The High-Altitude Wines of Argentina

Originally published September 2020 · Updated October 2026

By Brian Freedman

Altitude matters in Argentina because it lets growers find suitable temperatures across a country that spans a wide range of latitudes. Higher sites are often cooler than nearby lower ones and receive more intense sunlight and ultraviolet radiation, which can shape ripening and berry composition. Those benefits come with real trade-offs, including frost, scarce water and radiation stress, and the results always depend on site, variety, season and vineyard management.

High-altitude vineyards have become a thing. They’re nothing new, of course—producers have long valued mountainside fruit—but the character of grapes grown well above sea level has recently become more of a focus among growers, winemakers and sommeliers than ever before.

It makes sense. Following an era during which very ripe fruit, plush texture and seamlessly integrated tannins came to define so-called “good wine,” a swing of the proverbial pendulum in the other direction was inevitable. The same thing happens in music, fashion, film and beyond.

High-altitude wines are a fascinating sub-category. It’s always tricky to speak about any type of wine in broad terms, but Argentina is one of the best places to understand what altitude can, and cannot, do.

A Mountain Identity, With Exceptions

For Martín Di Stefano, viticulturist at Zuccardi in Mendoza’s Uco Valley, Argentina’s wine identity is above all a mountain one. Many of the country’s major regions, from the northwestern valleys of Salta and Catamarca to Mendoza and San Juan, lie in or near the foothills of the Andes. That is his interpretation rather than a rule, though: Argentina also grows grapes at much lower elevations in Patagonia and, increasingly, near the Atlantic coast in Buenos Aires province, where vineyards around Chapadmalal are influenced by the cold ocean current. (Decanter on Argentina’s new frontiers)

For a region-by-region overview, see our guide to the wine regions of Argentina.

Water: The Real Limit on Mendoza’s Vineyards

Mendoza’s dry climate makes irrigation central to wine production. Growers depend on snowmelt-fed rivers flowing from the Andes, delivered through canal systems, and in many areas on groundwater pumped from wells. Much of the recent expansion of high-elevation vineyards in the Uco Valley, for example, has relied on groundwater and drip irrigation. (Saldi, CONICET, on water use in the Uco Valley, in Spanish)

How much water a vineyard needs varies with the weather, soil, canopy, yield goals and irrigation efficiency. Access to water, infrastructure and water rights, as much as altitude, determines where vineyards can be developed, which is why only a small share of the province’s land is cultivated at all.

How Latitude Sets the Altitude

How high grapes can be planted in Argentina is determined as much by latitude as by anything else. In the north, closer to the equator and therefore warmer, vines can be planted at greater elevations; further south, sites that high would generally be too cold. (Conversely, planting too low in the north can produce conditions that are too warm.) Suitable sites also depend on exposure, frost risk and the length of the growing season, so this is a broad climatic relationship rather than a fixed rule.

A few examples show the range:

• Northwest (Calchaquí Valleys, Salta): vineyards are planted between about 1,700 and 3,100 meters (5,600 to 10,200 feet). (Wines of Argentina)
• Mendoza (Uco Valley): Zuccardi’s Piedra Infinita vineyard in Paraje Altamira sits at about 1,100 meters (3,600 feet), and a Gualtallary vineyard used in UV-B research sits at about 1,450 meters (4,760 feet).
• Patagonia and the Atlantic coast: much lower vineyards, where the cooler conditions come from latitude and, near Chapadmalal, from the ocean rather than from altitude.

Higher is not automatically better. Each of these areas produces fine wine; altitude is one tool for finding the right temperature, not a quality ranking.

Altitude, Temperature and Sunlight

Temperature and radiation are separate influences, and it helps to keep them apart. Higher sites are often cooler than nearby lower ones, and the wide difference between day and night temperatures in many Andean valleys can slow ripening and help grapes retain acidity. At the same time, solar and ultraviolet exposure may be greater at altitude.

