A multidisciplinary approach to the protection and risk assessment of coastal and underwater cultural heritage, emphasizing the use of advanced monitoring, modeling, and robotic systems. This includes the integration of remote sensing techniques such as satellite and drone imagery, LiDAR scanning, aerial photography, and underwater technologies like side-scan sonar and ROVs, which enable high-resolution seabed imaging and detailed documentation of submerged archaeological structures. Robotic systems play a key role in ensuring precise and non-invasive mapping, especially in shallow, wave-dominated environments where traditional survey methods are limited. These environments benefit from the deployment of high-resolution observational tools, including wave gauges, current meters, and coastal cameras, at both offshore and nearshore stations, allowing for continuous, real-time environmental monitoring. Applications in such dynamic settings support the evaluation of site stability, erosion patterns, and sediment transport. While these technologies offer significant advantages in data quality, accessibility, and preservation of fragile heritage, they also present challenges such as operational constraints in turbulent waters, visibility limitations due to suspended sediments, and the complexity of modeling nearshore processes. Despite these limitations, the combined use of robotic, observational, and modeling systems provides a robust framework for effective conservation and risk-informed management of cultural heritage in coastal zones.