Decoding the Label (Part 4): Vintage and Alcohol, the Clues You Were Missing

Hello, wine adventurers! Welcome back to "Decoding the Label", our series for those who'd rather not see a bottle as a riddle. We've already travelled through Portugal's wine regions and dived into the DNA of the grape varieties. Now there are two numbers left, living on almost every label, that many people overlook: the vintage year and the alcohol content.

They look like technical details, but they're two of the most honest clues a label gives you. One tells you the wine's time; the other, its inner temperature. Learn to read them and you'll know, before you even open the bottle, whether you're holding a wine to drink now — fresh and light — or a giant to lay down and wait for. Let's get to it!

The vintage year: the wine's clock

The vintage is simply the year the grapes were picked. And it matters more than it seems, because every year has its own weather: a hot, dry summer gives riper grapes and more powerful wines; a cooler, wetter year gives lighter wines with livelier acidity. The year on the label is, in essence, a snapshot of the weather during that harvest.

For most whites, rosés and young reds, the rule is simple: the more recent, the better. These are wines made to be drunk in the prime of youth, when the aroma is fresh and vibrant. The Landcraft Loureiro 2024, from the Vinhos Verdes, is a perfect picture of this: plenty of freshness, salinity and an elegant, sharp acidity, with the intense aromas that are the signature of the Loureiro grape. A wine like this wants to be drunk young, while that youth is still singing in the glass.

Tempted by a fresh, young white? Discover our Vinhos Verdes selection here!

Years to keep: wines that gain with time

There are, however, wines that play the opposite game. These are reds of great structure — firm tannins, vibrant acidity, concentration — built not for the present but for the future. In these, the vintage stops being an expiry date and becomes the starting point for a long journey inside the bottle.

The greatest example is also a Portuguese legend: Barca Velha 2011, from the Douro, bottled only in truly exceptional years. It has a deep ruby colour, a complex aroma of spices, balsamic notes, cedar, ripe plum and slate, and a palate of vibrant acidity and very firm tannins ending in an extremely long finish. The producer's own notes are clear: although it's ready to drink, it has long cellaring potential and may reach its peak 15 to 20 years after the harvest. It's proof that, in certain wines, the year on the label is a promise of patience.

You don't need a collector's budget, though, to own a wine for keeping. The Casa do Canto Baga Bairrada Clássico 2017, made from the stubborn Baga, shows a crystalline garnet colour, resinous and pine-needle aromas, red-fruit jam and toasty notes, with excellent volume on the palate. And an estimated longevity of 25 to 30 years. Buying a bottle like this is, quite literally, buying time.

Want to start your own cellar of keepers? Explore our Douro wine selection here!

And when there's no year? The mystery of "non-vintage"

Sooner or later you'll come across a bottle with no year at all on the label — sometimes with the letters NV, for non-vintage. It's not an oversight: it's a choice. Many Port wines and sparkling wines are blends of several years, deliberately combined to always deliver the same style and quality, regardless of what the weather did in each harvest.

The Piano Porto 10 Years Old Tawny is a fine example: instead of a year, it states an average ageing age. It excels in balance, with floral and ripe-fruit notes, spices and dried fruits that come from its long ageing in wood, and a long, classically styled finish. Here, the number that matters isn't the vintage — it's the time spent in casks before reaching the glass.

Curious about these nectars of time? Explore our Tawny Port selection here!

Alcohol content: the wine's inner temperature

On to the second number. The alcohol content, as a percentage, measures how much of the grapes' sugar turned into alcohol during fermentation. And since grapes from warmer climates ripen with more sugar, that number is also a clue about the sun the wine caught — and the body it will have in the glass.

In general, a lower figure (around 11% to 12.5%) tends to announce a lighter, fresher, easier wine, like our Landcraft Loureiro 2024. A high figure, on the other hand, points to full-bodied, powerful wines. Take the Ovelha Negra Tinto 2024, an Alentejo red at 16% with a deep, intense colour, aromas of very ripe red fruits, mocha and orange blossom, and a round, voluminous palate with robust but silky-textured tannins, dense body and a persistent finish. It's the heat of the south translated into degrees. A word of caution: more alcohol doesn't mean a better wine — it means a different style, warmer and more enveloping, that calls for a dish to match.

Fancy the sun-drenched power of the south? Discover our Alentejo wine selection here!

The special case of fortified wines

And what about Port wines, with their 19% or 20%? They don't get there from sun alone. They are fortified wines: midway through fermentation, grape spirit is added, which halts the conversion of sugar into alcohol. The result is a wine that's both sweet (because sugar remains) and powerful (because it gained extra alcohol).

The Piano Porto Vintage 2019 brings both clues of this article together in a single bottle: it has a vintage year — because, unlike the blended Tawny, a Vintage is born of a single exceptional harvest — and it has 20% alcohol, the fruit of fortification. Deep black in colour, it reveals aromas of blackberry and cassis wrapped in violets, resinous notes and a subtle black coffee, with intense tannins, solid structure and a long, elegant finish. A classic Vintage, where the year and the degree tell the whole story together.

Ready for a classic to lay down? Explore our Vintage Port selection here!

The journey continues...

And so two more clues on the label fall into place. Next time you pick up a bottle, look at those two discreet numbers: the vintage tells you whether the wine is to drink now or to wait for; the alcohol content announces whether it comes light and fresh or warm and full-bodied. Together, they tell you half of what you need to know before you even pull the cork.