The exclusion of ocean metrics from climate governance frameworks limits the ability to anticipate and respond to cascading risks associated with marine heatwaves, sea-level rise, acidification, and deoxygenation. These processes have profound ecological and socioeconomic consequences, including reduced resilience of marine ecosystems and increased vulnerability of coastal communities. Without systematic tracking and reporting, nations are unable to adjust policies or implement effective adaptation strategies, leaving critical gaps in preparedness for extreme events and long-term climate impacts.