There is no way to get the Gale Boomerang without beating the minor boss in the forest temple (the monkey chief).
as soon as you defeat the Minny Boss in the Forest Temple you get the boomerang
In the first temple
defeat ganon
most likely you will use the boomerang
get the boomerang.
defeat Zelda
You have to beat the mini-boss in the first temple, which is Ook, a white monkey
Hit him with your gale boomerang.
The Gale Boomerang (who houses the Fairy of Winds) is found on the floor after you defeat the mini-boss, Ook.
Mainly by usingyour boomerang you havereceived in the Forest temple by beating the monkey. (miniboss)
It's in the Forest Temple (1st Dungeon. You need to beet Ook to get it though.
Follow the trail on the ground