South American Wine Regions

Argentina is South America's largest wine producer, with Mendoza at its heart. Mendoza accounts for more than 70% of Argentina's wine output, and its flagship grape is Malbec, a variety originally from France that found its greatest expression in the high-altitude vineyards of the Andean foothills. Malbec was introduced to Mendoza by French agronomist Michel Pouget in 1868, and it has since become the most widely planted red grape in the country. The high-altitude districts of Lujan de Cuyo and the Uco Valley, located between 800 and 1,500 meters elevation, are home to Argentina's most critically acclaimed Malbecs. Vineyards at this altitude benefit from intense sunlight and large diurnal temperature fluctuations, which preserve acidity while allowing full physiological ripeness. Argentine vintner Nicolas Catena Zapata is widely credited with elevating the status of Argentine Malbec through experimentation with high-altitude viticulture, and in 1994 he was the first to plant a Malbec vineyard at almost 1,500 meters in the Gualtallary sub-district. Beyond Malbec, Argentina also produces Cabernet Sauvignon, Bonarda, and the distinctive white Torrontes, with the Uco Valley also gaining recognition for Pinot Noir and Chardonnay at its cooler, higher-elevation sites.

• Mendoza's key sub-regions include Lujan de Cuyo (the first delineated appellation), the Uco Valley, and Maipu, each producing stylistically distinct Malbecs
• The Uco Valley's Gualtallary sub-district, home to Catena Zapata's legendary Adrianna Vineyard, is among the most sought-after terroirs in South America
• Malbec accounts for 40% of Argentina's red grape vineyards, with approximately 25,000 hectares planted in Mendoza alone
• Patagonia, in Argentina's south, is an emerging region producing exceptional cool-climate Pinot Noir

In Argentina's far northwest, the province of Salta is home to some of the world's highest vineyards, with sites in the Calchaqui Valleys surpassing 3,000 meters above sea level. At such extreme altitudes, intense UV radiation concentrates phenolics and pigments in grape skins, while cold mountain nights preserve freshness and aromatic intensity. The viticultural hub of the region is the town of Cafayate, which sits at approximately 1,700 meters and is synonymous with Argentina's signature white grape, Torrontes. Three distinct varieties of Torrontes exist in Argentina: Torrontes Riojano, Torrontes Sanjuanino, and Torrontes Mendocino; it is Torrontes Riojano that is considered the highest quality, producing intensely aromatic wines with notes of peach, apricot, and rose petal. Cafayate's sandy-loam soils, extremely low annual rainfall of 185 to 250 millimeters, and massive diurnal temperature swings create ideal conditions for both Torrontes and high-altitude Malbec. Today, approximately 4,000 hectares are cultivated across the Calchaqui Valley, including Argentina's oldest Torrontes vineyard, planted in 1862.

• Salta's Cafayate sub-region sits at around 1,700 meters; some sites in the broader Calchaqui Valleys exceed 3,000 meters, among the highest vineyards on Earth
• Torrontes Riojano is Argentina's principal aromatic white, producing floral, fruit-forward wines with notable natural acidity
• The rain shadow effect of the Andes creates very low annual precipitation, meaning Salta vineyards rely heavily on Andean snowmelt for irrigation
• Malbec, Cabernet Sauvignon, and Tannat are the most prominent red varieties in Salta, with bold concentration and vivid color driven by high UV exposure

Chile's geography is unique in the wine world: a thin strip of land sandwiched between the Pacific Ocean and the Andes, with the Atacama Desert to the north and Patagonian wilderness to the south. This configuration creates a natural isolation that has kept Chile phylloxera-free to this day, meaning many Chilean vineyards grow on their own ungrafted rootstocks. The country's wine history stretches back to 1544, and Chilean wine has historically been shaped by Bordeaux varieties brought over in the 1850s. Chile's most famous wine story is the rediscovery of Carmenere: for most of the 20th century, vast quantities of what Chilean growers thought was Merlot turned out to be Carmenere, a Bordeaux variety believed extinct after the phylloxera plague. In 1994, French ampelographist Jean-Michel Boursiquot identified the variety at Carmen vineyards in Maipo, and Chile suddenly found itself custodian of a grape no one had knowingly vinified for over 100 years. Today Chile holds over 80% of the world's Carmenere plantings. The Maipo Valley, just south of Santiago, is best known for Cabernet Sauvignon and is home to giants such as Concha y Toro and Santa Rita. The Colchagua Valley is celebrated for rich, ripe reds including Carmenere, Cabernet Sauvignon, and Syrah, while the cooler coastal Casablanca Valley, developed from the 1980s onward, specializes in Sauvignon Blanc and Chardonnay.

