- How long does beer last once opened? The precise answer depends to a large extent on storage conditions — to maximize the shelf life of opened beer, keep it refrigerated and tightly covered.
How long does opened beer last in the refrigerator? Beer that has been continuously refrigerated will generally stay at best quality for about 1 day.
Is opened beer safe to drink after the "expiration" date on the package? Yes, provided it is properly stored and the package is undamaged - commercially packaged beer will typically carry a " Best By," "Best if Used By," "Best Before", or "Best When Used By" date but this is not a safety date, it is the manufacturer's estimate of how long the beer will remain at peak quality.
How to tell if opened beer is bad? If beer develops an off odor, flavor or appearance, it should be discarded for quality purposes.
Sources: For details about data sources used for food storage information, please click here