Penarth Quays Marina: Penarth Quay provides berthing facilities, weather predictions and boat sales in the beautiful and sheltered historic Cardiff Bay. 25% discount on standard rates for vessels <6m. Marina is manned 24/7 by friendly, professional marina staff. Free visitor berthing at other Quay Marinas. One month’s storage ashore included in annual berthing price. Discounted winter rates. New berth holders welcome.