Global climate models, including those from the US Climate Prediction Center (CPC/NCEP/NWS) and the World Meteorological Organization (WMO), confirm the development of La Niña conditions in September 2025, with a high probability (around 70-71%) of persistence through the first half of South Africa's summer (October 2025–February 2026).
This aligns with your description of La Niña dominating the initial phase. However, forecasts indicate a 55% chance of transition to neutral ENSO conditions (neither La Niña nor El Niño) in the second half (January–March 2026), rather than a shift to La Niña again—potentially moderating rainfall later in the season. Overall, this points to a wetter-than-average summer, especially in the northeastern and central summer rainfall regions (e.g., Mpumalanga, Gauteng, Free State, and North West), which encompass most of the grain belt.
South Africa's summer grains (primarily maize, sorghum, and sunflowers) are predominantly rainfed (about 90% of production), making them highly sensitive to rainfall patterns. The 2025/2026 season outlook is cautiously optimistic for grain farmers, building on the recovery from the 2023/2024 El Niño drought that slashed white maize output by 25%. Here's a breakdown of key predictions:
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- Above-Normal Precipitation: Expect average to above-average rainfall from December 2025 to March 2026 across the summer grain belt, with early-season boosts (October–November) in eastern areas like Mpumalanga and KwaZulu-Natal. This should improve soil moisture for planting, support crop establishment, and boost yields—potentially leading to a harvest similar to or exceeding the 2024/2025 bumper crop of 19.55 million tonnes (up 26% year-on-year).
- Regional Benefits: Northeastern and central grain areas (e.g., eastern Free State) are forecast for the highest rainfall probabilities, aiding 90% rainfed maize production. Agbiz chief economist Wandile Sihlobo notes general farmer optimism, with early rains already enhancing soil conditions for the 2025/2026 planting (starting soon).
- Economic Upside: Favorable conditions could stabilize food prices, enhance food security, and support exports. Last season's La Niña rains lifted maize output to 15.8 million tonnes (23% increase), demonstrating the pattern's potential.

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