El Niño Threatens West African Food Security and Monetary Policy Space in 2027
The confirmed return of El Niño conditions is forcing central banks across sub-Saharan Africa to revise inflation forecasts upward and recalibrate rate-cutting cycles, with consequences that extend well beyond South Africa’s maize belt into West African grain markets, food import costs, and the monetary policy frameworks of ECOWAS member states.
A Climate Shock With Continental Monetary Consequences
Leading international climate agencies have confirmed the development of El Niño conditions, triggering an immediate reassessment of inflation trajectories across African economies. Investec, one of South Africa’s largest financial institutions, has raised its 2027 consumer price index (CPI) inflation forecast to 3.7% year-on-year, up from a prior estimate of 3.3%, citing food prices as “the largest single contributor to inflation.”
Investec chief economist Annabel Bishop warned that agrichemical price pressures would compound the upward revision, narrowing the window for monetary easing. The bank now anticipates the South African Reserve Bank (SARB) will cut rates only once or twice in 2027, depending on the severity and duration of the El Niño event, a significant retreat from earlier expectations of a more accommodative cycle.
For West African economies, where food expenditure typically accounts for 40% to 60% of household budgets, the implications of a prolonged Southern African drought ripple through import prices, regional grain markets, and the inflation mandates of central banks already navigating fragile post-pandemic recoveries.
SARB Modelling Signals Higher-for-Longer Rate Environment
South African Reserve Bank Governor Lesetja Kganyago confirmed at the most recent Monetary Policy Committee (MPC) meeting that policymakers had already incorporated El Niño scenarios into their modelling frameworks, alongside escalating geopolitical tensions in the Middle East.
“The second included El Niño, a weather pattern that seems to be forming currently, and which typically brings drought to parts of South Africa,” Kganyago said, adding that all of the SARB’s risk scenarios pointed to higher inflation and weaker economic growth simultaneously.
The SARB’s most severe scenario projects inflation rising above 6%, requiring three additional interest rate increases. A prolonged Middle East conflict alone could necessitate two additional hikes; layering El Niño onto that scenario would sustain elevated rates for an extended period. That modelling discipline, while appropriate for an inflation-targeting central bank, illustrates the compounding nature of external shocks on African monetary frameworks.
The Bank of Ghana, the Central Bank of Nigeria, and the Banque Centrale des États de l’Afrique de l’Ouest (BCEAO), which governs monetary policy for the eight WAEMU member states, face analogous pressures. Each institution has been managing elevated food inflation driven by currency depreciation, fuel subsidy reforms, and post-pandemic supply chain disruptions. An El Niño-driven spike in regional grain prices would test the credibility of inflation targets across the board.
Maize Markets and the West African Food Import Exposure
South Africa is a critical maize exporter to sub-Saharan Africa. Any El Niño-induced contraction in its summer grain crop would reduce regional supply precisely when global corn prices are also expected to rise, creating a dual price shock for net food-importing economies.
Bishop noted that South Africa’s maize crop, a staple food, could shift from being “a source of food price deflation to becoming an inflation driver” if drought conditions reduce domestic production while international corn markets tighten simultaneously. Ghana, Senegal, and Côte d’Ivoire, which rely on regional and global grain markets to supplement domestic production, are directly exposed to this dynamic.
Ghana’s food inflation reached 23.6% in mid-2023 before moderating under IMF-supported fiscal consolidation and a strengthening cedi. A renewed food price shock in 2027 would stress that consolidation, potentially widening the fiscal deficit through higher import bills and social protection expenditures. Senegal, preparing to leverage new oil and gas revenues through its PETROSEN framework, could find inflationary pressures complicating the monetary neutrality it needs to sustain WAEMU membership criteria.
Nigeria’s structural dependence on food imports, exacerbated by the naira’s depreciation following subsidy removal in 2023, leaves it particularly vulnerable. Food inflation in Nigeria exceeded 35% in early 2024; an El Niño shock arriving before domestic agricultural productivity reforms take hold could reverse hard-won disinflation gains.
Institutional Preparedness: ECOWAS, AfCFTA, and Regional Food Reserves
The El Niño confirmation exposes a structural gap in West Africa’s regional governance architecture: the absence of a functional, adequately capitalised regional food reserve mechanism. ECOWAS established the Regional Food Security Reserve (RFSR) framework, but its operational capacity remains limited relative to the scale of potential demand shocks.
The African Continental Free Trade Area (AfCFTA) offers a longer-term institutional pathway. By reducing tariff barriers on intra-African agricultural trade, AfCFTA could theoretically allow surplus-producing countries to supply deficit markets more efficiently during climate shocks. However, non-tariff barriers, inadequate cross-border infrastructure, and weak sanitary and phytosanitary harmonisation continue to constrain intra-African food trade, which accounts for only 17% of total African agricultural exports, compared to over 60% for intra-European trade.
The AU’s Comprehensive Africa Agriculture Development Programme (CAADP) framework, under which member states committed to allocating 10% of national budgets to agriculture, remains chronically underfunded across ECOWAS members. Ghana allocates approximately 4% of its budget to agriculture; Nigeria’s allocation is similarly below the Maputo commitment threshold. Without sustained public investment in irrigation, drought-resistant seed varieties, and agricultural logistics, climate shocks will continue to translate directly into food price volatility rather than being absorbed by productive capacity.
Policy Pathways for Central Banks and Finance Ministries
Bishop cautioned that forecasts carry significant uncertainty because the duration and intensity of El Niño can still change materially. That uncertainty itself is a governance challenge: central banks cannot wait for complete information before adjusting communication and forward guidance frameworks.
For the Bank of Ghana, which has been rebuilding credibility following the 2022 sovereign debt crisis and domestic debt restructuring, the priority is maintaining the disinflation trajectory achieved under its IMF-supported programme. Governor Ernest Addison’s institution should use the El Niño confirmation as a trigger to publish scenario-based inflation projections that explicitly model drought-driven food price paths, improving transparency and anchoring market expectations.
For ECOWAS finance ministers, the immediate institutional response should be to activate the RFSR’s early-warning protocols, coordinate with the Food and Agriculture Organisation (FAO) on regional crop monitoring, and accelerate negotiations on intra-regional grain trade facilitation under AfCFTA’s agricultural annex.
Investec’s revised forecast of 3.7% CPI inflation for South Africa in 2027 may appear modest by West African standards, but the transmission mechanism it identifies, food prices amplified by climate shocks and global commodity markets, is identical across the region. The difference lies in institutional buffers: exchange rate flexibility, fiscal space, central bank credibility, and regional coordination capacity.
West African institutions that treat the El Niño confirmation as a planning trigger rather than a future contingency will be better positioned to defend monetary stability, protect household purchasing power, and maintain the investor confidence that regional integration frameworks depend upon to function.
