A floating watercraft port system is provided which allows for a designer to develop a port assembly of a desired configuration. The system comprises an entry member, an extension member and a bulkhead. The entry member comprises a cradle having an entrance section; and the extension member has a cradle which extends the full length of the extension member and is open at opposite ends of the extension member. Bulkheads are positioned on the entry and/or extension members at desired positions to delineate the forward ends of watercraft receiving cradles.