Tropical coastal ecosystems are rapidly degrading due to climate change and local pressures, while current monitoring efforts remain fragmented, habitat-specific, and disconnected from management. This paper advocates for integrated, seascape-scale observatories that link biodiversity with ecosystem function and translate observations into scientific-driven management actions. It identifies key gaps in existing monitoring systems, including limited scope, methodological inconsistency, and weak policy relevance, and proposes a transferable framework built around core ecological indicators, adaptable technology tiers, and a FAIR web-GIS platform for early warning, policy application, and community engagement. The framework includes a phased roadmap connecting local pilot sites to regional and global networks, embedding governance mechanisms for long-term sustainability. By aligning monitoring with restoration planning and adaptive management, this proposed model enhances restoration success and innovation. Global implementation, especially in developing regions, will require sustained funding, capacity building, and coordinated leadership from international organizations such as the United Nations to ensure equitable, durable outcomes.