How climate change is threatening the future of coffee

Coffee, one of the world’s most traded commodities and a daily ritual for billions, faces an existential threat from climate change. Rising temperatures, erratic rainfall, shifting pest patterns, and deforestation are upending the delicate environmental balance that coffee depends on, and the world’s coffee belt, stretching through Latin America, Africa, and Asia, is shrinking. This article unpacks how climate change is reshaping the coffee industry and some of the solutions being explored to secure the future of one of the planet’s most beloved beverages.

The global coffee industry

Coffee is a global economic and cultural pillar. Every day, the world consumes roughly 2.25 billion cups of coffee, with global exports worth around US$51 billion annually. The coffee sector supports over 125 million people globally, most of them in developing countries. Coffee is grown in over 70 countries along the so-called “Coffee Bean Belt”, the tropical latitudes between the Tropics of Cancer and Capricorn. The largest producers are Brazil, Vietnam, Colombia, Indonesia, and Ethiopia, but dozens of smaller economies, from Guatemala to Uganda to Papua New Guinea, rely heavily on coffee exports for foreign exchange. In some nations, coffee represents more than 20% of total export earnings; in Ethiopia, for example, coffee accounts for up to one-third of export revenues.

Two species of coffee dominate global production: Arabica (Coffea arabica), prized for its smooth flavour and grown mostly at higher altitudes in cooler climates; and Robusta (Coffea canephora), which has a stronger, more bitter taste and is typically cultivated at lower elevations and higher temperatures. Arabica accounts for around 60-70% of global production, while Robusta makes up the rest. The two species have distinct ecological requirements. Arabica thrives between 18-24°C, prefers mid-elevation mountains, partial shade, and consistent moisture, and is highly sensitive to temperature shifts and pests; Robusta prefers temperatures between 24-30°C, lower altitudes, and high humidity levels. Coffee plants depend on a balance of wet and dry seasons – too little rain and cherries (the fruit of a coffee plant) fail to develop; too much, and disease and fungal growth explode. The entire industry, therefore, rests on fragile ecological foundations which are shifting rapidly.

Effects of climate change on coffee

Coffee is exceptionally climate-sensitive. Even slight deviations in temperature, rainfall, or humidity can affect pest pressure, yield, and quality. Climate change has already begun to reshape coffee production patterns. According to the Intergovernmental Panel on Climate Change (IPCC), global average temperatures have risen by approximately 1.1°C since pre-industrial times, but in key coffee-growing regions, local increases are often higher. In Brazil, the world’s largest producer, a combination of heatwaves and drought in 2021 led to the worst harvest in decades, reducing output by over 20%. Meanwhile, erratic rainfall patterns have disrupted flowering cycles in Ethiopia. Studies project that by 2050, up to 50% of current coffee-growing areas could become climatically unsuitable for Arabica. Regions with long dry seasons, like Central America, Brazil, and India are expected to lose almost 80% of their coffee-growing areas by the mid-century.

In addition to altering temperature and rainfall, climate change is reshaping the entire ecosystems underpinning coffee cultivation. Warmer, wetter conditions in many regions are ideal for coffee leaf rust (Hemileia vastatrix), a fungal disease that devastated Central America between 2012 and 2014, destroying up to half of the region’s crop and causing an estimated US$3.2 billion in losses. Leaf rust thrives above 20°C, and as highland areas warm, the fungus has spread into zones once considered safe. Similarly, climate change is expanding the range in which the coffee berry borer (Hypothenemus hampei), a beetle that burrows into coffee cherries, can survive.

The socioeconomic implications of a coffee crisis are considerable. For countries across Central America, the coffee industry underpins rural employment. Climate-induced crop losses ripple through the entire value chain, reducing export income and farmer livelihoods. Smallholder farmers, who produce approximately 80% of the world’s coffee, are particularly vulnerable to these losses. Most smallholder farmers lack access to irrigation technologies, pest control, or crop insurance, and depend on stable yields for survival. Climate shocks can push families into poverty, dependence on aid, or migration. In Ethiopia, for example, coffee farmers have reported migrating to higher elevations or diversifying crops as lower-lying areas become unproductive. The global coffee market is also vulnerable to climate shocks. Reduced yields and quality lead to price volatility. The 2021 droughts in Brazil, for example, sent coffee prices to their highest levels in a decade. Some analysts warn of “climate inflation” in coffee, where extreme weather drives sustained price spikes.

