The salary of an underwater welder can vary based on factors such as experience, location, and the type of work being performed. On average, an underwater welder in the United States earns between $50,000 and $100,000 annually. However, more experienced welders or those working in high-risk environments, such as offshore oil rigs, can earn upwards of $150,000 or more. Specialty certifications and advanced diving skills can also increase a welder’s earning potential. In addition to the base salary, underwater welders often receive additional benefits such as hazard pay and per diem allowances for travel and living expenses when working at remote locations.