Lennox Head Reef lies off Lennox Point and the adjacent Boulder Beach, roughly midway between Byron Bay and Ballina and within the southern reaches of the Cape Byron Marine Park, but it is a site that exists more on paper and in the memory of local divers than as a regularly bookable charter. Lennox Point's fame as one of the best right-hand point surf breaks in Australia is itself the reason the reef beneath it is so rarely dived — the same swell and bathymetry that wraps into a long surf break makes the water here consistently too rough for comfortable diving. On the handful of days each year when the swell drops away completely, the reef reveals a typical Far North Coast boulder-and-gutter system running from about 8 m down to 18 m, with the kind of subtropical marine life found at the better-known Julian Rocks and Ballina sites: wobbegong sharks resting under ledges, turtles moving through, bull rays working the sand patches between boulders, and schools of kingfish and snapper over the structure.

Occasional grey nurse sharks are reported moving along this stretch of coast between the more established aggregation sites to the north and south. Because no dive centre runs a standing schedule here, anyone wanting to dive Lennox Head Reef needs either a private boat and good local knowledge of the reef's position, or a willing charter operator prepared to make the run from Byron Bay or Ballina on a rare calm day. Documentation of the site's precise boundaries, exact depths and marine life is consequently thin, and prospective divers should treat the details here as indicative of the general character of this stretch of coast rather than a verified site description; anyone planning a trip should check current conditions and access with a Byron Bay or Ballina operator first.

Boat access only. Charters would run from Byron Bay (Sundive/Byron Bay Dive Centre, roughly 30 minutes south) or a private boat launched at Ballina's Richmond River ramps and run north past Lennox Head; there is no dedicated ramp at Lennox Head itself suitable for a dive boat.

Byron Bay and the coast either side is exposed to easterly and south-easterly swell; the more remote sites away from the shelter of Cape Byron and Julian Rocks need under about 1.5 m swell and light winds to be diveable and are cancelled well before the rocks themselves. The East Australian Current runs strongly along this coast, especially November-May, and can add significant drift to any exposed pinnacle or headland site. Visibility improves after a run of settled offshore (westerly) winds and degrades for several days after the Brunswick River or Belongil Creek flood following heavy rain.

Winter (Jun-Sep) brings the clearest water, grey nurse sharks and migrating humpback whales; summer (Dec-Mar) is warmer with leopard sharks and more current. Lennox Point is a renowned surf break, which by definition means it receives regular swell; the reef is realistically diveable only when that swell drops well below the level surfers want.

Drop onto the boulder reef and gutters at 8-10 m, work down to 18 m checking ledges for wobbegongs and bull rays, and return shallow for the ascent, staying alert for surge on the exposed point.

No scheduled charter; occasionally dived by Byron Bay operators or private boats out of Ballina when conditions and demand align.