Port Bannatyne lies on the Firth of Clyde, approximately 2 miles (3 km) north of Rothesay on the Scottish Isle of Bute.

On the seafront are a shop/Post Office and the community-owned Anchor Tavern which was rescued from closure by local people who formed the Port Bannatyne Development Trust in 2020.

The Port Royal Hotel was bought in 2000 by a Russo-Norwegian family who renovated the building and converted it into a replica of a Russian Tavern of Imperial Times,[4] however it closed in 2017.

The small boatyard has grown into a stone-built breakwater which encloses part of Kames Bay and provides 108 berths for craft up to 16.5m in length.

[9] The luxury Kyles Hydro Hotel, overlooking the Port, was requisitioned by the Admiralty to serve as the HQ for midget submarine (x-craft) operations.