Should Coffee Beans be Refrigerated?

Trying to keep your coffee beans fresher for longer is a goal for most coffee lovers because fresh is always better. Not only will your cup of coffee taste better, but the aroma from freshly ground coffee beans is also sought after. You may have heard that keeping your coffee beans in the refrigerator will help them stay fresh, but is this true?

Should coffee beans be refrigerated? No, you should not store coffee beans or ground coffee in a refrigerator. Not because the cold, dark fridge will do something terrible to your coffee, but it simply won’t keep them fresher longer. But, what about the freezer?

Before we talk about storing your coffee in the freezer, let me explain why refrigeration of coffee beans isn’t something you want to do. Let’s say you put your coffee beans in a fridge with the leftover dinner from the night before. There could be some cross-contamination of smell or taste. I think you would agree no one wants their coffee smelling or tasting like the garlic chicken they had last night.

Coffee beans should be kept in a resealable, airtight container like a food container or even a ziplock bag and stored in a dry, dark place. Now, let’s get back to keeping them in the freezer. Coffee beans can be put in the freezer. We’ll discuss why later in the article.

What Affects the Freshness of Coffee Beans?

The most significant effect on the freshness of your coffee beans is air, light, and moisture. Air (primarily oxygen) makes coffee beans lose freshness quickly.

This is why many big coffee roasteries will do something called “nitro-flushing.” This process involves flushing the bags of coffee beans with nitrogen to remove as much oxygen as possible and then sealing the bag to keep the beans fresher for longer. If you’re worried by the sound of nitro-flushing, don’t be, it’s perfectly normal. Nitro-flushing is highly preferred for freshness over using preservatives.

Second on the list is light. Sunlight especially makes coffee lose its freshness quicker. Coffee will lose its freshness (go stale) as time passes anyway, but both light and moisture will speed up this process. As freshness lessens, that delicious smell will become less pungent, and the flavors will become less intense.

Also, new, less tasty flavors will start to develop. Once this happens, you will have stale coffee beans. When you make a coffee with them, it will taste flat, woody, and papery. And for those lovers of dark roast coffees, unfortunately, they tend to go stale quicker than lighter roast coffee. This is because it’s more permeable, so air can get to it more easily.

Does the Same Apply to Ground Coffee as Coffee Beans?

Yes and no. Yes, all the above factors will have the same negative effects on the freshness of your ground coffee. However, ground coffee will lose freshness much quicker than beans. This is because there is more surface area exposed to the air. 

This is why coffee roasters often recommend their customers get coffee grinders and freshly grind coffee when they need it. It will be fresher and, therefore, taste better. If you want to learn the proper way to grind your coffee or how fine you should grind your coffee, click the link. 

Where to Store Coffee Beans?

With all the above factors in mind, we want to limit as much air, light, and moisture as possible. So, if you’ve bought a bag of coffee, chances are it will be in an airtight bag. Before you open it, be sure t store it in a dark, dry place like a cupboard.

Once you open it, if the bag can be resealed, great, just keep it in that and in the cupboard and you are good to go. If you cannot reseal the bag, transfer all the coffee into an airtight container – a Tupperware, or even a ziplock bag will be adequate. If you are looking for something a little nicer and easy to use, you can buy canisters specifically designed to keep your coffee in. Below are some of the ones I use and love.

How Long do Coffee Beans Stay Fresh?

There are two parts to this answer. How long do they stay fresh before you have opened the (airtight) bag? And, how long will they stay fresh after you’ve opened them?

Before you’ve opened the bag, this is a tricky one. I have two bags of coffee in my house right now. One I bought from a supermarket, it has a best before date of a year from now. The second I got from a specialty coffee roaster, it has a roasted date of 3 days ago (they roasted it the day I ordered it, then shipped it out, and it arrived two days later. Impressive, right!) This bag states, “best enjoyed within three months.” 

I have a friend who roasts coffee for a supermarket, and I asked her why the supermarket coffee had a longer best before date on it. It’s a combination of reasons. First, coffee is classed as an ambient product, meaning processed. Ambient products can be bought in larger quantities and stored longer because they last longer and don’t require refrigeration. 

So the supermarkets need the coffee roasters to put long shelf lives on them. Will it taste as good in a year? No, even in an airtight bag, it will have lost freshness. Will it harm you? Other than possibly offending your taste buds, no. 

So, why does specialty coffee have a 3-month shelf life? Three months is the time when it will taste best. After three months, even if the bag is unopened, the aromas may start to be lost, and the woody flavors start to appear. In an ideal world, I would drink my coffee within a month of being roasted, but there is a catch, I wouldn’t want to drink it the day after it was roasted.

After you’ve opened the bag, I recommend using coffee beans within the first three months after being opened from their bag, even if stored in an airtight container. But some people will say if you use within the first six months after opening then you’re good. Even then though, you will still lose some of the taste and aroma.  

Don’t Use Beans the Day After Being Roasted

You may think I’m being ridiculous now, and perhaps I am, but if we’re talking about coffee freshness, you may as learn about resting coffee.

To keep it short, when coffee is roasted, chemical reactions occur and cause carbon dioxide to be released from the coffee beans. A lot of this can’t escape from inside the beans right away. In the first few days after roasting, the coffee still releases quite a bit of carbon dioxide, but this will begin to slow down.

This is the purpose of those tiny valves on the bag. So, let the coffee rest for 3 – 5 days after it’s been roasted to hit that sweet spot of maximum coffee deliciousness.

Should you Freeze Coffee Beans?

Finally, we’ve come to why coffee beans can be stored in the freezer. Freezing the beans will lock in the flavors and keep the coffee in the same condition as it was only a handful of days after roasting it. If you’ve found yourself in an accidental bulk-buy-coffee situation (we’ve all been there), you can put your coffee beans in the freezer. Still, keep them in an airtight container, and only get out as much as you need each time.

Many people recommend you defrost them overnight, but I’ve also seen baristas chuck frozen beans straight into their grinder with no problems. Recently freezing coffee beans has been a hot topic, so if you want to know more, look up Manchester Coffee Archive, they are the frozen coffee experts.

Final Thoughts

A quick rundown to coffee bean storage tips:

  • Do not refrigerate.
  • Store in an airtight container, in a dry, dark place.
  • Rest for at least 3 days and drink within 3 months.
  • If you’re not going to use your beans within 3 months, get them in the freezer.
  • If you’re drinking year old coffee and enjoying it, it’s not harming you, feel free to ignore everything in this post – the only thing that really matters is like what’s in your cup!
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