Rain Forecasts in Brazil Transform the Coffee Market Landscape

Weather forecasts predicting rain in Brazil’s main coffee-producing regions have triggered an immediate reaction in the futures markets. Recently, Arabica and Robusta contracts experienced significant corrections, reflecting how expected changes in weather conditions are reshaping global supply and demand dynamics. This shift in climate expectations has eased the previous tensions that had driven prices higher just days ago.

The strength of the U.S. dollar has acted as an amplifying factor for these corrections. With the dollar reaching four-week highs, commodities priced in dollars face additional structural pressure, regardless of specific coffee factors. This convergence of favorable weather forecasts and a strong currency has created a sharply weak scenario for both coffee varieties.

How Weather Forecasts Redistribute Market Pressures

The extreme volatility in Arabica prices is better understood when analyzing recent months’ weather forecasts. Just days ago, KCH26 (Arabica futures for March) traded at four-week highs, driven by below-normal rainfall data in Minas Gerais, the most critical region for Brazilian production. Data from Somar Meteorologia indicated that this area had only received 47.9 mm of rain in the week ending January 2, just 67% of the expected historical average.

However, new forecasts predicting generous rain for the following week completely changed this scenario. The KCH26 contract fell 3.41% today, while its Robusta counterpart (RMH26) declined 1.02%. These movements reflect how markets quickly price in changes in weather forecasts, adjusting agricultural performance expectations almost instantly.

Meanwhile, inventories monitored by ICE provide a buffer against volatility but are insufficient to sustain high prices amid forecasts of normalizing weather conditions. Arabica stocks fell to a 1.75-year low with 398,645 bags on November 20, before recovering to 461,829 bags last Wednesday. For Robusta, inventories also hit annual lows in December but have since stabilized at levels corresponding to five-week highs.

Global Supply Dynamics Under New Production Forecasts

Crop forecasts for the upcoming season indicate significant changes in the global supply structure. Brazilian agency Conab, in its December 4 revision, increased its estimate for Brazil’s coffee production in 2025 by 2.4%, projecting 56.54 million bags compared to the previous September estimate of 55.20 million bags. Although positive, this contrasts with more pessimistic forecasts from USDA’s Foreign Agricultural Service (FAS), which estimates a 3.1% decline in Brazilian production for 2025/26 to 63 million bags.

Vietnam emerges as the critical variable complementing these forecasts. The country solidified its position as the leading Robusta producer with exports of 1.58 million metric tons in 2025, a 17.5% year-over-year increase. Forecasts for the 2025/26 season suggest a production of 1.76 million metric tons (29.4 million bags), marking four-year highs. The Vietnam Coffee and Cacao Association (Vicofa) anticipates that favorable weather conditions could boost the harvest by an additional 10%.

This dynamism in Vietnam contrasts with the expected weakness in Brazil, reshaping global supply and demand balance forecasts. U.S. imports of Brazilian coffee fell significantly during the high-tariff period, totaling 983,970 bags between August and October—a 52% drop compared to the previous year. Although tariffs have been reduced, U.S. inventories remain limited, suggesting that import recovery will be gradual.

Inventory Outlook: What Forecasts Reveal

Global inventory outlooks provide important signals about future price trajectories. According to the International Coffee Organization (ICO), global coffee exports for the current coffee year (October to September) decreased by 0.03% year-over-year to 138.658 million bags, indicating some tightening in global supply despite higher production forecasts.

However, USDA/FAS forecasts published on December 18 project that global coffee production will reach a record high of 178.848 million bags in 2025/26, a 2% increase from the previous period. This growth is unevenly distributed: Arabica production will fall 4.7% to 95.515 million bags, while Robusta will increase 10.9% to 83.333 million bags. End stocks for 2025/26 are projected to fall 5.4% to 20.148 million bags, below the 21.307 million bags in 2024/25, indicating that production growth will barely meet demand.

These balanced forecasts, where supply grows modestly to just satisfy demand, set a framework within which tactical reactions to climate changes and currency movements become more significant. Traders, aware that long-term forecasts suggest a relatively tight market, respond with extreme volatility to any short-term climate outlook changes. In this context, recent rain forecasts in Brazil that eased tensions are not just technical shifts but a fundamental recalibration of expectations about how global supply will evolve in the coming months.