Anniversary Reef Wall is one of the newer names on the Terrigal site list. The Terrigal Underwater Group records that it was named after being discovered on Terrigal Dive's 40th anniversary dive, and Muddy Puddle Diver places it off Bateau Bay in the same broad reef system as Silver Drummer Wall, Bonito Reef and The Pinnacle. At about 18 m it is one of the shallower offshore options, which makes it useful for Open Water divers and for second dives after the Adelaide or Foggy Cave.

The site is a reef wall rather than a flat reef - a line of rock rising several metres off the sand with ledges, cracks and undercuts along its face. Walls like this on the Central Coast collect sponges, sea squirts and small gorgonians on their shaded faces, while kelp and turfing algae cover the tops. The undercuts are where the fish gather: bullseyes, one-spot pullers and ladder-finned pomfrets in the shadows, red morwong and eastern blue gropers along the face, and wobbegongs resting at the base.

Published detail on the exact layout is limited, and the site is not dived as often as the classics, which gives it an exploratory feel. Navigation is straightforward, since the wall provides a natural handrail: follow it out, turn, and return along the top. For newer divers it is a chance to experience wall diving in comfortable depths; for regulars it is a less-visited alternative to Two Poles and Fifeshire.

Ask the operator about it when you want a relaxed reef dive in the Bateau Bay area and the swell allows the longer run north from The Haven.

All boat dives in this area launch from the Terrigal Haven boat ramp at the southern end of Terrigal Beach, tucked behind The Skillion headland. From the Central Coast Highway follow Terrigal Drive into Terrigal, then Kurrawyba Avenue and Terrigal Esplanade to The Haven, where there is a paid car park beside the ramp; Pro Dive Central Coast's shop is a short walk away and gear is loaded on the ramp or the adjacent beach. Private boats need a ramp with good parking early on weekends as the car park fills by mid-morning in summer.

The site is off Bateau Bay, about 12-15 minutes north of The Haven past Forresters Beach and Crackneck Point. There is no published mark; it is dived with local operators or club members.

Terrigal's offshore reefs are open to the Tasman Sea and are dived only when swell is below roughly 1.5 m; a north-east sea breeze building through the afternoon in summer and strong southerlies after a front are the usual reasons trips are cancelled, so morning departures are the norm. The Haven boat ramp is sheltered by The Skillion but the run out past the headland can be lumpy in a south-easterly. Visibility is best in late summer and autumn when the East Australian Current pushes warm blue water inshore, and worst after heavy rain when Terrigal Lagoon, Wamberal Lagoon and Avoca Lagoon open and stain the inshore water.

Winter water is cooler (around 15-17 °C) but often clear.

Descend to the base of the wall, follow it in one direction at 16-18 m, then turn at half air and return a few metres shallower along the top of the wall to the anchor.

Visited by Pro Dive Central Coast (formerly Terrigal Dive Centre, which named it) and Terrigal Underwater Group on suitable days; not on a fixed schedule.