When weather becomes part of the food supply chain

The weather is a staple of British conversation. Too hot, too cold, too windy, too wet. You know the drill.

But for those of us working in the fresh produce industry, the weather isn’t simply small talk. It is one of the biggest forces shaping what arrives in our fields, our packhouses, our warehouses, our depots and ultimately on supermarket shelves.

This summer’s extreme weather across the UK has brought that reality into sharp focus. High temperatures, dry soils, heavy irrigation demand and pressure on crops are no longer distant warnings. Changes to the climate are happening now, and they matter to everyone involved in feeding the nation.

This is why we take weather volatility seriously. It is not just a farming issue. It affects availability, quality, shelf life, transport planning, customer confidence and food security. Our role is to understand those pressures early, work closely with growers and customers, and help keep the supply chain moving even when conditions become more difficult.

Crops do not grow to a spreadsheet

Fresh produce is a living supply chain. It starts in the soil, not in a factory. A crop does not follow a production schedule simply because the market needs it to. It responds to sunlight, water, temperature, soil condition, pests, disease pressure and the timing of the season.

When the weather is kind, growers can plan with confidence. Planting, irrigation, harvesting, transport and packing all move in rhythm. When the weather becomes extreme, that rhythm changes.

Heat can speed up crop development, meaning produce matures faster than expected and must be harvested quickly. Dry conditions can reduce size, yield and quality. Too much rain at the wrong time can prevent machinery getting onto fields, increase disease pressure or damage delicate crops. A cold spring can delay growth. A hot summer can compress the harvest window and even stall growth. A storm can undo months of hard work in just a single afternoon.

For shoppers, the result may appear as a slightly shorter shelf life, a smaller size profile, a change in price, a gap on the shelf or a change in country of origin. For growers and suppliers, it means rapid decision-making, constant communication and a supply chain that has to adapt in real time.

The UK picture: heat, water and harvest pressure

The recent extreme weather has been particularly challenging because it follows dry spring conditions in parts of the country. For many crops, water availability is now a central concern.

Irrigation can help protect crops, but irrigation depends on reservoirs, abstraction licences, water availability and the ability to apply water at the right time. When temperatures rise sharply, crops need more water, livestock need more water, people use more water, and the whole system comes under pressure all at once.

This is especially important for field vegetables, salad crops, soft fruit and other crops where quality and timing are critical. A few days of extreme weather can change the commercial outcome of a crop. It can affect yield, size, eating quality, harvest labour, transport planning and packhouse efficiency.

It is also worth remembering that British growers are already operating in a demanding environment. Costs are rising, labour availability remains a challenge, and weather volatility adds another layer of risk. Farming has always required resilience, but the level of uncertainty is increasing.

El Niño: just one piece of the puzzle

It is also important to place this year’s weather in a wider global context. We’re currently in the grip of El Niño, which is forecast to continue until the end of 2026.

El Niño is part of a natural climate pattern known as the El Niño–Southern Oscillation, or ENSO. It is linked to warmer-than-usual sea surface temperatures in the central and eastern tropical Pacific Ocean, and many believe it could be one of the strongest ever recorded.

While El Niño can influence global weather patterns and can increase the likelihood of unusual rainfall, drought, heat or flooding in different parts of the world, its effects vary by region and season, and they interact with local conditions.

El Niño is not the only cause of hot weather or difficult harvests in the UK. Weather is shaped by many factors, including local pressure systems, jet stream patterns, sea temperatures, soil moisture, seasonal variation and the wider warming climate. We do need to accept that El Niño is another significant climate signal in a world where food supply chains are already becoming more exposed to weather volatility.

Why El Niño matters to a UK food business

The UK does not feed itself from UK farmers alone. Our food system is connected to growing regions across Europe, Africa, South America, Asia and beyond. That means weather events thousands of miles away can affect availability, cost and quality here at home. It’s the fresh produce version of the butterfly effect.

El Niño can matter because it can shift rainfall and temperature patterns across key agricultural regions. In some areas, it may be associated with drought and water stress. In others, it may bring heavier rainfall, flooding or increased disease pressure. It can influence the timing of planting, harvesting, irrigation demand and transport.

That can affect crops such as bananas, grapes, citrus, avocados, salad crops, rice, sugar, coffee, cocoa and many others. It can also affect ports, shipping routes, energy demand, cold chain reliability and the cost of moving goods.

For a business like MWW, this means we must look beyond the weather outside our own window. We need to understand what is happening in across the world. A difficult season in one country can quickly become a procurement, quality or availability issue in another.

The global produce chain is becoming more connected – and more exposed

Fresh produce has always depended on international relationships. The UK consumer has become used to year-round availability, wide choice and consistent quality. That is only possible because of a sophisticated global supply chain. But the same global network that gives us choice also exposes us to global risk.

The challenge is not simply that the weather is changing. It is that weather events are becoming more frequent, more intense and more likely to overlap. One region may normally cover for another. But when several growing regions are under pressure at the same time, the supply chain has less room to manoeuvre.

What this means for growers, suppliers and customers

While it’s tempting to panic, the answer to these issues is preparation.

A resilient produce business needs good data, strong grower relationships, flexible sourcing, honest communication and a deep understanding of crop cycles. It also needs the ability to move quickly when conditions change.

That means asking practical questions earlier:

• Are crops developing ahead of schedule?

• Are irrigation reserves sufficient?

• Are harvest windows likely to shorten?

• Is quality likely to be affected by heat, rain or disease pressure?

• Do we have alternative sources if one region comes under pressure?

• Can our transport and cold chain protect product quality during extreme temperatures?

• Are customers being kept informed early enough?

The best supply chains are not the ones that never face disruption. They are the ones that see it early, communicate clearly and respond intelligently.

The future: adaptation, not assumption

We cannot assume that tomorrow’s growing seasons will behave like yesterday’s. That does not mean British agriculture or global fresh produce is doomed. Far from it. Growers are some of the most adaptable and practical people in business.

But adaptation will be essential. That may include investment in water storage, better irrigation, soil health, protected cropping, varietal development, improved forecasting, stronger cold chains and more flexible sourcing models. It will also require greater understanding from the whole supply chain, including retailers and consumers, that food is seasonal, weather-sensitive and increasingly exposed to climate volatility.

For businesses like MWW, adaptation also means continuing to invest in people, systems, technical standards, customer communication and operational resilience. The weather may be unpredictable, but our response cannot be.

Our role in a changing food system

At MWW, we understand that fresh produce is not simply bought and sold. It is grown, harvested, handled, packed, transported and delivered through a chain of people, places and decisions.

That chain is becoming more exposed to weather volatility; no business can control the weather, but we can prepare, communicate and respond.

Which is why at MWW we’re staying close to growers and customers. We do this through strong relationships, experienced teams, careful quality management, flexible sourcing, disciplined logistics and a deep respect for the complexity of fresh food production.

Extreme weather is becoming a food supply and food security story.

For MWW, it is a reminder of the responsibility we carry every day: helping to bring fresh produce from growers to customers safely, reliably and with care.