• Chile remains phylloxera-free thanks to its geographical isolation, allowing ungrafted vinifera vines to thrive
• Carmenere was officially recognized as a distinct variety in Chile in 1994, having been misidentified as Merlot for over a century
• Chilean wine regions use an east-west classification: Costas (cooler coastal zones), Entre Cordilleras (warm inland valleys), and Los Andes (high mountain areas)
• Key sub-regions include the Maipo Valley (Cabernet Sauvignon), Colchagua Valley (Carmenere, Cabernet, Syrah), Casablanca Valley (Sauvignon Blanc, Chardonnay), and Aconcagua (Cabernet, Carmenere)

Uruguay is South America's fourth-largest wine producer and arguably its most underrated. The country's modern wine industry dates to 1870, when Basque immigrant Don Pascual Harriague introduced Tannat, a powerfully tannic red grape originating in the mountains of southwest France. Tannat's thick skins proved ideally suited to Uruguay's humid, Atlantic-influenced coastal climate, offering natural resistance to disease and delivering consistent color, acidity, and aroma across varying vintages. Today Tannat accounts for 36% of all vinifera plantings in Uruguay, making it the most planted variety in the country. The majority of vineyards are concentrated in the rolling hills north of Montevideo, particularly in the department of Canelones, which alone has over 5,000 hectares under vine. Uruguay's Atlantic climate bears some resemblance to Bordeaux, and the country produces a wide range of varietals including Merlot, Chardonnay, Cabernet Sauvignon, Sauvignon Blanc, and Albariño alongside its flagship Tannat. Modern styles of Uruguayan Tannat have evolved from heavy, extracted wines toward more approachable expressions using gentler maceration and shorter oak contact, while serious single-vineyard bottlings demonstrate real aging potential.

• Tannat was introduced to Uruguay by Basque immigrant Don Pascual Harriague in 1870, and is now more extensively planted than in its original homeland of Madiran, France
• Canelones, north of Montevideo, is Uruguay's dominant wine department with over 5,000 hectares under vine
• Uruguay's Atlantic maritime climate provides high humidity but also cooling breezes, creating conditions broadly comparable to Bordeaux
• Bodega Garzon in the Maldonado department won Wine Enthusiast's Best New World Winery in 2018, raising the country's international profile considerably

Brazil is the third-largest wine producer in Latin America, and while its sheer size might suggest a tropical wine country, the finest wines come from the cool, hilly southern state of Rio Grande do Sul. Serra Gaucha, the country's oldest and most important wine region, accounts for roughly 80% of Brazilian wine production and owes its character to waves of Italian immigration beginning in 1875. Italian settlers, primarily from the Veneto and Trento regions, established a wine culture deeply tied to the region's hilly topography and cool, wet climate. Brazil's first official appellation, Vale dos Vinhedos within Serra Gaucha, was established in 2002. Because the humid subtropical climate of Serra Gaucha is naturally suited to early-harvested grapes with high natural acidity, the region excels at traditional-method sparkling wine production using varieties such as Chardonnay, Pinot Noir, and Moscato Branco. Brazilian sparkling wine has grown significantly in quality and ambition. Beyond Serra Gaucha, the Campanha region near the Uruguayan border offers a warmer, drier continental climate better suited to still wines, and is increasingly producing quality Merlot, Tannat, and Cabernet Sauvignon. Brazil's São Francisco Valley, located near the equator in the northeast, is a curiosity of the wine world, capable of producing two harvests per year due to its consistently warm, arid climate.

• Serra Gaucha, in Rio Grande do Sul, produces roughly 80% of Brazilian wine; Vale dos Vinhedos became Brazil's first DOC appellation in 2002
• Italian immigration from 1875 onward shaped Serra Gaucha's winemaking culture; major settlers came from the Veneto and Trento regions of northern Italy
• The region's hilly topography and wet summers favor sparkling wine production using traditional method with Chardonnay, Pinot Noir, and Moscato Branco
• The Campanha region, bordering Uruguay, is an emerging area for high-quality still wines from Merlot, Tannat, and Cabernet Sauvignon

South American wine regions share several defining geographical advantages that distinguish them from Old World counterparts. The Andes Mountains are the defining feature of the western wine nations: they create a rain shadow effect that dramatically reduces humidity and disease pressure, keeping annual rainfall in regions like Mendoza and Cafayate extremely low. Snowmelt from the Andes provides reliable irrigation through networks of canals and riverbeds, a system with roots going back to pre-Columbian times. High altitude is the other critical variable: the combination of intense UV radiation and wide diurnal temperature swings across Mendoza, Uco Valley, and Salta produces wines with deep color, concentrated flavor, and preserved natural acidity. Chile's unique east-west geography, hemmed between ocean and mountains, creates a natural air conditioning effect that makes the Pacific coastal zones among the coolest in the Southern Hemisphere. Uruguay's Atlantic influence is more subtle but equally important, providing the humidity that Tannat's thick-skinned vines can withstand while maintaining cool overnight temperatures. Brazil's Serra Gaucha benefits from altitude within what would otherwise be an impossibly warm and wet climate, its hilltop vineyards catching cooler air and allowing excess rain to run off. Across all these countries, the relative absence of phylloxera in Chile and parts of Argentina has allowed some of the continent's most historically important ungrafted vines to survive, offering a viticultural heritage of extraordinary rarity.

• The Andes create a rain shadow that limits disease pressure and annual rainfall across western wine regions, often to below 250mm per year
• High-altitude viticulture is a defining characteristic across Argentina and Chile, with UV radiation and diurnal swings driving concentration and acidity
• Chile remains entirely phylloxera-free due to its geographical isolation, enabling many vineyards to grow on ungrafted rootstocks
• The Humboldt Current, flowing northward along the Pacific coast, is the key driver of cool-climate conditions in Chilean coastal regions such as Casablanca, San Antonio, and Limari