This is the longer sibling to the Swansea Bridge dive: a genuine drift along the full width of Swansea Channel, entering at the RSL Club wharves on the western bank and finishing roughly 1,500 m downstream at a boat ramp near Wallamuslah Street. It shares the same tidal engine room as the bridge dive — the channel drains and fills Lake Macquarie on every tide, and that constant flow is what makes the site interesting rather than a plain sand slog. Depth starts around 10 m near the bridge, drops to 6 m immediately past it, and undulates between 3 m and 14 m over a series of sand dunes for the rest of the drift, so buoyancy and depth awareness need to stay sharp throughout.The drift itself is straightforward: stay close to the rocky southern bank rather than mid-channel, both to avoid boat traffic and because the rocks hold more life than the open sand.

Along the way divers pass beneath bridge pylons, over the dune field, and past a scatter of urban debris — old shopping trolleys, car parts, tyres and bike frames — that has become an accidental artificial reef of sorts. Huge numbers of luderick, bream, flathead and whiting move through the channel, with kingfish, firefish, pipefish and even the odd tropical straggler turning up over the rockier sections. A dive here typically runs 30-45 minutes depending on current strength, and the incoming tide gives noticeably better visibility than the ebb.

This is a site for competent divers who can manage a current, plan a shuttle or long surface swim, and read a tide table properly — done at the right time it is one of the more relaxed and fish-rich shore dives on the Central Coast; done at the wrong time it becomes an exhausting fight against the current.

From Sydney on the Pacific Highway, take the right-hand slip lane into Peel Street immediately before the highway crosses Swansea Channel, which leads into the Swansea RSL Club car park; park as close to the water as possible. Enter from one of the two wharves at the RSL Club on the western bank. The drift runs roughly 1,500 m downstream (north) with the tide, staying near the rocks on the left-hand side to avoid surfacing in the middle of the channel among boat traffic, finishing at a public boat ramp near Wallamuslah Street.

Leave a second car at the exit ramp, or arrange a shuttle, since the surface walk back to the RSL car park is long.

The channel only works within a narrow tidal window: enter no earlier than about one hour before and no later than two to three and a half hours after high tide at Fort Denison (Sydney), depending on which stretch of channel is being dived — check current tide tables against the site notes before committing, as post-2004 bridge works changed the old timing rules. Outside slack water the ebb and flood run hard and diving is unpleasant and unsafe. Visibility is best on the incoming (flood) tide, which pulls in cleaner ocean water; the outgoing tide can be murky, especially after rain when Lake Macquarie's fresh water run-off dirties the surface layers.

Wind and swell outside the channel are irrelevant since the site is fully protected; the only real weather factor is heavy rain, which reduces visibility for a day or two afterwards. Diveable year-round.

Enter from the RSL wharves or the punt ramp at slack or on the first hour of the flood, drop to the sandy bottom (6-10 m near the bridge) and let the current carry you north/downstream, staying close to the rock-lined southern bank rather than mid-channel where boat traffic runs. Weave between the sand dunes and old bridge pylons, checking overhead pipes and structure for fish life, and surface at the designated ramp after roughly 30-50 minutes, well clear of the boat ramp's approach lane.

Aqua Zero Dive Centre (Swansea) runs air fills, gear hire and guided shore dives for visiting divers; Grey Nurse Charters (Newcastle) occasionally includes these sites on shore-dive days. Mostly self-guided club and personal diving.