Research in Mendoza shows how that radiation can matter. In field experiments with Malbec at a high-altitude vineyard in Gualtallary, solar UV-B increased phenolic compounds in the berry skins, but it also reduced berry size and yield and restricted vine growth. (Berli et al., 2013; Berli et al., 2015) In other words, the same conditions that can concentrate color and structure also stress the vine, and neither the grape nor the finished wine responds identically at every site.

Two common shortcuts are worth avoiding. Greater elevation does not automatically place a vineyard above the clouds, and it does not give longer daylight: at the same latitude and date, day length is essentially the same. What changes is the intensity of the radiation and the temperature, both of which also depend on local cloud cover and topography.

Frost and Topography

Mountain viticulture makes vineyard planning a complex exercise. During a reporting visit, Di Stefano described how cold air flows down from the mountains and how the shape of the slope changes the risk: where the land steepens, cold air moves on more quickly, and where it flattens out, the cold air slows and settles.

That matches the general principle. On clear, calm nights, cold air can flow downslope and collect in depressions or behind obstacles. A site with effective cold-air drainage may be less exposed to this kind of radiation frost than a nearby low-lying site. But slope alone is not a guarantee: aspect, elevation, airflow, barriers and the type of frost event all matter, and a regional mass of cold air can damage higher sites too. (FAO on site selection and cold-air drainage)

The Andes and the Soils of the Uco Valley

The Andes dominate the western horizon of Mendoza’s vineyards. The main range, the Cordillera Principal, includes Aconcagua, the highest mountain in the Americas at nearly 23,000 feet (about 6,960 meters). In the Uco Valley, vineyards sit on the plains and foothills below the main range and its associated front ranges.

Rivers flowing out of those mountains have built up numerous alluvial fans and terraces over millennia, creating a remarkable diversity of soils within short distances. One distinctive feature, highlighted by Di Stefano, is stones coated in calcium carbonate. At Zuccardi’s Piedra Infinita vineyard in Paraje Altamira, the producer describes soils rich in large granite stones and gravel covered with calcium carbonate. (Zuccardi technical sheet)

That variety matters mainly through what it does in the vineyard: differences in stone content, depth and texture change drainage and water availability, which in turn change vine vigor and ripening. Because of this diversity, the viticulture has to change from place to place to translate each vineyard’s location into the wine. “It’s a nice, beautiful challenge,” said Di Stefano.

Trade-Offs Growers Manage

High-altitude viticulture is not only about benefits. Growers manage:

• Frost, through site selection, vineyard layout and protecting low-lying blocks.
• Radiation and heat stress, through canopy management and row orientation. At Zuccardi, Di Stefano has explained that vine rows were angled away from the traditional north–south orientation to protect fruit from midday sunburn. (Jancis Robinson on the Zuccardis)
• Scarce water, through irrigation planning and efficient delivery systems such as drip irrigation.
• Shorter or riskier seasons at the highest and coolest sites, where late frosts and early cold can limit what will ripen.

What Altitude Can Mean in the Glass

How altitude affects a wine’s character is difficult to describe in broad terms. Many sommeliers and critics describe high-altitude wines as having firm, “crunchy” tannins, a sense of tension or coiled energy, and what they call minerality. These are tasting impressions, not a general law, and minerality in this sense does not mean that minerals from the rocks pass directly into the wine.

The finished wine reflects the grape variety, its ripeness, the extraction, the winemaking choices (such as barrel aging, the type of wood and lees stirring) and the site. Altitude is one influence among many, though in Argentina it is often an important one. To explore the country’s signature grape further, see our article on Malbec’s versatility, and for Argentina’s signature aromatic white, our guide to aromatic white wines covers Torrontés.

Why Argentina Is the Place to Start

What is difficult to argue with is the increasing prominence of high-altitude wines, and few places illustrate the subject as clearly as Argentina, where you can taste wines from very different elevations, latitudes and soils within one country.

Altitude and its effects on climate and grape composition are part of how wine regions are studied in the WSET Level 3 Award in Wines. To see the vineyards for yourself, join Napa Valley Wine Academy’s Argentina wine study trip.