A new and distinct grapevine variety ‘Sugrafortyeight’ is characterized by a midseason harvest date, the production of a large-sized, black, broad elliptic berry and a very large bunch size. The berries of ‘Sugrafortyeight’ are very firm and begin to ripen earlier than ‘Sugrathirtyfour’ (U.S. Plant Pat. No. 19,750) or ‘Autumn Royal’ (unpatented). The new variety ‘Sugrafortyeight’ is characterized by a broad elliptic berry shape compared to the elongated berry shape of both ‘Autumn Royal’ (unpatented) and ‘Sugrathirteen’ (U.S. Plant Pat. No. 10,434).
