This disclosure is directed to techniques for aggregating marine weather radar data and sea state sensor data from ships or other sea-based data collecting nodes, potentially also with non-sea-based data collecting nodes. In one example, a system is configured to receive, via a remote coverage broadband datalink system, one or more sets of marine environmental condition data from one or more sea-based data collecting nodes. The system is further configured to aggregate the one or more sets of marine environmental condition data from the one or more sea-based data collecting nodes into one or more aggregated sets of marine environmental condition data. The system is further configured to output at least one of the aggregated sets of marine environmental condition data to one or more recipient systems.