Berthet-Rayne produces wines from the Southern Rhône, where Mediterranean warmth and mistral winds shape the character of the region's signature varieties. The winery's portfolio centers on Grenache, Mourvedre, and Syrah—grapes that thrive in this sun-exposed terrain and yield wines of depth and structure. Cuvée Cadiac Châteauneuf-du-Pape, built from Mourvedre and Grenache, represents the appellation's power and complexity. Les Beauchiéres Cairanne blends Syrah, Garnacha, and Mourvedre into a wine of regional typicity. The Vieilles Vignes Côtes du Rhône draws on old-vine Grenache, Mourvedre, and Cinsault, anchoring the range with Southern Rhône tradition. These wines have been assessed by Wine Advocate, Wine Enthusiast, Wine Spectator, and Decanter.