The short answer
To keep coffee beans fresh, protect them from air, light, heat and moisture. Store whole beans in an airtight, opaque container at room temperature, away from the oven and window, and grind just before brewing. Avoid the fridge. Used this way, beans stay at their best for a few weeks after roasting.
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The four enemies of fresh coffee
Coffee is at its best soon after roasting, and four things steal that freshness: air, light, heat and moisture. Manage all four and your beans reward you for weeks. Ignore them and even great beans go flat and dull within days.
Do this
- Keep beans whole and grind only what you need, right before brewing.
- Use an airtight, opaque container with a good seal.
- Store at a steady room temperature in a cupboard, away from heat and light.
- Buy in amounts you will finish within a few weeks.
Avoid this
Do not store coffee in the fridge. The temperature swings cause condensation, and coffee readily absorbs the smells around it. The freezer can work for long-term storage in a truly airtight container, but for everyday use, a cool, dark cupboard is best.
Freshness you can taste
Whole beans hold their aroma far longer than pre-ground coffee, because grinding exposes far more surface to air. A burr grinder at home is the single biggest upgrade for most people.
Start with beans that are fresh to begin with.