There are several steps you can take to get your bike out of the water in Days Gone. First, you will need to locate the bike and swim to it. Once you are close enough, you can press the button prompt to retrieve the bike. However, if the bike is too deep, you will need to use the winch on your bike to pull it out of the water. If you don't have a winch, you can try using explosives to dislodge the bike from the water. Finally, you can also try using a nearby vehicle or object to push the bike out of the water.