Make your own way to the dock to board your 37-foot (11.3-metre) Naiad Rigid Inflatable Boat, a vessel designed for conditions in the Southern Ocean, with comfortable seating for up to 24 passengers, full sun protection, and onboard restroom facilities.
Depart from the Granite Island Causeway and cruise slowly between the mainland and the northern side of Granite Island, taking in views of both the Victor Harbor shoreline and the island. Your first stop is Seal Rock, where New Zealand fur seals and Australian sea lions bask on the rocks and swim past your boat.
Continue past the Bluff and Wright Island, and pass through Shark Alley where your captain shares informative commentary about the region's whaling history.
Go past Petrel Cove to West Island, a conservation park that is home to a research station. Most visitors don't venture to this remote area, but it offers a chance to see another colony of seals and sea lions, numerous seabirds, and pods of common and bottlenose dolphins. Head further west to check out the towering cliffs of Kings Beach and Waitpinga before returning to Granite Island.
From June to October, southern right whales migrate through the region. If there have been recent sightings, your captain will steer the boat to locations where you can look for whales, such as Horseshoe Bay and Bashams Beach. Your tour ends with return to your starting point after 1.5 hours.