Moving a Wine Collection Safely: Expert Tips

Moving a wine collection safely comes down to stable, cool temperatures, minimal light exposure, controlled humidity, and reduced vibration. Each of those protects your bottles' integrity. Excessive temperatures can rapidly age wine and induce faulty flavors, as Marais (1986) and Ough (1986, 1992) observed. The danger zone is above 25°C for long periods or 40°C for short periods. Light exposure, especially direct sunlight, can create "lightstruck" flavors through volatile sulfur compounds, according to the AWRI. Maintaining relative humidity between 55% and 75% is crucial. It prevents corks from drying out and allowing oxygen ingress, while avoiding label damage from excessive moisture, as Climate Controlled Wine Storage notes. Minimizing vibrations is also vital. A study by Chung et al. (2008) suggests that vibrations can accelerate wine aging and negatively affect quality. Careful planning around these environmental factors ensures your collection arrives in optimal condition. For more on how to protect your wines, see our guide on how to store wine.

How do temperature extremes affect wine during transit?

Temperature control is a critical consideration for wine storage and transport. Wine is highly susceptible to temperature changes. Excessive storage temperatures have a marked effect on the shelf life of bottled wine. The AWRI states that they lead to rapid aging and significant deterioration. Marais (1986) observed faulty flavors and decreasing overall quality after 12 months of wine storage at 30°C. Temperatures exceeding 40°C can induce visual and sensory changes in a wine in only a matter of days, Ough (1986) found. In general, any storage place where the temperature exceeds 25°C for long periods and 40°C for short periods can affect wine quality, Ough (1992) noted.

Conversely, wine exposed to temperatures that are too cold can freeze and expand. That can push out the cork or crack the bottle, which then allows more oxygen exposure. Hirlam (2019a,b) recommended avoiding thermal cycling where the temperature varies significantly. Such fluctuations can cause wine leakage or cork movement due to thermal expansion. The AWRI explained that this affects appearance and marketability, even if quality is not necessarily compromised.

A study by Chanut et al. (2023) tested microagglomerated cork stoppers in model wine. Oxygen barrier properties of the cork alone remained unchanged over 24 months at 20°C. Higher temperatures, though, significantly impacted the glass-cork interface. At 35°C, a temperature "easily reached during bottle shipping," a significant oxygen transfer at the glass-cork interface began after 9 months of storage. At 50°C, this shift occurred within the first 3 months. Total oxygen transfer approached that of oxygen in the air after 6 months, indicating leakage, Chanut et al. (2023) found. This underscores the importance of maintaining stable temperatures during transit and storage, especially for which mature wines travel worst, per our maturity data.

What are the ideal temperature ranges for wine storage and transport?

Most experts recommend keeping wine at constant temperatures between 10°C and 15°C (50°F and 59°F), according to Jancis Robinson. Tom Stevenson speculates that 11°C (52°F) may be the most ideal temperature for storage and aging. Karen MacNeil recommends a constant temperature around 13°C (55°F) for wine intended for aging. Both. The Comité Champagne recommends storing bottles at a constant temperature of between 10°C and 15°C.

Amon and Simpson (1986) recommend storing bottled wine with the cork in contact with the wine. The location should be cool (15-20°C) and dry, as the AWRI cites. Wine can be stored at temperatures as high as 21°C (69°F) without long-term negative effect. A view from Professor Cornelius Ough of the University of California, Davis. He believes wine can be exposed to temperatures as high as 49°C (120°F) for a few hours without damage. However, a wine has a greater potential to develop complexity and a more aromatic bouquet if it ages slowly in a relatively cool environment. Lower temperatures lead to slower development. The rate of chemical reactions in wine doubles with each 10°C (18°F) increase in temperature.

How does light exposure impact wine quality during a move?

Light exposure can significantly affect wine quality. It leads to the production of volatile sulfur compounds known as "lightstruck" flavor, which the AWRI summarizes. Direct sunlight or incandescent light can adversely react with phenolic compounds in wine. That can create "wine faults," changing its flavor and aroma. Light-bodied white wines are most vulnerable to light exposure and are often packaged in tinted bottles for protection. Wines in clear, light green, and blue bottles are the most susceptible and may require extra precautions during storage.

Dozon and Noble (1989) found that still and sparkling white wines in green glass developed a statistically significant lightstruck flavor after 31.1 hours and 18 hours of exposure to fluorescent lamps, respectively. The same wines in clear glass developed this off-flavor after only 3.3 hours and 3.4 hours, respectively, as the AWRI cites. The intensity of fluorescent lamps is significantly less than sunlight. Direct sunlight provides 4286 times the amount of UV-A radiation as a 36 W fluorescent lamp with 400 lux illuminance, according to Gordon Watson. Bottled wine can meet direct sunlight in retail window displays. That exposure is likely more deleterious to wine quality than exposure to electric lighting systems, the AWRI concludes. To protect wine from direct light in a cellar, bottles are often stored in corrugated boxes or wooden crates. The Comité Champagne also states that bottles must be protected from light.

Why is humidity control important when moving wine?

