Delwood Beach is the pocket of sand and grass on the Manly Scenic Walkway between Fairlight Beach and Manly Cove, a place most people pass on the way to somewhere else, and Vizzbud lists it as 'a popular site for introducing newer divers to the harbour environment'. The bottom is patchy reef and sand at 3–12 m with wharf pylons that host the harbour's small animals, and the western end runs into the boulder field that the VIZ club describes extending from the Fairlight reef toward Delwood, so the two sites can be dived as one for those with the air. The life is the North Harbour reserve's: White's seahorses on the pier pylons, blue-ringed octopus under the rocks, cuttlefish and octopus at night, Port Jackson sharks in winter, leatherjackets, old wives, bream and yellowtail, with the bigger reef fish and the two small wrecks a few hundred metres west at Fairlight.

Vizzbud rightly notes it is best at night when the macro life is active and the day-time boats have gone. It offers nothing that Fairlight does not, but it is quieter, has an easier sand entry than the Fairlight Crescent platform, and gives a second choice of parking on busy days. It is inside the aquatic reserve, so nothing may be taken.

Delwood suits beginners, night divers and photographers of small things; the address given by Vizzbud ('Seaforth') is wrong – the beach is in Fairlight. Practically, most divers treat Delwood and Fairlight as one long shoreline: enter at whichever has the parking, dive west or east along the reef at 5–9 m, and exit at the other, walking back along the Manly Scenic Walkway in wetsuits – a five-minute stroll that makes a one-way dive easy and safe.

From Manly follow Sydney Road/Lauderdale Avenue to Fairlight and turn down to Delwood Beach Reserve (Cliff Street/Lauderdale Avenue area; street parking, limited on weekends), or walk 10 minutes west from Manly Wharf along the Manly Scenic Walkway. Steps lead down to the small beach. Enter from the sand or giant-stride from the adjacent wharf and follow the reef and pylons; the Fairlight boulder field lies to the west.

Exit onto the beach.

As for Fairlight: sheltered from the north-easter and most swell on the North Harbour shore, chopped by a strong southerly, with visibility of 3–8 m that is best on a winter flood tide and poor after rain. Day-time boat traffic in the cove; night dives are quieter. High tide is preferred so the shallow inshore reef has water over it and the flood has brought cleaner water up North Harbour.

Enter from the beach, check the wharf pylons for seahorses at 3–5 m, then follow the patchy reef and sand west toward the Fairlight boulder field at 7–10 m and back, or east along the shore toward Manly Cove; surface near the beach.

Used occasionally by Dive Centre Manly and Pro Dive Manly as an alternative training and night-dive site to Fairlight; independent divers.