Parkinson’s disease is characterized by motor and non-motor symptoms that lead to progressive disability, with a consequent deterioration in the quality of life and rising healthcare costs. Rehabilitation is a key element of the multidisciplinary treatment for Parkinsonian patients, although there is no general consensus on what the principles involved are, nor is there widespread application in practice of the evidence-based recommendations. Aquatic therapy is part of the therapeutic armamentarium recommended for Parkinsonian patients and it offers a valid alternative to the traditional settings for treatment.