Sailing to Stewart Island: New Zealand's Last Frontier

Most visitors to Stewart Island arrive by ferry from Bluff — a 60-minute crossing that, on a bad day, is memorable for all the wrong reasons. The Foveaux Strait is one of the roughest stretches of water in New Zealand, a 35-kilometre gap between the South Island and Rakiura where the Southern Ocean funnels through with nothing to slow it down.

Arriving by sailing yacht is different. You choose your weather window. You approach from the sea, watching the island emerge from the horizon. You anchor in Halfmoon Bay as the sun sets over Paterson Inlet and the kiwi start calling in the bush above the waterline.

This is why sailors come to Stewart Island.

Stewart Island — Rakiura in Māori, meaning "the land of glowing skies" — is New Zealand's third-largest island and one of its least-visited. Eighty-five percent of the island is Rakiura National Park. The permanent population is around 400 people, almost all in the single settlement of Oban.

For sailors, it offers:

• Genuine offshore passage-making — the Foveaux Strait crossing is a real offshore passage, not a coastal hop
• Extraordinary anchorages — Paterson Inlet alone has dozens of anchorages that see almost no boat traffic
• Wildlife — kiwi, albatross, yellow-eyed penguins, and fur seals in abundance
• Remoteness — the sense of being genuinely at the edge of the inhabited world
• Southern Ocean proximity — the next landfall south is Antarctica

The Foveaux Strait is 35 kilometres wide at its narrowest point, between Bluff and Dog Island. For a sailing yacht making 6–7 knots, that is a 5–6 hour passage — short enough to be manageable, long enough to be a genuine offshore experience.

What makes it challenging:

• Tidal streams — the Strait has strong tidal streams (up to 3 knots) that interact with the prevailing swell to create steep, confused seas in certain conditions
• Weather — the Southern Ocean weather systems that track across the Strait can build quickly; a settled forecast is essential
• Swell — even in calm conditions, a residual Southern Ocean swell is almost always present
• Shipping — the Strait is used by coastal shipping; maintain a proper watch

Best conditions: A high-pressure system sitting over the South Island, with light to moderate northwesterlies or southwesterlies. Avoid the crossing in strong southerlies — the fetch from Antarctica is unlimited and the seas can be severe.

Timing: The tidal streams run east-west through the Strait. Departing Bluff at the right state of tide can give you a useful push; departing at the wrong time adds an hour to your passage. Check the NZ Tide Tables for Dog Island.

Once you are through the Foveaux Strait and around the northern tip of Stewart Island, Paterson Inlet opens up to the east — a vast, sheltered harbour that cuts 20 kilometres into the heart of the island.

Paterson Inlet is extraordinary. It is large enough to spend a week exploring without retracing your route, and almost entirely undeveloped. The bush comes down to the water's edge. The anchorages are quiet. The wildlife is everywhere.

Best anchorages in Paterson Inlet:

• Prices Inlet — a narrow arm off the main inlet, excellent holding, completely sheltered
• Freshwater River — dinghy up the river at high water for a remarkable bush experience
• Sawdust Bay — good holding, beautiful bush surroundings, occasional kiwi calls at night
• Glory Cove — well-sheltered, good for extended stays

Halfmoon Bay is the main anchorage and the location of Oban, Stewart Island's only settlement. The holding is good on sand and mud, and the anchorage is well-sheltered from the prevailing northwesterlies.

Oban has a small supermarket (stock up before you leave the South Island — prices are higher and selection is limited), a pub, a few cafes, and the Department of Conservation visitor centre. The DOC centre is worth a visit for information on the island's wildlife and walking tracks.

Provisioning note: Bring everything you need from Invercargill or Bluff. The Oban supermarket is adequate for top-ups but not for full provisioning.

Stewart Island has some of the best wildlife viewing in New Zealand:

Kiwi: Stewart Island has the highest density of kiwi in New Zealand. Unlike their mainland cousins, Stewart Island kiwi are often active during the day. Mason Bay, on the island's west coast, is the best place to see them — accessible by water taxi or a long walk from Oban.

Albatross: Southern royal albatross nest on the outlying islands and are regularly seen soaring over the Strait and around the island's coast.

Yellow-eyed penguins: One of the world's rarest penguins, yellow-eyed penguins (hoiho) nest on Stewart Island. They come ashore at dusk; anchor quietly and watch from the cockpit.

Fur seals: Colonies throughout the island, particularly on the rocky headlands of the south coast.

Southern Passages Expeditions runs crewed passages to Stewart Island from Lyttelton — a 2–3 day coastal passage south to Bluff, the Foveaux Strait crossing, and a week exploring Paterson Inlet and the island's anchorages before returning north.

These are working passages. You will stand watches, handle sails, navigate, and anchor. The skipper is alongside you, but you are not a passenger — you are crew. By the time you return to Lyttelton, you will have logged genuine offshore sea miles in some of the most demanding and rewarding waters in the Southern Hemisphere.

Passages are priced from $6,500 per person. Register your interest to be notified when 2026/27 dates are confirmed.

Charts: NZ 69 (Foveaux Strait), NZ 692 (Stewart Island), NZ 6921 (Paterson Inlet)

Weather: MetService marine forecasts for Foveaux Strait are essential. The Bluff Harbour Radio broadcasts weather on VHF at scheduled times.

Fuel: Available at Halfmoon Bay wharf. Call ahead to confirm availability.

Water: Good water is available at Halfmoon Bay. Carry adequate tankage for extended Paterson Inlet exploration.

Communications: Cell coverage is limited to Halfmoon Bay and parts of the north coast. Carry a VHF radio and consider a satellite communicator for the Foveaux Strait crossing.

Stewart Island is not for everyone. It is remote, the weather is unpredictable, and the Foveaux Strait demands respect. But for sailors who want to experience New Zealand at its most wild and most beautiful, there is nowhere quite like it.

The glowing skies of Rakiura are worth every mile.