Instant coffee (freeze dried) lasts for: Ground coffee stored in the freezer should taste great even one to two years beyond the best by date. Whole Bean Coffee Vs Ground Coffee Lets Break It Down In the cupboard, your ground coffee beans will last for about three months opened or unopened. How long does ground coffee last unopened . If you put it in a freezer you’ll lose some flavor but get up to two years out of it. If you haven’t opened your canister or bag of ground coffee it will last longer than this, but the freshness will start to degrade after some time. How long does ground coffee last? Once you open the bag, your coffee should maintain decent flavor for up to two weeks. Instant coffee (freeze dried) lasts for. In general, an unopened package of ground coffee stored in the pantry will retain the best taste three to five months beyond the best by date. An unopened pack of coffee ground stored under proper conditions (pantry) can be used 3 to 4 months afte...