The 2020–21 Ardal SE season (also known as the 2020–21 Floodlighting and Electrical Services Ardal SE season for sponsorship reasons) was to be the first season of the new third-tier southern region football in Welsh football pyramid, part of the Ardal Leagues. Teams were to play each other twice on a home and away basis. Due to the COVID-19 pandemic in Wales, the Football Association of Wales cancelled the 2020–21 seasons of the Ardal Leagues and below.