How to Keep Your Kombucha Warm in Winter

Estimated reading time: 4 minutes

How do keep you Kombucha warm in winter when the kitchen temperature falls? Here are some useful tips to keep your Kombucha warm & healthy all through winter.

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The ideal temperature to ferment Kombucha is 24 - 30 degrees Celsius or 75-85 degrees Fahrenheit. In this environment, Kombucha will usually take between 7-10 days to brew.

When a living organism is growing in less than ideal conditions it becomes weakened and is more susceptible to disease and death. Your SCOBY and kombucha brew is a living organism and needs to be kept within its "temperature comfort zone".

Signs your kombucha is too cold

Slow Fermentation

The first thing you will notice as the temperature drops is that your kombucha brew is taking longer to ferment. Each cycle may take a few days longer to brew. Eventually, it will seem as though the brew is just never going to ferment. When this happens the symbiotic relationship between the bacteria and yeast has stalled. The acidic nature of the Kombucha is slow to be produced which can lead to the next problem.

Mould Growth

The acidic levels of the Kombucha keep mould from forming in your brew. When the Kombucha is under stress and the fermentation is slow or stalled it is more likely to develop mould.

How do you know if your Kombucha is Warm?

We've established that Kombucha loves warm weather, a bit like me really, 24-30 degrees is also my ideal temperature. Unfortunately, my home drops to between 15-20 degrees throughout winter.

I know how cold it gets in my kitchen because when my booch was taking FOREVER to brew, I bought a strip thermometer to stick on the kombucha vessel. The thermometer is indispensable! It allows me to evaluate and monitor different heating methods. The thermometer is also useful in summer as my kitchen can get quite hot!

During the first winter, I tried many different ways to warm my Booch. I had success with the methods listed below until the very coldest of months. Once we were in the depths of winter I needed to "bite the bullet" and purchase a cheap heating mat. This winter, at the first sign of a slow kombucha yield I put the booch on its little warming mat.

If your house doesn't get as cold as mine you may find these tips are enough to keep your Kombucha happy all through winter.

Tips For Keeping Kombucha Warm in Winter

1. Sit the Kombucha on a warm appliance.
2. Relocate the brewing vessel to a warmer room in the house.
3. Place the kombucha in a high cupboard, these tend to be warmer as heat rises.
4. Wrap the brewing vessel in a towel and place in the high cupboard.
5. Wrap the brewing vessel in a towel and place in the high cupboard and add a hot water bottle.

What to do when it's still too cold to brew

1. Use a homebrew heating pad to keep it warm. These maintain a constant temperature depending on the size of the vessel. If the vessel is smaller than the recommended size you will need to elevate it off the pad slightly with egg rings. This is the one I use! It's also the cheapest on the market at $39.
2. Use a heating pad with a thermostat so it can set the pad to the desired temperature.
3. Seedling propagation mat, again you will need to monitor the actual temperate of the brew when you first start using the mat.
4. Kombucha heating strip by Kombucha Kamp is a specific product made for Kombucha brewers. I haven't used it but it looks good
5. Check out homebrew supplies for other fermentation aids. I haven't used a heating belt but this may also work for Kombucha.

I hope this article has helped you and you are able to continue to enjoying Kombucha throughout winter. If you're interested in more Kombucha articles take a look at these:

Adding Flavours to your Kombucha - F2

How to make Kombucha from scratch

Kombucha Recipe Chart Australian & US Measurements

If you have any other heating methods please feel free to leave your ideas in the comments section below or join us on our FB page for more discussions.

Would you like to know more? Check out my Kombucha Brewing eBook!