Humidity control is important to prevent corks from drying out and to protect labels. Some degree of humidity is required to keep wines with cork enclosures moist. A dry cork can allow oxygen to enter the bottle, filling the ullage space and possibly causing spoilage or oxidation. The AWRI notes that wines under natural closures can dry out, and leakage can occur if the air is too dry.

However, excessive humidity can damage wine labels, hindering identification or hurting potential resale value. Jancis Robinson notes that 75% humidity is often cited as ideal. There is "very little significant research to definitively establish an optimal range." Climate Controlled Wine Storage maintains moderate humidity levels between 55% and 75%. That avoids these problems and assists in optimum wine development. The Comité Champagne recommends high and constant humidity, between 60% and 80%. Tom Stevenson recommends against keeping wine in a refrigerator. The refrigeration process often includes dehumidifying, which can quickly dry out corks.

Does bottle orientation matter during transport and storage?

For most wines, storing bottles on their side is a common practice. This allows the cork to stay moist through constant contact with the wine. However, research in the late 1990s suggested that a slight angle is ideal. That angle allows partial cork contact with the wine while keeping the ullage air bubble at the top. It may lead to slower, more gradual oxidation and maturation. If a wine lies completely on its side, temperature variations can eject wine through the cork, repeatedly introducing oxygen.

For Champagne and other sparkling wines, upright storage is often recommended. The internal pressure from trapped carbonic gas provides sufficient humidity and oxygen protection. The Comité Champagne notes that bottles can be stored upright or on their sides. It still recommends storing Champagne on its side in a cool, dark, draft-free place with generous humidity. It cites that Champagne is ready for drinking upon release. Caterer Magazine claimed that a CIVC study found Champagne stored on its side aged more quickly. Oxygen seeped in after corks lost elasticity due to contact with the wine. The Comité Champagne's current guidance still advises side storage. For more on Champagne, explore our Champagne producer atlas.

A study by Chanut et al. (2023) also tested storage position on microagglomerated cork stoppers in model wine. Vertical storage puts the cork in contact with the vapor phase, and horizontal storage puts it in contact with the liquid phase. Neither position significantly influenced oxygen transfer through the cork or the glass-cork interface over a 24-month period at 20°C. This finding aligns with Lopes et al. (2006) and Hirlam et al. (2019), who reported no significant effect of storage position on oxygen transfer or similar oxygen transmission rates, respectively, as Chanut et al. (2023) cite.

How do vibrations affect wine during transport?

Vibrations during transport can impart sensory modifications to wine, as recent studies have shown, according to Chanut et al. (2023). Anecdotal information regarding the contributions of vibration in wine storage states that it contributes to the accelerated aging of wine with adverse effects. This remains a research area with relatively little data. A study by Chung et al. (2008) found that vibrations of different frequencies had distinct effects on wine chemistry. The study 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." The Comité Champagne states that bottles must be protected from vibrations.

What are the signs of heat damage in a wine collection?

Identifying and demonstrating that a wine has been damaged by exposure to temperature extremes can be difficult. Results depend mostly on the degree of damage and the age of the wine, the AWRI explains. The AWRI cites Robert Parker (2008) on the scale of the problem. He suggests that somewhere between 10% and 25% of wines sold in the USA have been damaged due to exposure to extreme heat.

Visual assessments are a key method for assessing heat damage. Check for signs of leakage, closure damage, wine travel or seepage on corks, increased ullage, and label damage, the AWRI states. For more on fill levels, consult our guide on wine ullage levels explained. For white wines, chemical analysis includes color development (yellow/brown color measured by OD420) and free and total SO2 levels. For red wines, chemical analysis includes spectral measurements for color and phenolics, as well as free and total SO2 levels, the AWRI details.

Sensory analysis typically involves assessment of two dozen of the damaged stock compared to two dozen of the same wine not exposed to the extreme conditions. Wines exposed to extreme temperatures tend to lose their fresh fruity characters and show more developed fruit characters. At extreme levels of temperature exposure, oxidized and cooked characteristics can be observed, the AWRI reports. The AWRI recommends retaining hold-back samples stored under known conditions for comparison in case of problems.

Who is responsible for wine damage during transport?

Responsibility for wine damage during transport depends on the contract terms. The two are Free on Board (FOB) and Cost, Insurance and Freight (CIF), according to the AWRI.

Contract Type	Exporter's Responsibility	Buyer's Responsibility	Liability Ceases For Exporter
FOB (Port of Shipment)	Deliver consignment to ship at port of shipment, bear all costs incurred in doing so.	Cost of freight, insurance, and all charges thereafter until arrival at buyer's warehouse.	When goods pass the ship's rail.
CIF (Port of Discharge)	All costs in FOB contract plus ocean freight and insurance.	All costs beyond the point where liability ceases for the exporter.	When goods pass the rail at destination.

This table summarizes the ownership and responsibility during transport, as the AWRI outlines. The AWRI recommends that wine producers obtain independent advice regarding legal contracts and liability prior to and after packaging. Understanding these terms is crucial when considering how to sell fine wine or how to buy wine at auction.

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