
|No. of banks||None|
|No. of altars||None|
|No. of obelisks||None|
|Teleportation||Speak to Jarvald or Waterbirth Teleport (Group)|
|Music||The Desolate Isle|
|Inhabitants||Humans, Hobgoblin, Rock Crabs|
Waterbirth Island is a crescent-shaped island accessible from Rellekka's westernmost pier by talking to Jarvald. The island itself contains several spawns of Rock crabs and a few hobgoblins. However, the main attraction of Waterbirth Island is the Waterbirth Island Dungeon, filled with dangerous creatures such as Dagannoths, Wallasalkis, Giant rock crabs, and Rock lobsters. Many players go to this dungeon to fight the three Dagannoth kings to get the pieces needed for Fremennik armour. Snape grass is also very plentiful here. A second dungeon, the dagannoth guardian dungeon, is located on the south of the island. Waterbirth Island and its two dungeons play a fairly large role in the quest Blood Runs Deep.
Players may teleport to the island using the Lunar magic spells Waterbirth Teleport or Tele Group Waterbirth, which require 72 and 73 Magic respectively. In addition, a player who has the Fremennik sea boots 3 (by completing all hard Fremennik Tasks) has the option of changing the teleport location of the enchanted lyre to Waterbirth Island. Once the teleport location of the lyre has been toggled by speaking to Olaf the Bard in Rellekka (near the Quest Hall), it is not necessary to wear the boots to make use of this teleport. To sail to the island for free, players need to complete The Fremennik Trials. Players who have not completed the Fremennik Trials quest can go to the island by starting the quest and paying Jarvald a fee of 1000 coins.
Upon arriving at Waterbirth Island, snow will fall in front of the player's screen. As the player lands on the island, they may follow the path west and south to venture inside Waterbirth Island Dungeon.