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Whole coffee beans usually keep their best flavor for about 2 to 4 weeks after roasting when they are stored in an airtight container, kept away from light, heat, and moisture. They do not suddenly become unusable after that point, but the aroma and cup quality start to fade more noticeably. That is why an airtight canister matters so much.

Coffee beans do not suddenly go bad in one day, but they do lose freshness step by step. The moment roasted beans are exposed to air, light, heat, and moisture, their aroma begins to fade. That is why storage matters so much. If the beans are kept in an airtight container, they usually stay fresher for longer and hold their flavor better than beans left in an open bag or a loosely closed jar.