Manly Beach. Manly is at the northern end of Sydney Harbour and has a harbour beach and one of Sydney's longest and most beautiful ocean beaches. The surfing beach at Manly is about three kilometres long and has three names, North Steyne, South Steyne and Queenscliff. It is an ideal `city escape' for visitors who enjoy swimming, surfboarding or windsurfing and is the gateway to the Northern Beaches. Manly has numerous restaurants, cafes and pubs - some with discos.