While a few days in the fridge is unlikely to affect Champagne, extended periods of time at cold temperatures can mute the flavors and aromas, diminishing its quality.

The fridge effect happens when the dry air inside the refrigerator dries out the cork. A dry cork can shrink and allow air to seep into the bottle, which can oxidize the Champagne.

Champagne is best when stored in a cool, dark place with a consistent temperature between 50 and 55 degrees Fahrenheit. A wine cellar or dedicated wine fridge is perfect for this.

Storing it upright in the fridge is okay if it's just a few days before you pop the cork. If you are storing it long-term, place it in a dark closet or basement on its side.