Davis Marina, now operating as North Harbour Marina, is a marina facility situated on North Harbour at Balgowlah on Sydney's Northern Beaches. It provides access to the harbour for recreational boaters and has historically offered fuel as an on-site facility.

The site has recently been the subject of a development application proposing a $257,500 upgrade, including nine additional berths, a waterside kiosk, and storage for 72 dinghies.

The proposal drew more than 300 public submissions during its exhibition period, with the majority opposing the changes due to concerns about environmental impacts. The development has since received unanimous approval from the Northern Beaches Council.