Quarantine Beach is a 200-meter long, sheltered harbor beach located within the historic Q Station precinct at North Head, Manly. It faces northwest into North Harbour, offering calm, clear waters that are ideal for paddling. The beach is hemmed in by rocks at each end and features a seawall and wharf at its southern end. Access for paddlers launching from shore is via the Q Station visitor area. There is a designated visitor parking area, and a shuttle bus operates from Manly Wharf. The beach itself is gently sloping, which provides a straightforward entry into the water. It is part of Sydney Harbour National Park and is an aquatic reserve, emphasizing its protected status. The waters are consistently calm and sheltered, making it a suitable launch point for less experienced paddlers, though rentals may be suspended during strong winds or storms for safety. The beach is not patrolled by lifeguards.

From Quarantine Beach, paddlers can explore nearby coastal destinations such as Store Beach, Little Manly Cove, and Collins Beach. These secluded spots are popular for picnics and enjoying the coastal scenery. The beach is adjacent to the Q Station Visitor Centre, where kayaks and stand-up paddleboards are available for hire seasonally, typically from spring through autumn. The Wharf Cafe & Bar and Boilerhouse Kitchen & Bar are located next to the beach, providing refreshments. The area is rich in historical significance as a former quarantine station, and the surrounding North Head shoreline is noted for its natural beauty. The marine environment supports diverse wildlife, including sea dragons and various fish species, making it an interesting area for snorkeling as well. Fishing is not permitted from the beach.