CoffeeNetwork (New York) - For much of 2026, coffee market attention has centered on Brazil's large harvest, expanding global supply forecasts and the possibility of the first meaningful surplus in several years. Recently, however, traders have begun focusing on a different question: what could the emerging El Niño event mean for the next crop cycle?
The shift in attention comes as meteorologists increasingly agree that El Niño conditions are developing in the Pacific Ocean and are likely to persist through late 2026 and into early 2027. While the current Brazilian harvest remains the dominant supply story, the timing of the weather event places Brazil's next arabica crop directly in the spotlight.
According to forecasts cited by NOAA's Climate Prediction Center and other climate monitoring agencies, El Niño conditions strengthened rapidly during the first half of 2026. Several forecasting models now indicate a high probability that El Niño will remain in place through the second half of the year and continue into early 2027, with some forecasts assigning a substantial probability to a particularly strong event.
For the coffee market, the significance lies not only in the existence of El Niño, but in its timing.
Brazil's coffee trees are expected to enter their critical flowering period during September and October, just as El Niño's influence is forecast to intensify. Flowering represents one of the most important stages in coffee development because it largely determines the number of cherries that will ultimately form and contribute to the following harvest.
Under normal conditions, flowering is triggered by the arrival of seasonal spring rains following the dry winter period. When those rains are delayed or unevenly distributed, flowering can become irregular. Trees may flower multiple times instead of uniformly, creating uneven cherry development and lowering productivity potential.
This concern has become increasingly relevant because many market participants believe the current Brazilian crop could be one of the largest on record. USDA forecasts place Brazil's 2026/27 production near 71.9 million bags, while some private analysts have projected even larger harvests. Yet despite these bullish supply forecasts, futures markets have remained sensitive to weather headlines because traders recognize that risks to the 2027 crop are beginning to emerge.
The market's concern is straightforward. A record crop this year does not guarantee another record crop next year if weather conditions become unfavorable during flowering and early cherry development.
Recent price action reflects a market that is increasingly balancing near-term abundance against longer-term uncertainty.
Brazil's harvest continues to advance, but weather disruptions have already slowed fieldwork in some regions this year. At the same time, certified arabica inventories remain historically tight by recent standards, limiting the buffer available if future supply concerns intensify. As a result, traders have become more willing to react to developing weather risks than they might during a period of plentiful inventories.
In practical terms, this means weather forecasts for September and October could become just as important as harvest reports over the next several months.
If spring rains arrive on schedule, concerns surrounding El Niño may fade quickly. If moisture deficits develop during flowering, however, the market could begin reassessing expectations for Brazil's 2027 production potential.
While Brazil currently commands most of the market's attention, Vietnam should not be overlooked. The world's largest robusta producer faces a different set of challenges from El Niño. In Vietnam, forecasters are increasingly concerned about drought conditions developing across the Central Highlands during the 2026-27 dry season. The region accounts for the overwhelming majority of the country's robusta production and is highly dependent on adequate water supplies for flowering, cherry development and bean filling.
Vietnamese weather officials have warned that reduced rainfall and elevated temperatures may persist through late 2026 and into early 2027. Water shortages during key development stages could reduce yields, lower bean size and create quality concerns, particularly if irrigation reservoirs come under pressure.
Unlike Brazil, where market attention is focused on a narrowly defined flowering window this autumn, Vietnam's risk is more prolonged. Any drought-related damage would likely emerge over several months as trees face cumulative moisture stress.
What NOAA's ENSO Outlook Means for Coffee
The latest ENSO outlooks suggest El Niño conditions are likely to persist through the remainder of 2026 and into the first quarter of 2027. Forecasts referenced by climate agencies indicate probabilities exceeding 90% for El Niño persistence through much of the period, with a meaningful chance that the event could reach strong intensity.
For coffee producers, the key issue is not whether El Niño develops, but how its regional weather impacts align with crop calendars.
In Brazil, the concern is delayed or insufficient rainfall during flowering in September and October. In Vietnam, the focus is on prolonged drought, irrigation stress and the potential impact on robusta development through the 2026-27 growing season.
The coffee market appears to be entering a transition period. Earlier this year, discussion centered almost entirely on record Brazilian production, improving global supply prospects and expanding export availability. Today, the conversation is gradually shifting toward weather risk and the outlook for the next crop cycle.
That does not mean El Niño has already damaged coffee production. Far from it. But markets rarely wait for losses to occur before pricing risk. Instead, they react when weather threats align with vulnerable stages of crop development.
At present, no coffee origin is more exposed to that timing risk than Brazil. With flowering season only weeks away and El Niño expected to strengthen during the same period, weather forecasts are likely to become an increasingly important driver of coffee market sentiment through the remainder of 2026.
Alexis Rubinstein
Sources: NOAA, USDA
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