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What are temperature excursions?

Pharmaceutical vial on its side surrounded by melting ice crystals and water droplets on a white surface, minimalist flat lay.

Published by Tapp

Last updated at 31 December 2025

Reading time 4 minutes

Temperature excursions can destroy entire shipments in hours. They turn profitable deliveries into costly waste. Whether you’re shipping fresh produce, pharmaceuticals, or frozen goods, understanding these temperature problems helps protect your products and money.

This guide explains what temperature excursions are. It shows why they happen and their business impact. You’ll learn practical ways to prevent them.

What exactly are temperature excursions?

A temperature excursion happens when products get too hot or too cold. This occurs during storage or transport. Normal small changes in temperature are okay. But excursions go beyond safe limits.

Different products need different temperatures:

  • Fresh produce – needs 2°C to 8°C to stay fresh
  • Frozen foods – must stay below -18°C to prevent thawing
  • Medicines – often need 2°C to 8°C with very little change allowed
  • Flowers – usually need 1°C to 4°C depending on the type

These temperature ranges protect different products in specific ways. Fresh produce stays crisp and safe to eat. Frozen foods keep their quality and don’t spoil. Medicines remain effective and safe to use. Flowers stay beautiful and last longer.

How bad an excursion is depends on two things. First is how far the temperature goes outside the safe range. Second is how long it stays there. A small spike for a few minutes might not hurt much. But big temperature changes or long excursions can ruin products in hours.

Why temperature excursions happen during shipping

Several things can cause temperature problems during shipping:

  • Equipment breaks down – refrigeration units stop working or lose power
  • Human mistakes – workers leave doors open too long or load products wrong
  • Weather problems – extreme heat or cold strains cooling systems
  • Transport delays – traffic jams or route changes make trips longer than planned
  • Handover issues – products get exposed when moving between trucks and warehouses

These problems often happen together, making excursions more likely. For example, a truck breakdown during hot weather creates double trouble. The cooling stops working just when outside temperatures are highest. Understanding these risk factors helps you prepare better protection for your shipments.

The real cost of temperature excursions to your business

Temperature excursions hurt your business in many ways:

  • Product loss – spoiled goods can’t be sold and must be thrown away
  • Insurance problems – claims might be rejected if temperature records show excursions
  • Angry customers – restaurants, pharmacies, and shops complain about bad products
  • Extra costs – investigation time, replacement shipping, and stronger monitoring
  • Reputation damage – customers lose trust when they receive poor quality products

These costs add up quickly and can seriously damage your business. A single large excursion might cost thousands of pounds in lost products. The hidden costs of customer complaints and reputation damage can be even worse. Smart businesses invest in prevention because it costs much less than dealing with excursions after they happen.

How to prevent and respond to temperature excursions

You can prevent most excursions with good planning:

  • Use proper packaging – good insulation and right-sized containers for trip length
  • Maintain equipment – regular checks of refrigeration systems and backup power
  • Train your team – teach staff correct loading and emergency procedures
  • Monitor temperatures – use data loggers to track conditions throughout shipping
  • Plan for problems – have backup plans for delays and equipment failures

When excursions happen, act fast. Write down all the details right away. Record temperatures, timing, and what caused the problem. Check if products are still safe using your industry guidelines. Some products can handle small, short excursions. Others must be thrown away after any temperature problem.

Good monitoring helps catch problems early. Tapp’s paper-based data loggers track temperature continuously. They store over 8,000 data points with batteries lasting up to 180 days. You can read them instantly with any smartphone. No apps needed.

Temperature excursions are a serious threat to cold chain businesses. But they can be prevented and managed well. Understanding the causes and costs helps you protect your products. Good monitoring, maintenance, and response plans keep your customers happy and your business profitable.

If you’re interested in learning more, contact our team of experts today.