Ground coffee that has been opened has a shelf life of 2 to 3 weeks. In order to maximize the shelf life of ground coffee and maintain its freshness, it should be stored in an air-tight container.
Ground coffee that has been vacuum sealed can be safely stored for 5 to 6 months. Freezing vacuum-sealed coffee also extends its shelf life.
Frozen coffee should be allowed to come to room temperature before it is brewed. For best results, it is recommended that coffee not be stored in the refrigerator.
Storage containers that are glass or ceramic are best suited for storing coffee and maximizing its shelf life.