McWilliam's operates in South Eastern Australia, a region that spans diverse terroirs across the continent's southeastern reaches. The winery's portfolio centers on two distinct expressions of Shiraz—the Syrah Canberra and the 1877 Shiraz—both of which have earned 92-point averages from prestige critics including Wine Enthusiast, Decanter, Wine Spectator, and Wine Advocate. These wines reflect the region's capacity for structured, age-worthy reds. The winery also produces Mount Pleasant Elizabeth Sémillon, a white that has garnered 90-point recognition from the same critical panel. Sémillon, when grown in Australia's cooler zones, develops mineral precision and textural complexity that deepens with time. McWilliam's range demonstrates the breadth of South Eastern Australia's viticultural potential, balancing the power of Shiraz with the finesse of classic white varietals.