The Temperature Tightening
Climate change is making coffee production more challenging and less reliable through rising temperatures, unpredictable rainfall, and increased pests and diseases . The two dominant coffee species—Arabica and Robusta—face distinct vulnerabilities that are reshaping global production. Arabica grows optimally between 18-22°C, while Robusta tolerates higher temperatures up to 30°C with best production at 22-28°C . However, recent research reveals these tolerance ranges may be narrower than previously understood.
New studies using farm-yield data from 798 farms across Southeast Asia found robusta has an optimal temperature below 20.5°C—markedly lower by 1.5-1.9°C than current estimates of 22-30°C . This finding challenges assumptions about robusta’s heat tolerance and suggests both species are more vulnerable to warming than expected. Using Vapour Pressure Deficit measurements—which indicate how much water gets sucked out of plants—research shows Arabica yields fall sharply once this critical threshold is reached .
Global projections indicate climate change will reduce the area suitable for coffee by about 50% across emission scenarios by 2050 . The impacts vary by region, with the highest impacts at low latitudes and low altitudes, though impacts at higher altitudes and latitudes are still negative but less pronounced .
The Great Migration Upward
As temperatures rise, coffee cultivation is being forced to migrate upward to cooler elevations. Higher temperatures would move climates suitable for Arabica coffee from the current 400-2000 meters above sea level to 800-2500 meters above sea level . This shift is already visible across major growing regions.
In Central America, Nicaragua and El Salvador, which lack high mountains, would be most affected, while Guatemala, Mexico, Honduras, and Costa Rica could gain suitability at elevations 1500-2500 meters, partially compensating for losses at lower altitudes . In East Africa, suitable climates are predicted to shift from 400-2000 meters to 800-2500 meters, with potential gains at higher elevations of 1500-2400 meters .
However, this upward migration faces severe constraints. Higher elevations often come with steeper terrain, higher labor costs, and greater logistical challenges, while this upward migration has clear limits as mountain landscapes are finite and suitable high-altitude land is often already occupied or protected . Land at higher altitudes is often forested, creating increased land-use pressure on high-altitude forests .
The relationship between elevation and temperature is crucial: coffee grown closer to the equator requires higher altitudes to reach optimal temperatures, while coffee grown further from the equator can achieve optimal temperatures at dramatically lower altitudes—explaining why Hawaiian Kona at just 183-610 meters commands premium prices alongside Ethiopian beans at 2,130 meters .
Regional Winners and Losers
Climate change is creating a new geographic hierarchy of coffee production. The world’s dominant production regions in Brazil and Vietnam may experience substantial reductions in area available for coffee . Key factors behind recent price increases include limited export quantities from Vietnam, reduced output in Indonesia, and adverse weather in Brazil, with Vietnam experiencing a 20% drop in coffee production in 2023/24 .
Brazil, the world’s largest producer, is forecasting a 4.4% drop in production in 2025 with Arabica production expected to decline by 12% . Climate models indicate that 35% to 75% of Brazil’s Arabica coffee plantation areas will become economically unfeasible throughout the 21st century due to increased heat stress .
Meanwhile, some regions may benefit. Some regions in East Africa and Asia may become more suitable, but these are partially in forested areas, which could pose a challenge to mitigation efforts . Ethiopia, Kenya, Rwanda, and Burundi’s current growing areas would see little change in suitability, with potential gains as areas at higher elevations become more suitable .
New coffee-growing regions are emerging in areas like China, Nepal, and even parts of the United States, while traditional powerhouses like Ethiopia and Colombia struggle to maintain production .
Market Disruption and Price Volatility
The climate crisis is driving unprecedented volatility in coffee markets. Arabica prices rose by 13% in December 2024, exceeding a 60% year-on-year increase, while robusta prices doubled compared to 2023 levels . In 2024, coffee prices soared to the highest in 50 years at over $3.36 per pound, with predictions of $12 lattes as supply struggles to keep up with demand .
Early data indicates consumers paid 6.6% more for coffee in the United States and 3.75% more in the European Union in December 2024 compared to 2023 . The Global Coffee Market Compound Annual Growth Rate for 2024-32 is projected at 5.4%, but as coffee yields decline, prices will rise, impacting the entire market .
Some experts warn that coffee prices could double in the coming years , driven by the intersection of declining production capacity and growing global demand. Approximately 60% of world coffee comes from smallholder farmers, with 44% living below the poverty line and 22% in extreme poverty , making them particularly vulnerable to climate-induced volatility.
Adaptation Strategies and Agroforestry Solutions
Coffee farmers are implementing various adaptation strategies, with agroforestry emerging as a leading approach. Agroforestry systems contribute to farm resilience by diversifying income sources, improving microclimate regulation, and enhancing soil health, while providing shade, root diversity, and nutrient cycling that buffer coffee plants against climate variability, pest pressures, and yield fluctuations .
Research shows that while coffee yields will decline in both shade and monoculture systems, the overall vulnerability to climate change under agroforestry is reduced, and typical biennial yield fluctuations in unshaded systems can be replaced with more consistent annual yields under shade . High productivity is achievable with moderate shade up to about 60% cover, which permits moderate tree species diversity and generates other products while providing broader ecosystem services .
Agroforestry increases farmers’ resilience to shocks through healthy soils that enable coffee plants to withstand extreme weather events like droughts and heavy rains, with improved soil quality and favorable microclimate increasing both yield and quality over time . Climate-resilient varieties like the Marsellesa, developed to withstand warming climates, are being distributed to farmers, though few crops are as vulnerable to climate change as coffee .
Beyond agroforestry, farmers are adopting complementary strategies. At finer spatial scales, adaptation strategies focus on helping farmers improve shade management, adopt water and nutrient-efficient practices, and use drought and heat-stress adapted varieties . Complementary measures such as drought-tolerant cultivars, soil conservation practices, and efficient irrigation are essential for building resilient coffee systems .
The future of coffee depends on coordinated global action. The high prices should provide incentives to invest more in technology and research and development in the coffee sector to increase climate resilience , while limiting global warming in accordance with the Paris Agreement remains the best option to ensure sustainable coffee production and protect the millions of vulnerable farmers who depend on coffee for their livelihoods .