Western Gutter is named as a distinct feature within Forster Dive Centre's Seal Rocks site listing, sitting alongside the better-documented Grotto, Labyrinth and Interlinked Caves as part of the same general cave and gutter complex on the western side of the Seal Rocks reef system. Given the naming pattern and shared location, it is reasonable to treat Western Gutter as a specific access point or section within that broader cave system rather than a wholly separate dive, though independent sources consulted for this report did not provide a detailed standalone description distinguishing it clearly from its neighbours. As with the rest of the cave and grotto complex, expect a genuinely varied topographic dive with gutters, chambers and overhead sections in a depth range from the shallower entrances down toward the deeper connected passages, and grey nurse sharks are a real possibility throughout, given the whole complex's reputation for backlit shark encounters in its grottos.

Divers planning to specifically explore Western Gutter as distinct from the main Grotto/Labyrinth/Interlinked Caves dive should discuss the exact plan with Forster Dive Centre beforehand, since it is unclear from published sources whether operators treat it as a separate booking option or simply as part of the same broader cave system dive covered elsewhere in this survey. Until that is clarified, divers keen on the cave complex should simply ask to include Western Gutter specifically when booking and let the guide explain how it fits into the day's plan. Given the site's apparent overlap with better-known features nearby, it is best approached as a bonus variation rather than a headline reason to choose a Seal Rocks trip.

Boats for the Seal Rocks sites either run the longer distance down from Forster/Tuncurry (about 45-60 minutes) or launch locally from the small boat ramp at Seal Rocks village itself near Sugarloaf Point, cutting the run to Big and Little Seal Rock down to 10-20 minutes.

Seal Rocks sits on an exposed headland — trips are cancelled beyond about 1.5 m swell. Visibility is typically 15-30 m in settled weather.

Descend into the western gutter section of the cave/grotto complex and work through at 12-28 m, watching for grey nurse sharks and general Seal Rocks cave-associated marine life, connecting through to the neighbouring Grotto and Labyrinth sections if time and training allow.

Cavern-level comfort recommended given proximity to the connected cave system.

Forster Dive Centre (Tuncurry)