The most important first step is to only buy whole bean coffee. No storage of ground coffee can equal the job a coffee bean’s shell does in keeping flavor, freshness, and aroma locked in. Secondly, try to buy the amount of coffee you will consume in two weeks. At our home that is about three and a half pounds of beans.
The best way to store coffee beans is in an air tight container kept in a dark and cool place. A good investment is a crockery, stainless steel, or glass container that has an air tight seal.
The goal should be to keep the roasted coffee safe from moisture, air, light, and heat. Storing your coffee away from these elements will keep it fresh longer and assure excellent taste.
I have occasionally observed and heard of people storing coffee in their freezer. This environment accommodates the cool and dark needs but fails on the most important issue of avoiding moisture. In addition to picking up moisture, coffee can absorb the flavor of neighbors in the freezer like shrimp and pizza. Also, the process of roasting coffee beans causes a release of oils producing a coffee’s distinctive flavor. Freezing these oils can in effect eliminate the flavor.
Refrigeration of beans should never be done. Many of the same detrimental issues found in freezing will exist in refrigerating- except worse. Refrigerate your milk, your mocha in a bottle, maybe your white wine- but never your coffee beans
Buy whole beans that are fresh and recently roasted.
Store your coffee beans in an air tight container in a dark cool place.
Grind your beans just before brewing.
Bo Ryles, Clover Coffee Co