The harnessing of renewable sources of marine energy has become a promising solution for a number of problems, namely satisfying the increasing demand for electricity, the reduction of greenhouse gas emissions, and the provision of energy to regions unconnected to a national grid. Tropical countries have an interesting dichotomy: Despite their varied potential sources of marine energy, their environmental and social conditions impose severe constraints on the development of a renewable energy industry. Moreover, the exploitation of these opportunities is limited by national economies' reliance on fossil fuels, political and social restraints, and technological immaturity. The present work addresses challenges and opportunities common to wave energy implementation in tropical nations, as a first approach to a regional diagnosis. The motivation for this work is to encourage research on wave energy policies in the Tropics. Technical, environmental, and social challenges to be overcome in wave energy projects are discussed. The technical challenges are grouped into development, deployment, and operation stages of wave energy converters; environmental challenges are divided into biodiversity, cumulative effects, and monitoring aspects, whilst social issues include population growth and energy access matters. The Mexican strategy for developing sustainable technology throughout the wave energy production chain is also presented. 2 of 21 projects and plans for future development based on their local marine characteristics and geographical region; temperate, polar or subpolar. Most developing countries, on the other hand, are located in tropical regions (approximately between latitudes 23.5 • N and 23.5 • S), where it may also be possible to harness marine energy. In these regions stable, high temperatures and air humidity are generally found, although climate variations exist between sub-regions, due to altitude, topography, winds, ocean phenomena, geomorphology, vegetation, and anthropic changes [13].While the greatest wave energy potential is found outside the Tropics, some tropical countries have lower, but persistent, availability of resources. Indeed, wave energy converters have been successfully deployed in Indonesia [14,15], the Philippines [16], and India [17]. Recently, evaluations of ocean energy resources in tropical regions have been published. In Asia, Purba [14] evaluated the possibilities of taking advantage of ocean energy resources in Indonesia. Through database analyses, they found sites at which ocean surface waves have a mean 72 kW/m 2 available.Regarding Oceania, Hemer et al. [18] showed that some of the most energetic wave and tidal energy resources are found in the tropical and subtropical regions of this continent. SEA [19] reported that converting energy from waves is feasible along the coast of Southern Africa [20].In the tropical regions of America, Osorio et al.[21] estimated the available ocean energy resources from waves, tides, currents, salinity gradients, and thermal gradients in Colombi...