Shelly Beach (also known as Shelley Beach is a beach located in Manly, a suburb of Sydney, New South Wales, Australia. It is adjacent to North Head and Fairy Bower. Shelly Beach is the only west facing beach on the eastern coast of Australia.

Shelly Beach is protected from the ocean swell by the reef that lies on the right hand side of the beach (when facing the ocean) and faces west. Facilities include 2 free electric barbecues, showers, toilets and a kiosk selling meals, drinks and ice cream. There is a restaurant on the beach called Le Kiosk. There is a bush track around the headland offering spectacular views of the Northern Beaches and North Head. The facilities also include parking at the rate of $8.00 an hour.

On the western point of the beach is a famous surf break known as “Bower” which offers one of the most shallow breaking waves in Sydney. Further along from Bower are Winki and Deadman’s, two other well-known breaks which are popular with surfers, especially on south-east, and east swells. Shelly beach is also the only inland facing ocean beach on the east coast of Australia.

Shelly Beach is a protected marine reserve since it is part of Cabbage Tree bay.  It is excellent for scuba divers, and also for snorkelers as Shelly beach does not get very deep, its maximum depth being about 12 meters. Many areas are shallow with depths ranging from 2 to 6 meters.This particularity makes it very popular for casual and regular snorkelers. Cabbage Tree Bay (of which Shelly is part) was declared a ‘No Take’ Aquatic Reserve on 31 March 2002. There is anecdotal evidence from regular divers that the abundance and diversity of marine life has increased significantly in this time, however no formal studies have been conducted.

There is an old motorbike standing on the seabed in the middle of the bay in around 8m of water.