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How Long Does an Open Bottle of Wine Last?

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  Published in Food and Wine on Wednesday, October 15th 2025 at 21:48 GMT by CNET
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How Long Does an Open Bottle of Wine Really Last? A Practical Guide

The question that keeps wine lovers, novice drinkers, and savvy foodies on their toes is simple: How long can you keep that open bottle of wine before it goes flat or develops off‑flavors? CNET’s in‑depth look at the issue pulls together science, expert advice, and everyday wisdom to give you a clear, actionable answer.

The Core Answer: Days, Not Minutes

• Red wine – 3 to 5 days
• White wine – 1 to 3 days
• Rosé – 3 to 5 days
• Sparkling wine – 1 to 2 days (often less)
• Fortified wine – 7 to 10 days

These ranges are based on a combination of lab studies and real‑world observations. The key takeaway is that most wines can survive a handful of days when stored properly, but the exact timing depends on several variables: the wine’s type, the cork or cap, and how you store it after opening.

Why the Numbers Vary

1. Oxygen Exposure

Wine is essentially a liquid that reacts slowly to oxygen. When you pop the cork, you open the bottle to the air in the room, and each time you pour, you introduce a little more oxygen. The longer the bottle stays open, the faster the wine oxidizes, turning bright reds into dull brown and crisp whites into nutty, sour drinks.

2. Cork vs. Screwcap

A cork’s ability to seal itself after each pour matters. A cork can shrink slightly when the bottle is sealed again, but it won’t reseal as tightly as a screwcap. That’s why wines with screwcaps often stay fresher longer after opening. CNET notes that in controlled tests, screwcapped bottles maintained their original bouquet up to two days longer than cork‑sealed counterparts.

3. Storage Temperature and Light

Storing wine in a cool, dark place slows oxidation. A refrigerator (or a wine cooler) is ideal. Even in a refrigerator, however, a bottle should be kept upright to keep the cork moist and prevent it from drying out and letting more air in. Light can degrade certain compounds, especially delicate rosés and whites.

4. Residual Sugar and Acidity

Sweet and high‑acidity wines resist spoilage better. Fortified wines—like port and sherry—have added alcohol that acts as a preservative, letting them last up to a week or more. Conversely, dry whites tend to “turn” quicker because they lack the protective sugars.

Real‑World Testing: The Purdue Study

CNET highlights a 2015 Purdue University experiment that measured how long various wines stayed drinkable after opening. The researchers used a simple method: they sealed bottles with a vacuum pump and monitored flavor changes over days. The findings confirmed the general timeline above and underscored the power of vacuum sealing to extend a wine’s life by up to 50 % compared to a standard cork seal.

The study also tested a commercial preservative—BHT (butylated hydroxytoluene)—a common antioxidant found in some wine‑preserving sprays. While the spray did slow down the oxidation, CNET’s editors cautioned that BHT has an off‑taste at high concentrations and is not recommended for casual home use.

Practical Tips for the Home

When the Wine Is Gone

If you’re unsure whether a bottle is still good, look for subtle clues:

• Taste: A sour, metallic, or “burnt” flavor indicates oxidation.
• Appearance: A dull, brownish hue in a red wine suggests aging.
• Headspace: A large amount of gas in the bottle is a sign the wine is over‑oxidized and ready to drink before it turns to vinegar.

When in doubt, taste a small amount. If it’s still pleasant, it’s probably safe to finish. If it’s unpleasant, it’s best to discard it.

Takeaway

An open bottle of wine isn’t a ticking time bomb. With proper storage—especially a good seal and a cool environment—you can keep most wines drinkable for several days. Red and rosé have the longest shelf lives; sparkling and fortified wines have the shortest, so serve them soon after opening. If you love to keep a bottle from going to waste, consider investing in a vacuum pump or a wine preservative spray for those extra days of enjoyment.