Yes, wine can go bad, though not usually in a way that will hurt you. A bottle can be corked, oxidized, or simply past its prime, and each one has telltale signs. The good news is that once you know what to smell and taste for, spotting a turned bottle takes about ten seconds.
Let us clear up the biggest fear first. A wine that has gone bad will taste unpleasant, but it is not dangerous the way spoiled food is. The worst outcome is a wasted glass and a little disappointment. Wine that has turned to vinegar is just that, mild vinegar, and your nose will warn you long before you swallow.
What does a corked wine smell like?
Cork taint is the classic fault, and it comes from a compound in the cork, not from bits of cork floating in your glass. A corked wine smells like a wet dog, a damp basement, or soggy cardboard. The fruit goes flat and muted, as if someone turned the volume down on the wine.
Corked wine is not your fault and not the shop's fault. It is a lottery of natural cork, and it happens to a small share of bottles. If you open something and it smells musty and lifeless, that is almost always cork taint. It is harmless to drink, but there is no reason to. It will never taste good.
How do I know if a wine is oxidized?
Oxidation happens when a wine gets too much air, either from a bad seal or from sitting open too long. Oxygen is a wine's friend for a few minutes and its enemy over days.
- The color shifts. Whites turn deep gold or brown. Reds go brick or brownish and lose their brightness.
- The fruit fades and the wine starts to smell nutty, like bruised apple, sherry, or stale nuts.
- The whole thing tastes tired and flat, missing the freshness it should have.
A little of this is normal in a very old wine and can even be pleasant. In a young wine that should be fresh, it means the bottle is done.
What about a wine that smells like vinegar or nail polish?
A sharp, vinegary smell, sometimes with a whiff of nail-polish remover, points to volatile acidity. The wine has taken on too much acetic acid and is heading toward vinegar. In tiny amounts it can add lift, but when it jumps out of the glass and stings your nose, the bottle has turned.
Is sediment or a stained cork a bad sign?
Usually not, and this trips people up. Some harmless signs get mistaken for spoilage all the time.
- Sediment in older reds is completely normal. Just pour gently or decant off it.
- Tartrate crystals, the little clear or red crystals on the cork or bottom, are natural and harmless. They are a sign of a wine that was not overly processed.
- A stained cork where wine has crept up the side is normal. A cork pushed up or leaking heavily is more of a warning.
How long does an opened bottle last?
Once open, most wines are best within a few days. Recork them and keep them in the fridge, even the reds, since cold slows the oxidation down.
- Sparkling wine: one to three days with a proper stopper.
- Light whites and roses: two to four days.
- Full reds: three to five days.
- Fortified wines like Port: weeks, sometimes longer.
These are rough guides. Trust your nose over any timeline. If it still smells fresh and tastes good, it is good.
How do I keep a bottle from turning in the first place?
Store bottles on their side or upright in a cool, dark, steady spot away from heat and sunlight. The real enemies are heat and big temperature swings, which age a wine fast and unevenly. A closet works far better than a rack above the stove or a sunny windowsill.
When you are choosing what to open next, buying from a shop that stores its wine properly matters more than most people realize. We keep our small-production bottles cool and out of the light, so what you taste at home is what the winemaker intended.
Want something fresh and cared-for to open tonight? Browse everything we carry and pour with confidence.
