is located in Guam's capital city, Hagåtña. The marina is owned and operated by the Port Authority and houses recreational and some small commercial vessels.

is located in the Southern Village of Agat. A privately operated restaurant and gift shop are located on the Port owned property. The marina was constructed in 1992 and houses residential, recreational and some commercial vessels.

Aquaworld Marina is located in the inner Cabras Island area. It is a privately run marina under management agreement with the Port housing residential, recreational and commercial vessels.

Harbor of Refuge is located near Aquaworld and is also managed by a private company.