This researh examines the relationship between swimming proficiency and self-reported mental health outcomes in Chinese adults, considering different demographic variables. A descriptive-correlational research technique was used to recruit a varied sample from various areas and backgrounds in China. Systematic surveys evaluated swimming proficiency in multiple aspects, such as water confidence, breath control, body positioning, propulsion, coordination, and safety awareness. Additionally, self-reported mental health outcomes were measured, including emotional well-being, life satisfaction, self-esteem, sense of purpose, resilience, and social connectivity. The findings suggest that respondents usually have high confidence and proficiency in swimming abilities. However, there needs to be more understanding of safety measures, highlighting the need to enhance education on recognizing hazards and following safety procedures. Although respondents were skilled swimmers, they said that participating in swimming activities did not substantially impact their mental well-being, self-esteem, sense of purpose, resilience, or social connectivity. Nevertheless, a significant correlation between swimming proficiency and mental health outcomes was established, indicating that enhancing swimming abilities might benefit mental well-being. The study revealed many primary obstacles to participation in swimming, such as financial limitations, cultural and societal expectations, difficulties in accessing facilities, safety and health worries, and educational and psychological hindrances. The obstacles differ across different demographic groups, emphasizing the need for focused solutions.