As traditional coffee regions heat up, new areas of coffee growth are emerging. Research suggests that higher altitudes and more temperate latitudes could become suitable for coffee production by mid-century. Parts of southern Brazil, Argentina, China, and even parts of the United States (California, North Carolina, Hawaii) are experimenting with coffee cultivation. In Africa, Rwanda and Kenya are seeing coffee migrate to higher elevations, while in Asia, plantations are creeping into the highlands of Myanmar and Yunnan, China. Expansion into these new zones raises new environmental issues. Clearing forests to make way for high-altitude coffee can accelerate deforestation. In Ethiopia’s montane forests – the original home of Arabica – expansion has already reduced forest cover and endangered wild coffee species that hold valuable genetic traits for resilience.

Preparing the coffee industry for a warmer future

Several avenues are being explored to ensure the survival of coffee in a warming world. One of the most hopeful avenues lies in developing climate-resilient coffee varieties. Arabica, though delicate, has a rich genetic heritage. Wild populations of Arabica in Ethiopia and South Sudan contain genes that could confer resistance to heat, drought, or disease. However, The Royal Botanic Gardens, Kew, estimates that 60% of wild coffee species face extinction, and scientists are racing to identify and conserve these wild relatives before they vanish.

Hybridisation of coffee species is another solution researchers are exploring. Researchers have developed Arabica–Robusta (“Arabusta”) hybrids that combine flavour with robustness. One promising example, Starmaya, can be propagated from seed (unusual for Arabica) and shows tolerance to leaf rust, drought, and heat. Others, like the Centroamericano hybrid, deliver higher yields with lower environmental impact. Biotechnology is also emerging as a tool to develop more climate-resilient coffee species. For example, genetic mapping allows breeders to identify drought-resistance coffee genes.

Beyond new varieties, coffee farmers are also adapting their growing practices in response to changing climates. Agroforestry, the integration of shade trees with coffee plants, helps regulate microclimates and preserve soil moisture. Studies suggest shaded coffee can reduce leaf temperatures by 2-3°C, buffering against heat stress and boosting pollination. In Latin America, shade-grown coffee systems are being revived as both a resilience and biodiversity strategy. Farmers are also adapting their water management through simple interventions such as rainwater harvesting, mulching, or drip irrigation. Meanwhile, some cooperatives are investing in early-warning systems for drought or pest outbreaks. In Kenya and Colombia, for example, mobile weather services now deliver localised forecasts to coffee farmers, helping them plan planting and harvesting.

At the policy level, adapting the coffee industry requires integrating climate risk into agricultural planning and trade. Programmes like the Global Coffee Platform and World Coffee Research promote sustainable farming practices, while initiatives such as Coffee & Climate, backed by major industry players, provide training and finance to smallholders to build climate resilience. However, coverage of these initiatives remains patchy, and funding insufficient relative to the scale of the challenge, risking widening existing inequalities between large commercial coffee growers and smallholders.

The future of coffee?

Coffee has long been a symbol of connection, linking people globally through shared rituals of focus, comfort, and social interactions. However, rising temperatures, volatile weather, and spreading pests are rendering coffee’s future uncertain. If global temperatures rise by 2°C, the planet’s coffee map will look very different. Arabica may retreat to higher, cooler zones, while Robusta and new hybrids take over much of the lowland production. The flavour profiles that define beloved regional coffees, such as Ethiopian Yirgacheffe, Colombian Supremo, or Guatemalan Antigua, may shift or vanish entirely. As researchers warn, “the taste of climate change may be bitter”. But a crisis can also drive innovation: conserving wild coffee diversity, investing in climate-resilient varieties, advancing breeding, engaging in agroforestry, and reforming trade and finance to support smallholders could make coffee production more resilient and more equitable. The fate of coffee illustrates how climate change threatens not only our ecosystems, but also the cultural and economic systems woven into daily life. The next time we raise a cup, we might reflect on the fragility of coffees’ future and the urgent need to ensure that this simple daily pleasure remains possible for generations to come.