Taken from NASM Essentials of Personal Fitness Training
Water is the soup of life. It constitutes approximately 60% of the adult human body by weight…Consuming an adequate amount of water will benefit the body in the following ways.
Endocrine gland function improves
Fluid retention is alleviated.
Liver functions improve, increasing the percentage of fat used for energy.
Natural thirst returns.
Appetite decreases significantly.
Metabolic functions improve.
Nutrients are distributed throughout the body.
Body-temperature regulation improves
Blood volume is maintained.
My guess would be yes, water helps with weight loss.