August 2025 Sailing Stress Test

August 2025 Sailing Stress Test
Open date		14 August 2025
End date		14 August 2025
Update blog		None
Removal update		None

The August 2025 Sailing Stress Test was a limited preview of the Sailing skill, available to all members on special worlds separate from the live game. Running for about 2 hours on 14 August 2025, the purpose of the playtest was to test the performance of the system when many players were sailing simultaneously. During the stress test, players were limited to a small region of water surrounding The Pandemonium and could race in a loop around the island to achieve a time.

The stress test was the third public playtest of Sailing, following the alpha and beta in the preceding months.

Similar to the Sailing alpha and beta, the stress test was only available to players on one of the following supported clients:

• Java Client
• Official Client
• RuneLite

Players logged in for 15 minutes at a time, four times over the course of one day to stress test the Sailing system to its "absolute capacity" in preparation for the skill's release.

Times were 15:00 BST, 15:30 BST, 16:00 BST and 16:30 BST,^[1] after the second test 4 more worlds were open, 585, 586, 587, 588, 589.^[2]

Upon logging in, the player would spawn on a boat east of The Pandemonium near a starting line. Players could sail in a circle around The Pandemonium, optionally sailing over whirlpools to increase speed. Completing a lap would print out the time taken as well as the player's fastest time.

• The full world map seen during the Sailing Stress Test, including inaccessible areas