When you see yourself diving into clear water, then such water indicates the end of unfavorable situation. The dream shows that you will be able to escape the humiliation and other uncomfortable issues. The dream could also show that you may suffer setbacks for short period of time. Consider that the dream may show your desire to understand some situation from the beginning, therefore you are going down in order to find out everything by yourself. If you saw yourself diving into the water that is dirty, then such dream represents the unpleasant situation you have got yourself into. Perhaps the dream suggests you to go up, in order to escape from unfavorable consequences. The dream, in which you see other people diving into the water, indicates your ability to achieve harmony within your emotions and feelings. If you see some kind of animals diving into the water, then it shows your suppressed sexual needs you were hiding away.
Read more about dreaming of Diving in other dream meanings interpretations.