Food Temperature Log Guide --- Legal Temps, Proper Records

The Food Safety and Hygiene (England) Regulations 2013 and equivalent legislation in Scotland, Wales, and Northern Ireland set out specific temperature requirements for food storage, cooking, and holding. These are not guidelines — they are legal requirements enforced by EHO inspectors during every visit.

The frequency of temperature checks depends on the type of equipment and how critical it is to food safety. Here are the industry-standard monitoring frequencies that EHO inspectors expect:

Fridges: at least twice daily. Once at opening (or start of shift) and once at closing (or end of shift). The opening check confirms the fridge held temperature overnight. The closing check confirms it's maintaining temperature during the busiest part of the day. During heatwaves or when fridges are opened frequently, consider an additional midday check.

Freezers: at least once daily. Freezers are more stable than fridges and lose temperature more slowly if they fail, so daily monitoring is usually sufficient. However, if you have a walk-in freezer that staff enter frequently, or a freezer that is known to be unreliable, increase to twice daily.

Hot holding: every 2 hours during service. The 2-hour rule is critical. If hot-held food drops below 63°C, it can be served within 2 hours. After 2 hours below 63°C, the food must be either reheated to 75°C (once only) or discarded. Your hot holding log must show the temperature at the start of service and then every 2 hours.

Cooking and reheating: every batch. Core temperature must be checked and recorded for every batch of high-risk food. This is not a random check — it applies to every joint of meat, every batch of soup, every tray of chicken. Use a calibrated probe thermometer and record the highest-risk item in each batch.

Delivery temperatures: every delivery. When chilled or frozen food arrives from a supplier, check the temperature before accepting it. Chilled food above 8°C or frozen food above -12°C should be rejected. Record the delivery temperature in your log — this is evidence of due diligence if a supply chain issue arises.

A temperature log that satisfies an EHO inspection needs more than just a number on a sheet. Every entry must tell a complete story. Here is what a proper temperature log needs:

Equipment identifier. Each fridge, freezer, and hot holding unit needs a unique name or number — "Fridge 1 - Meat Prep", "Freezer 3 - Bakery", "Hot Hold Left". The inspector needs to know exactly which equipment each reading relates to. A log that just says "fridge" is not specific enough.

Date and time. Every reading must be date and time stamped. Not just the date — the time as well. A reading of "4°C" tells the inspector nothing about when it was taken. Was it at 7am when the fridge hadn't been opened all night, or at 2pm in the middle of service? Time matters.

Actual temperature reading. The temperature, in degrees Celsius, to one decimal place (e.g., 4.2°C). "OK" or a tick is not a temperature reading and will be rejected by an EHO. The inspector wants to see actual numbers — they reveal trends, gradual drift, and equipment that is slowly failing.

Corrective action. This is the column that most paper logs miss, and it is the column that EHOs look for most carefully. When a reading is out of range — fridge at 9°C, hot holding at 58°C — what did you do about it? "Moved food to Fridge 2, called engineer, discarded X items" is a corrective action. Leaving the out-of-range reading with no follow-up is evidence that your system doesn't work.

Staff signature or identity. Who took the reading? A name or initials creates accountability. If every reading is taken by the same person, or if different handwriting appears on the same day, the inspector will notice. Digital systems automatically record staff identity with every entry.

EHO inspectors see the same temperature log mistakes week after week. These patterns immediately raise suspicion and trigger deeper investigation. Here are the most common ones and how to avoid them:

Gaps in the log. A fridge checked every day for three weeks, then nothing for four days. The inspector's question is simple: was the fridge not checked, or were the checks not recorded? Either answer is a problem. Gaps suggest the temperature monitoring system isn't reliable, and if the system isn't reliable, the inspector has no confidence in any of the readings.

Suspiciously perfect readings. A fridge that reads exactly 4.0°C every single day, twice a day, for three months. That is not a real fridge — real fridges fluctuate. Readings should vary slightly by time of day, by ambient temperature, by how often the door was opened. Perfect consistency is a tell-tale sign that someone is writing down what the temperature should be, not what it actually is.

Missing corrective actions. The log shows "9°C" at noon, but by 2pm it's back to "4°C" with no explanation. What happened? Did someone fix the fridge? Move the food? Call an engineer? Without corrective action recorded, the inspector assumes the worst: that food was at unsafe temperatures and nobody did anything about it.

Same handwriting for every entry. On a paper log, every reading across multiple staff members, across multiple shifts, written in the same pen with the same handwriting. This is a strong signal that one person sits down and fills in the entire log retrospectively. The inspector will discount the entire log and score management confidence accordingly.

Uncalibrated probes. You need to demonstrate that your probe thermometer is accurate. Probes should be calibrated regularly — at least every 6 months — and calibration records should be available. A common calibration check is to measure the temperature of ice water (should read 0°C) and boiling water (should read 100°C). If you can't show calibration records, the inspector cannot trust your temperature readings.

Wireless temperature monitoring systems use sensors placed inside fridges and freezers that transmit temperature data to a central hub or cloud platform. They offer continuous monitoring, 24/7, with alerts sent to your phone if a temperature drifts out of range — even at 3am when nobody is on site.

The advantages are clear: real-time alerts mean you know about a fridge failure before you arrive in the morning, potentially saving thousands of pounds worth of stock. No human error — sensors don't forget to take readings, don't write down the wrong number, and don't fill in logs retrospectively. And continuous data gives you a complete picture, not just two snapshots per day. You can see exactly when and why temperatures fluctuated.

The downsides: wireless systems require an upfront hardware investment, typically £30-£80 per sensor plus a hub or gateway. They need WiFi connectivity, which can be unreliable in some kitchen environments. And sensors need annual calibration, which adds an ongoing cost. For a single-site café with two fridges, manual checks with a probe thermometer may be perfectly adequate. For a multi-site operation or a business with high-value stock, wireless monitoring is a strong investment.

Regardless of whether you use wireless sensors or manual checks, the principle is the same: the data must be recorded, reviewed, and acted on. A wireless system that sends alerts to a phone that nobody checks is no better than a paper log that nobody fills in. Technology is an enabler, not a replacement for management oversight.

Digital temperature logging — whether through a dedicated app like Prevra or integrated with wireless sensors — solves the fundamental problems of paper logs. Every reading is automatically date and time stamped the moment it is entered, creating an audit trail that cannot be falsified. Staff identity is recorded with every entry. Corrective action fields are mandatory when a reading is out of range, so you can't accidentally skip them.

The Prevra app makes temperature logging simple: select the equipment from your pre-configured list, enter the reading (or scan it from a Bluetooth probe), and the app handles the rest. If a reading is outside your safe range, the app immediately prompts for corrective action. Managers get alerts for any out-of-range readings, missed checks, or equipment that is trending warmer over time. The 4-weekly review automatically pulls temperature data into the management report.