How Long Does Wine Last Once Open? Understanding Spoilage

How long does wine last once open? It depends primarily on exposure to oxygen and the temperature at which it is stored. Once a bottle is opened, the wine's interaction with oxygen accelerates. That leads to changes in its sensory properties. The Australian Wine Research Institute highlights that excessive storage temperatures significantly impact wine's shelf life. Conditions above 25°C for extended periods, or 40°C for brief durations, are known to affect quality (Ough 1992, cited by AWRI Technical Note TN09). For sparkling wines, the Comité Champagne states that an opened bottle "won't keep for long," even when sealed with a dedicated stopper cap and kept cool. Precise day-by-day durations for various wine styles are not widely published in available research. The fundamental principle for preservation remains consistent: minimize oxygen contact and maintain a cool, stable environment. Wine preservation systems using nitrogen gas are specifically designed to prevent oxidation and premature spoilage. Those systems extend the life of an open bottle.

What causes wine to spoil once open?

The primary driver of spoilage in open wine is oxygen. The detrimental effects of excessive oxygen exposure are well established (Chanut et al.). When wine oxidizes, it can lose its fresh, fruity characteristics and develop less desirable qualities. The Australian Wine Research Institute (AWRI) notes that wines exposed to extreme temperatures tend to lose their fresh fruity characters. Those wines also show more developed fruit characters. At extreme levels of temperature exposure, oxidised and cooked characteristics can be observed (AWRI).

Beyond oxidation, light exposure can also affect wine quality. The AWRI states that "Light exposure can affect the taste of a wine through the production of volatile sulfur compounds, known as ‘lightstruck’ flavour" (AWRI). Research by Dozon and Noble (1989), cited by AWRI Technical Note TN09, tested still and sparkling white wines bottled in green glass. Exposed to fluorescent lamps, those wines developed a statistically significant level of lightstruck flavour after 31.1 hours and 18 hours, respectively. The same wines in clear glass developed this off-flavour much faster, after only 3.3 hours and 3.4 hours. Light-bodied white wines face the greatest risk from light exposure.

How does temperature affect open wine?

Temperature plays a critical role in how quickly an open wine will degrade. Excessive storage temperatures have a marked effect on wine's shelf life (Marais 1986, cited by AWRI Technical Note TN09). Temperatures exceeding 40°C can induce visual and sensory changes in a wine. Those changes appear in only a matter of days (Ough 1986, cited by AWRI Technical Note TN09). More generally, a storage place above 25°C for long periods can affect wine quality. The same applies above 40°C for short periods (Ough 1992, cited by AWRI Technical Note TN09). Marais (1986), cited by AWRI Technical Note TN09, stored wine at 30°C for 12 months. That test showed faulty flavours developing and overall quality decreasing.

The rate of chemical reactions in wine roughly doubles with each 18°F (10°C) increase in temperature. This means that warmer temperatures accelerate the processes that lead to spoilage. For long-term storage of sealed bottles, experts like Jancis Robinson recommend constant temperatures between 50 and 59°F (10 and 15°C). Tom Stevenson speculates that 52°F (11°C) may be ideal. Karen MacNeil recommends keeping wine intended for ageing in a cool area with a constant temperature around 55°F (13°C). These recommendations are for sealed bottles. The principle of cooler, stable temperatures slowing degradation applies to open wines as well. Amon and Simpson (1986), cited by AWRI Technical Note TN09, recommend storing bottled wine in a cool (15-20°C), dry location.

Temperature swings can also cause adverse chemical reactions. Repeatedly moving a wine from a warm room to a cool refrigerator is one example. Chanut et al. also studied microagglomerated cork stoppers in miniaturized bottle systems with model wine. That research found that high storage temperatures can compromise the integrity of the seal. At 35°C, the total oxygen diffusion coefficient sharply increased after 9 months. At 50°C, a tremendous oxygen transfer occurred at the glass-cork interface from 3 months. It eventually approached the diffusion coefficient of oxygen in the air after 6 months, indicating leakage (Chanut et al.). Even with a stopper, then, high temperatures can undermine preservation efforts by affecting the closure itself. For more on ideal storage conditions, see our guide on how to store wine.

Do preservation methods extend the life of open wine?

