The study evaluates the technical potential of offshore wind energy in Vietnam based on a 30-year dataset (1991–2020) with a spatial resolution of up to 3 km. The offshore wind energy potential was determined at a height of 100 meters (above sea level) for Vietnam’s exclusive economic zone and was classified into shallow waters (depths below 50 meters) and deep waters (50–1000 meters) and by month of the year. The results of the technical wind energy potential calculation differ significantly fr