To dream of floating, denotes that you will victoriously overcome obstacles which are seemingly overwhelming you.
If the water is muddy your victories will not be gratifying.
Floating in water can be symbolic of floating on top of your emotions and being in harmony with the unconscious.
Floating through the air has the same symbolism as flying.
Floating usually represents your current feelings of peacefulness and general freedom.
In order to interpret any dream appropriately some self evaluation and honesty is required.
Meaning of dreams is very personal and specific for each dreamer.