⏱ 1 min read
The Short Version
Smoke residue can cling to grapes like soot on fabric, threatening vintages with an ashy taint long after the flames subside. Fortunately, Bordeaux’s 2026 vintage appears unscathed, as resilient old vines have balanced summer heat with surprisingly crisp acidity.
In This Article
Smoke travels far beyond the reach of flames, depositing heavy oils and tar that can cling to a vineyard like soot on fabric. While over 100,000 acres burned in Bordeaux this past summer, the true threat was the airborne residue posing a risk of smoke taint—an undesirable ashy character that can haunt a vintage even when the fire never touches the vines.
It needs fermentation to release… and then you perceive it.
The Mechanics of Taint
The danger lies in how smoke interacts with the fruit’s biology. Compounds can bind with grape sugars or be absorbed into the skins. Napa Valley winemaker Julien Fayard, behind projects such as Brion and Purlieu, compares the intensity of the residue to the smell of smoke on clothes at home. Once these compounds are stored, they remain hidden until winemaking begins. It needs fermentation to release… and then you perceive it. Because many volatile elements reside in the skin, red wines face higher risks than whites during maceration. To combat this, winemakers may employ faster extraction and gentler maceration to limit how much juice draws from those potentially tainted skins.
Resilience in the 2026 Vintage
Despite the fires, experts suggest Bordeaux has emerged largely unscathed. Carlton McCoy, Master Sommelier and CEO of Lawrence Wine Estates—which owns Château Lascombes in Margaux—reports no evidence of smoke taint affecting the 2026 vintage. Instead, heat proved to be the primary driver. The season was notably warm and dry, which typically leads to heavier profiles, but McCoy observes that acid levels have held up surprisingly well, providing a necessary counterweight to the expected opulence.
This balance stems from vines acclimating to warmer seasons and a higher average of older vines, which remain more constant during ripening extremes. Jamie Ritchie of Berry Bros. & Rudd USA notes that the industry’s long history of navigating weather challenges ensures such resilience is baked into the trade. Ultimately, while experts debate the nuances of smoke and heat, consumers will simply find themselves enjoying great bottles in excellent condition.
Do you think climate-driven shifts like higher acidity in warm vintages will become the new standard for premium Bordeaux?
Questions & Answers
What is smoke taint in wine production?
Smoke taint is an undesirable ashy character in wine caused by airborne residue from wildfires depositing heavy oils and tar onto grapevines. These compounds can bind with grape sugars or be absorbed directly into the skins of the fruit. The taint often remains hidden during the growing season and only becomes perceptible during the fermentation process. Because many of these volatile elements reside in the skins, red wines are generally at a higher risk of experiencing this flavor profile than white wines.
How do winemakers protect red wines from smoke taint?
Winemakers combat smoke taint by employing faster extraction methods and gentler maceration techniques during the production process. These strategies are designed to limit how much juice is drawn from the grape skins, which is where many of the potentially tainted volatile compounds are stored. By reducing the contact time between the juice and the skins, producers can minimize the absorption of ashy flavors. This approach is particularly critical for red wines, as they undergo maceration which increases their vulnerability to skin-based residues.
Why did the 2026 Bordeaux vintage maintain good acidity despite high heat?
The 2026 Bordeaux vintage maintained surprising acidity levels due to vines acclimating to warmer seasons and the presence of older vines. These older vines provide more constant performance during ripening extremes, helping to balance the heavy profiles typically caused by warm and dry weather. While the heat led to more opulent fruit profiles, the preserved acidity acts as a necessary counterweight. This biological resilience allows the wines to maintain structure even when facing the climatic challenges of a notably warm growing season.
How does wildfire smoke affect grapes even if flames do not touch them?
Wildfire smoke affects grapes by transporting airborne residue that can cling to vineyards like soot on fabric. Even if the flames never reach the vines, the smoke carries heavy oils and tar that settle on the fruit. These chemical compounds interact with the biology of the grape by binding with sugars or being absorbed into the skins. Once these elements are stored within the fruit, they can stay dormant until winemaking begins, at which point fermentation releases the unpleasant ashy flavors.
Originally reported by foodandwine.com.
