Should I keep coffee in the fridge?

No. A fridge is humid, not cold enough to slow staling much, and coffee readily absorbs other smells. Room temperature in an opaque airtight container is better, and a freezer is better still for long storage.

Can I freeze coffee beans?

Yes, for long storage, provided you freeze small sealed portions and take out only what you need. Repeatedly warming and re-freezing the same bag condenses moisture onto the beans.

How long do coffee beans stay fresh?

Whole beans kept airtight and dark are generally at their best within a few weeks of roasting. Ground coffee stales far faster, in hours to days, because so much more surface area is exposed to oxygen.

Why does very fresh coffee brew unevenly?

Freshly roasted coffee releases carbon dioxide vigorously, which can push water away from the grounds during the bloom. Many people find a bag brews more predictably after the first several days.

Air, light, time

Storing coffee without the myths

Coffee goes stale in ways that are worth understanding, and survives conditions that people worry about needlessly.

Carbon dioxide leaves roasted coffee quickly at first, then slowly. Very fresh coffee behaves differently in the same recipe, which is why a bag can seem to change for the first week.

Roast date beats best-before

A best-before date is set by the roaster's policy and tells you almost nothing. A roast date tells you where the coffee is in its life. If a bag carries only the first, you are being asked to trust a number that was chosen rather than measured.

Degassing, and why fresh can brew oddly

Roasting produces carbon dioxide, which leaves the bean quickly for the first days and then slowly for weeks. Very fresh coffee foams dramatically in the bloom and can brew unevenly as escaping gas pushes water away from the grounds. This is why many people find a bag hits its stride somewhere in the second week rather than on day one. It is a real effect and also a preference — CupTune is not telling you a correct age.

What actually causes staling

Oxygen, mostly, with heat, light and moisture accelerating it. The practical implications are boring and effective: keep beans in an opaque, airtight container at room temperature, away from the hob and the window. Buy quantities you will finish in a few weeks. Grind immediately before brewing, because ground coffee has vastly more surface area exposed to air and stales in hours to days rather than weeks.

The fridge and the freezer

The fridge is the bad one: it is humid, it is not cold enough to help much, and coffee readily takes on the smell of everything else in there. The freezer is genuinely useful for long storage, with one rule — freeze in small, properly sealed portions and take out only what you will use, because repeatedly warming and re-freezing a bag condenses moisture onto the beans each time. Many people grind straight from frozen without thawing.

What CupTune is not claiming

We have not run a controlled staling trial, and none of the above is a measurement of your coffee. Treat it as the standard practical account rather than a CupTune finding. For anything about food safety rather than flavour, FDA food storage guidance is the appropriate source, and roasted coffee stored dry is not the risk category that guidance is mainly aimed at.