June 2025: Nice, capital of the world ocean

We outline the critical importance of the ocean for planetary health, economic prosperity, and human well-being, while highlighting the urgent threats it faces from climate change, pollution, overfishing, and poor governance. It presents the One Ocean Science Congress (OOSC) and the 3rd United Nations Ocean Conference (UNOC3), scheduled for June 2025 in Nice, France, as pivotal events aimed at promoting ocean sustainability through science-based policy, innovation, and global cooperation. The OOSC will deliver scientific recommendations to Heads of States and Govern-ments, while additional high-level events—the Ocean Rise and Coastal Resilience Summit and the Blue Economy and Finance Forum—will address climate adaptation and sustainable investment. The outcome of these efforts will be the Nice Ocean Action Plan, comprising a political declaration, voluntary commitments, and strategic priorities focused on multilateral processes, financial mobilization, and enhanced scientific knowledge to advance the Sustainable Develop-ment Goal 14 and ensure a resilient, thriving ocean for future generations.