- The answer to the question ? How long does whiskey last? is a matter of quality, not safety, assuming proper storage conditions - when properly stored, a bottle of whiskey (whisky) has an indefinite shelf life, even after it has been opened.
To maximize the shelf life of whiskey for quality purposes, store in a cool dry area away from direct heat or sunlight; keep tightly closed when not in use.
Once a bottle of whiskey is opened, the contents may begin to evaporate slowly and some flavor may be lost over time, but the whiskey will remain safe to consume if it has been stored properly.
How to tell if whiskey has gone bad? The shelf life of whiskey is indefinite, but if whiskey develops an off odor, flavor or appearance, it should be discarded for quality purposes.
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