Few realize that Gale Isle is an alternate entrance into the Wind Temple. Long ago, a powerful, constant blast of wind sealed off the entrance (and gave the island its name). With the Iron Boots, you can walk into the wind and enter the Wind Temple dungeon.
Wind God’s Aria
If you have the Iron Boots—found inside the Secret Cave at Ice Ring Isle (E6)—you can walk through the powerful wind that blocks the cave entrance on Gale Isle. Using the Skull Hammer, smash the statue that is the source of the wind and enter the cave. Inside is a large stone tablet. Use the Wind Waker near the tablet to learn the “Wind God’s Aria,” which you use to find the Wind Sage and at points inside the Wind Temple dungeon. To play the song, hold 
for 6/4 time and then press 
, 
, 
, 
, 
, 
.
Hookshot
Hidden in the Wind Temple dungeon is the Hookshot, which grabs distant objects and enemies and pulls them toward you (or you toward them, depending on the weight of the object). Refer to the walkthrough for more information on the Hookshot.
Orange Rupee (via Treasure Chart #42)
Find and open Treasure Chart #43 (which is found from the “Piggy-Sitting” minigame on Windfall Island) to pull a chest from the Great Sea near Windfall Island. The chest contains a single Orange Rupee.