Green, unroasted coffee is far more stable than its roasted counterpart. Properly stored, green coffee stays fresh for about a year after harvest.

Keep it in a cool, dry place at stable room temperature, ideally between 60 and 70°F with moderate humidity. Many importers use hermetic bags inside jute sacks to protect against moisture and oxygen.

Over time, green coffee loses its brighter, more delicate flavors. Aged green coffee tends to taste flat, papery, or woody.

Roasted coffee releases carbon dioxide for several days after roasting, a process called degassing. This is why fresh coffee blooms when you pour hot water over it. After the initial degassing period, oxidation takes over—oxygen breaks down the aromatic compounds that give coffee its flavor.

Roasted coffee is at its best within 30 days of the roast date. It remains good for up to six months if stored properly, though complexity and brightness will fade gradually.

Store coffee in an airtight container at room temperature, away from direct sunlight. A cool, dark cabinet works well. Avoid storing coffee near the stove, in a sunny spot, or anywhere with temperature fluctuations.

Keep coffee in its original bag if it has a one-way valve and resealable closure—these bags let carbon dioxide escape while keeping oxygen out. Otherwise, transfer to an opaque, airtight container.

The refrigerator is not ideal. Coffee absorbs odors easily, and humidity inside a fridge can introduce moisture. Temperature changes when you remove the coffee also cause condensation.

Freezing is more nuanced. For long-term storage of coffee you won’t use for several weeks, freezing can preserve freshness. Divide coffee into single-use portions, seal in airtight bags, and freeze. When ready to use, remove a portion and let it come to room temperature before opening to avoid condensation. Don’t refreeze.

For everyday coffee you’ll finish within a few weeks, room temperature storage is simpler and works fine.

Whole bean coffee stays fresh longer than pre-ground. Grinding increases surface area, exposing more of the coffee to oxygen and accelerating staling. If possible, grind just before brewing.

If you buy pre-ground or grind in batches, use it within a week or two for best results.

Stale coffee lacks aroma when you open the bag. Fresh coffee should smell vibrant and distinct. During brewing, stale coffee produces little or no bloom. In the cup, stale coffee tastes flat, dull, or papery—lacking the brightness and complexity of fresh coffee.

Key Facts & Sources

• Roasted coffee begins off-gassing CO2 immediately after roasting; most degassing occurs in the first 24–72 hours.
• The four primary enemies of coffee freshness are oxygen, moisture, heat, and light — all accelerate staling.
• Pre-ground coffee loses roughly 60% of its aromatics within 15 minutes of grinding due to dramatically increased surface area exposure.
• The SCA recommends using roasted coffee within 30 days of the roast date for optimal flavor in filter brewing.