Frozen food should be stored at -18°C (0°F) or colder. That single number does a lot of work. It’s the frozen food temperature recommended by Food Standards Australia New Zealand (FSANZ), and echoed by the USDA and FDA, and hitting it consistently is really what separates food that keeps well for months from food that slowly turns on you, in quality or in safety. Simple rule, but worth understanding properly.
What -18°C Actually Does
At -18°C, the activity of bacteria, yeasts and moulds effectively pauses. Harmful microorganisms such as Salmonella, E. coli and Listeria cannot multiply at this temperature, which keeps your food safe throughout its storage life.
Why -18°C Is the Magic Number
Freezing does not actually kill bacteria. Instead, it acts like a pause button, sending microbes into a dormant state. Once food thaws, those bacteria can wake up and multiply again, so maintaining a consistent frozen food temperature is essential.
Storing food at or below -18°C also slows down the enzyme activity and moisture loss that cause freezer burn, discolouration and off flavours. The colder and steadier your freezer, the longer your food retains its texture, taste and nutritional value.
Safe vs Quality: An Important Distinction
Now, something most people don’t realise. Food held continuously at -18°C stays safe to eat almost indefinitely. But safe and actually good to eat are two different things, and the gap between them widens over time. Quality drops off, even if safety doesn’t, and that’s the reason most frozen items come with a suggested use by window:
- Meat and poultry: 3 to 12 months
- Fish and seafood: 3 to 6 months
- Vegetables and fruit: 8 to 12 months
- Prepared meals: 2 to 3 months
How to Keep Your Freezer at the Right Temp
Keeping that frozen food temperature where it should be takes a bit of attention. Not much, but some.
- Use a freezer thermometer. Do not rely on the dial alone. Place a thermometer between packages to check the true reading.
- Avoid overpacking or underfilling. A well organised freezer keeps air circulating evenly.
- Limit door openings. Every opening lets warm air in and forces the unit to work harder.
- Cool food before freezing. Let cooked food reach room temperature first to prevent temperature spikes.
- Practise first in, first out. Label and date items so older stock gets used first.
Why Temperature Control Matters Beyond the Home
Step outside the kitchen and the stakes climb. For any business shifting fresh and frozen goods, holding a precise temperature the whole way through the journey isn’t optional. A break in the cold chain, even a short one, can undo everything. That’s the value of professional refrigerated transport and cold chain logistics, keeping products at the right frozen food temperature from pickup all the way through to delivery, with no gaps in between.
Final Thoughts
Set your freezer to -18°C or colder, check it regularly and store your food thoughtfully. It is a small habit that protects both your health and your grocery budget
Need reliable temperature-controlled storage and transport for your frozen goods across Australia’s east coast? Get in touch with Iannelli Bros to keep your cold chain running smoothly.
Frequently Asked Questions
How long can frozen meat last?
At -18°C or colder, frozen meat stays safe to eat almost indefinitely. The quality is a different story. For the best flavour and texture, use raw cuts within 3 to 12 months, mince within 3 to 4 months, and cooked meat within 2 to 3 months.
Can you refreeze defrosted meat?
Yes, but only if you thawed it in the fridge. As long as the meat stayed cold, at 4°C (40°F) or below, it’s safe to refreeze. Try to do it within 3 to 4 days.
Don’t refreeze meat that thawed on the counter, in warm water or in the microwave, unless you cook it first. And if raw meat has been sitting out at room temperature for more than two hours, throw it away.
Should you refreeze thawed meat?
It’s safe to refreeze raw meat, as long as it was thawed in the fridge at 4°C (40°F) or below and hasn’t been sitting out for more than two hours. The downside is quality. The meat can lose moisture and turn drier or tougher once cooked.
If you thawed it in the microwave or in cold water, cook it first before refreezing. And meat that’s been left on the counter for over two hours shouldn’t go back in the freezer at all.
Does freezing kill bacteria?
No. Freezing only pauses them. Bacteria like Salmonella and E. coli go dormant in the cold and survive down to -18°C and below. Once the food thaws, they can become active again and multiply. The only reliable way to kill them is thorough cooking.