Abstract Tornado occurrences vary significantly across regions in the globe, attributable in part to variations in regional climate and topography. This study analyzes the long‐term convective environments associated with tornadoes in southern China, a region previously identified as having the most favorable meteorological conditions for tornadoes across Eurasia. Results reveal a clear spatial alignment between high‐STP days and tornado occurrences, particularly in high‐instability coastal areas. In contrast, high‐altitude areas, despite strong shears, are less favorable due to limited instability and elevated lifting condensation levels. Inland Guangxi experiences a high number of high‐STP days but a relatively low tornado frequency compared to coastal Guangdong, primarily due to the limited occurrence of convection during spring. Over the past 4 decades, vertical wind shear has generally declined, while instability has trended more supportive of convective development in coastal regions, which combining a slight weakening trend of STP. Additionally, STP displays a 2–3‐year oscillation pattern, potentially linked to variability in the ENSO cycle.