Yes, various methods aim to extend the life of open wine by limiting oxygen exposure or maintaining optimal conditions. For sparkling wines, the Comité Champagne advises sealing an unfinished bottle with "a stopper cap, specially designed for storing sparkling wines." The advice is then to place it in a cool place. "Wine preservation and dispensing systems have also been developed that store wine at their optimal temperatures and use nitrogen gas to dispense the wine." Nitrogen gas helps prevent wine from oxidation and premature spoilage.

Here is a comparison of common preservation methods:

Method	How it works	Impact on oxygen	Impact on temperature
Stopper cap (sparkling)	Seals bottle neck to retain pressure	Prevents gas escape/ingress	No direct impact
Nitrogen gas system	Dispenses wine using nitrogen gas	Prevents oxidation	Stores at optimal temperatures
Refrigeration	Cools wine	No direct impact on oxygen ingress, but slows reactions	Maintains cool temperature, but can dehumidify corks

The effectiveness of a stopper can be influenced by the wine itself and the storage conditions. Chanut et al. studied microagglomerated cork stoppers (Diam 5) in miniaturized bottle systems with a model wine solution (12.5% ethanol, pH 3.5). That study found that the oxygen diffusion coefficient of the stopper alone was not modified by storage conditions over 24 months. However, the total oxygen transfer, which includes the glass-cork interface, was significantly higher in the presence of model wine at 20°C after three months of storage. The interface accounted for nearly 70% of the total oxygen transfer (Chanut et al.). So the interface between the cork and the glass is a major pathway for oxygen entry, even with a stopper. For a detailed look at various tools, explore our comparison of Coravin, pump and gas compared.

Does bottle orientation matter for open wine?

For an open bottle of Champagne, the Comité Champagne explicitly states, "It can be placed upright or on its side, either way won’t have an impact on the wine." This simplifies storage decisions for sparkling wines once they have been opened and resealed with a proper stopper.

For still wines, traditional advice often suggested horizontal storage to keep the cork moist. However, Chanut et al. tested microagglomerated cork stoppers in miniaturized bottle systems containing model wine. They compared two storage positions: vertical, with the cork in contact with the vapor phase, and horizontal, with the cork in contact with the liquid phase. Position "did not modify the oxygen transfer" over a 24-month aging period at 20°C. That suggests orientation had no significant influence on oxygen transfer for this specific type of cork and model wine. The finding covers both the cork itself and the glass-cork interface.

A debate regarding sealed Champagne storage. Some recommendations favour upright storage, because internal pressure provides humidity and oxygen protection. However, we also cite the Comité Interprofessionnel du Vin de Champagne (CIVC) as still recommending storing Champagne on its side for long-term storage. That advice assumes "generous humidity" and a "Constant, low ambient temperature (around 10 °C/50 °F." This conflicting advice for sealed Champagne underscores the importance of specific guidance for open bottles. For open bottles, the Comité Champagne's advice on upright or side storage is clear. You can learn more about bottle condition in our guide to wine ullage levels explained.

What about light and vibration for open wine?

Light and vibration are typically discussed in the context of long-term storage for sealed bottles. Their impact on wine quality is universal and extends to open bottles as well.

Light exposure can cause significant damage to wine. The AWRI warns that "Light exposure can affect the taste of a wine through the production of volatile sulfur compounds, known as ‘lightstruck’ flavour" (AWRI). This off-flavour can develop quickly, particularly in light-bodied white wines. Those wines are being at the greatest risk. Dozon and Noble (1989), cited by AWRI Technical Note TN09, also tested still and sparkling white wines in clear glass bottles. Those wines developed lightstruck flavour after only 3.3 to 3.4 hours of exposure to fluorescent lamps. Wines in green glass offered slightly more protection, but still developed the fault after 18 to 31.1 hours. Keep open wine away from direct light, whether natural or artificial. That is a prudent measure to preserve its quality.

Vibration is another factor that can negatively impact wine. We cite a study by Chung et al. (2008) which concluded that "Vibration could be used to accelerate the ageing of wine, but in most cases, this may lead to negative effects on wine quality. Therefore, to store red wines with limited changes in physicochemical properties, vibrations should be minimized." This study focused on sealed red wines. The principle that vibrations can accelerate chemical changes, and potentially degrade wine quality, applies to open bottles as well. Storing open wine in a stable, vibration-free environment helps to maintain its integrity.

Knowing when to open your wines at their peak is essential for enjoying your collection. Access our exclusive drink-window data for your cellar to make informed decisions.