Bantry Bay is the wildest water in Sydney Harbour’s whole system — a deep, bush-locked finger of upper Middle Harbour inside Garigal National Park, with no road to its shore, a row of century-old explosives magazine buildings standing silent on the western bank, and public moorings swinging in water that’s often dead flat when the main harbour is blowing twenty knots. No one hires boats from Bantry Bay — nothing is there, which is the point. You hire downstream and cruise up: our self-drive fleet at The Spit Reserve is the closest base, and Bantry is comfortably inside a Coral or Axopar day. Here’s the full picture.
Boats for a Bantry Bay run
Pricing, photos and open dates across the fleet.
What’s the story with Bantry Bay?
The bay owes its emptiness to gunpowder. From the early 1900s it was Sydney’s explosives storage depot — the handsome brick magazine buildings and their wharves still line the western shore, kept deliberately far from the city and connected only by water. When the depot closed in the 1970s the surrounding bush became national park, and the result is an accident of history you can float in: a deep, sheltered harbour bay that never got houses, roads or marinas. The magazine precinct is fenced heritage — you look from the water rather than land — but as a backdrop it’s unbeatable: silent buildings, thick bush, and water so still the reflections go all the way down. Sydney has nowhere else like it within twenty minutes of a wharf.
How do you get there and where do you tie up?
From The Spit Reserve, head upstream under the Spit Bridge — small boats fit under without an opening — then follow Middle Harbour’s main channel past Clontarf and Seaforth. Where the waterway bends towards Sailors Bay, Bantry Bay opens to the north, running deep between Garigal’s ridges. The bay holds public courtesy moorings, and they’re the right way to stay: pick one up if it’s free (they’re first-come, time-limited — follow the tag conditions) rather than anchoring, because the bay is deep and the bottom drops away quickly. If you must anchor, do it towards the head of the bay in lesser depth, on mud, well clear of moored boats. The whole bay is slow, quiet water — treat it as a no-wash zone throughout, which the signposting on the water will confirm. Rowers, kayakers and the occasional swimmer share it, and sound carries absurdly well between the ridges.
What do you actually do in Bantry Bay?
Blissfully little — that’s the product. The routine that works: secure the mooring mid-morning, swim off the back of the boat in deep, cool, green water, then lunch from the ice box while the bush does its thing around you. Binoculars earn their keep here — sea eagles and kookaburras work the ridgelines, and the magazine buildings reward a slow look. There’s no landing infrastructure for casual visitors, no kiosk, no facilities: carry everything in and out, and check NSW National Parks guidance if you’re hoping to do anything ashore beyond looking. Fishing the drop-offs at the bay’s mouth is a quiet-day staple for locals. If the group gets restless, Sugarloaf Bay — the neighbouring drowned valley, one headland west — adds a second wilderness anchorage ten minutes away, and Clontarf’s beach is on the way home for a sandy swim.
Which boat suits a Bantry Bay day?
For up to six people, the Coral is the honest answer: no licence needed, from $400 for a 3-hour hire with fuel included, full training at the wharf, BYO welcome with the ice box aboard — and Bantry-and-back with a long swim stop fits a three-hour window with room to spare. Licensed skippers with up to eight aboard take the Axopar 28 from $795 and typically make Bantry the morning half of a bigger day. If nobody wants to drive, skippered charters from the 180+ boat fleet will include upper Middle Harbour on request — small BYO boats around $200–$400 an hour, catered cruisers $500–$900, winter typically 20–40% below summer. The one wrong answer is a big party boat: Bantry is a stillness destination, and the groups that love it are the ones who came for exactly that.
When is it at its best?
Winter mornings, unfashionably. The bay’s shelter means it’s usable year-round, but June to August delivers the full effect — mist on the water, moorings empty, kingfishers working the shallows, and hire rates at their seasonal low. In summer it’s the harbour’s best escape hatch: when the nor’easter turns the main harbour to chop by early afternoon, Bantry stays workable, so savvy hirers flip the usual plan and save it for the windy half of the day. Weekend middays are as busy as it gets, which by Bantry standards means a handful of boats. After heavy rain, give swimming a couple of days, as with any upper-estuary water.
How does Bantry Bay compare with Middle Harbour’s other stops?
Think of it as the deep end of a graduated scale. Chinamans and Clontarf are the social beaches — sand, families, easy landings, five minutes from the wharf. Sugarloaf Bay is the transition: bush-walled and quiet, but with Castlecrag’s rooftops occasionally visible and kayak traffic from the suburbs around it. Bantry is the far end — no houses at all, no road access, heritage buildings standing empty on the shore, and a hush the others can’t match; it’s the only stop on the waterway where a weekday visit can genuinely mean seeing no other moving boat for an hour. That gradient is worth using deliberately. Groups with kids usually want the beaches for most of the day and Bantry as a twenty-minute wow-detour; couples and small crews tend to invert it, making Bantry the long lunch and hitting a beach briefly on the way home. Photographers and slow-morning people should just come straight here. The one thing Bantry doesn’t do is landings and lawns — for grass under your feet, Clontarf and Davidson Park hold that role. Knowing which job each bay does is the difference between a good Middle Harbour day and a perfect one, and it’s exactly the kind of routing we talk through at the wharf briefing before you set off.
Frequently asked questions
Can I visit the explosives magazines?
They’re heritage structures inside the national park and not open for casual wandering — enjoy them from the water and check NSW National Parks for any access arrangements.
Are the moorings free to use?
The courtesy moorings are public, first-come and time-limited — read the conditions on the tag and move on when your window’s up. Don’t tie to private moorings elsewhere in Middle Harbour.
Do I need a licence to get there?
No — the Coral reaches Bantry Bay licence-free with up to 6 aboard. You’ll get full training at The Spit before you leave.
Is Bantry Bay swimmable?
Yes, off the boat — deep, clean, calm water. Standard rule: skip swimming for a couple of days after heavy rain.
How long is the trip from The Spit?
Around 20–30 minutes at the respectful pace the upstream zones require. A 3-hour Coral hire covers it comfortably, including a proper swim-and-lunch stop.