THE NEWS

According to Petronotícias, Brazil's Empresa de Pesquisa Energética (EPE) has published a technical note identifying three priority areas — in the Northeast, in Rio de Janeiro, and in the South — as the most favorable zones for offshore wind development along the Brazilian coast. The study drew on publicly available databases and mapped 20 wind clusters along the coastline, with mean wind speeds ranging between 7 m/s and 10 m/s across the highlighted regions.

Beyond identifying high-wind areas, the EPE analysis characterizes each region's wind behavior in terms of seasonality, intra-day variation, predominant direction, and speed dispersion. The study was coordinated by Reinaldo da Cruz Garcia, the EPE's director of Electric Energy Studies. The agency notes that winds along most of the Brazilian coast tend to follow the coastal line, with the Northeast standing out for the particularly steady influence of trade winds.

A general pattern observed across all clusters is that stronger winds tend to occur in the second half of the year, while the lowest speeds are typically recorded during daytime hours, particularly in the early afternoon. The EPE notes that "the analysis aimed to consolidate available information and begin filling knowledge gaps on offshore wind resources in Brazil."

WHY IT MATTERS

This study is not a licensing framework or a regulatory instrument — it is a resource characterization exercise. But for an industry that has been waiting for regulatory clarity on offshore wind in Brazil, a rigorous public dataset of this kind carries weight beyond its immediate scope. It provides a common technical reference that developers, regulators, grid operators, and financiers can use when evaluating project viability, and it signals that the EPE is actively building the analytical foundation for a future licensing regime.

The three hotspots identified carry meaningfully different risk profiles for project developers. The Northeast cluster — spanning Clusters 4 through 8, between Piauí and Rio Grande do Norte — offers the highest mean wind speeds in the study, with strong directional consistency attributable to trade wind influence. Seasonal amplitude is pronounced: the EPE reports mean speeds reaching approximately 11 m/s between August and October, dropping to around 6 m/s between March and May. That variability is a planning variable that developers and grid operators will need to account for in capacity factor projections and dispatch modeling.

The Rio de Janeiro hotspot, corresponding to Cluster 15 on the state's northeastern coast, presents a different profile. Wind speeds are strong and directionally consistent, but speed distribution is more dispersed across frequency bands. The offsetting advantage is low intra-day variability — a characteristic that reduces short-term forecasting uncertainty and could make this cluster more compatible with grid balancing requirements. Monthly mean speeds range from approximately 7 m/s in the March–June window to around 10 m/s between July and February, a narrower seasonal swing than the Northeast.

The Southern hotspot — Cluster 20, extending from southern Santa Catarina through Rio Grande do Sul — operates with the weakest seasonality of the three, with a year-round speed variation of approximately 2 m/s. Its intra-day profile is among the most stable of all 20 clusters analyzed. The trade-off is greater dispersion in both speed and direction, which the EPE identifies as a factor that could make the resource harder to predict. For the offshore supply chain, this region also raises questions about water depth and metocean conditions that the current study, focused on wind resource characterization, does not address.

For Brazilian offshore operators and service companies, the relevance of this study extends beyond the energy transition narrative. Offshore wind development — particularly floating offshore wind, which would be required in deeper waters — draws on many of the same competencies and supply chains as oil and gas: subsea engineering, marine logistics, heavy-lift vessels, mooring systems, and dynamic cable installation. Companies already active in Brazilian offshore O&G are positioned to evaluate where their capabilities intersect with emerging offshore wind demand, particularly if the regulatory framework advances toward licensing.

From a grid integration perspective, the EPE's observation that the three hotspots carry distinct seasonal and diurnal profiles is analytically significant. The Brazilian National Interconnected System (SIN) already manages significant intermittency from onshore wind, concentrated in the Northeast. Offshore wind from multiple coastal zones with different generation profiles could, in principle, provide complementarity — though the degree to which that potential is realized depends on transmission infrastructure, which the current study does not evaluate.

The study's explicit acknowledgment that it is filling knowledge gaps and calling for further research also signals where the analytical agenda is heading. Resource characterization is the first step; what follows typically includes technical-economic feasibility studies, environmental baseline assessments, and grid connection studies. The pace at which those subsequent steps are taken will determine whether the clusters identified here translate into bankable projects within a relevant timeframe.

CONTEXT

Brazil has been developing its regulatory framework for offshore wind more gradually than some comparable markets. The EPE's cluster mapping exercise is consistent with the preparatory analytical work that has preceded offshore wind licensing in other jurisdictions, where resource atlases and technical notes of this kind have informed both regulatory design and early project siting decisions.

The study's focus on publicly available data and its publication as an open technical note reflect the EPE's role as a public research institution — the findings are available to all market participants simultaneously, which is relevant for developers at different stages of their Brazil offshore wind strategies.