America Bay is the anchorage people whisper about: a deep, bush-walled pocket on the western side of Cowan Water in Ku-ring-gai Chase National Park, famous for the waterfall that spills over a sandstone ledge at its head after rain. There’s no road, no houses, no phone signal worth mentioning — just moorings, still green water and the kind of quiet that makes a boat feel like the smartest thing you ever borrowed. It’s reached from Broken Bay and Pittwater, not from Sydney Harbour, and this guide covers the run in, where to moor or anchor, the waterfall walk, and the honest logistics of doing it on a hired boat.
Boats for wild-anchorage days
Pricing, photos and open dates across the fleet.
How do you get to America Bay by boat?
The bay opens off the western shore of Cowan Water — the broad reach where Cowan Creek heads for Broken Bay — a little south of West Head. From Pittwater, round Barrenjoey’s inside line, cross Broken Bay’s entrance reach and turn into Cowan Water past West Head; America Bay is one of the first deep inlets on your port side, and the whole run from Palm Beach takes well under an hour in most boats. From the Cowan Creek side — Bobbin Head, Cottage Point or Akuna Bay — you simply run downstream and the bay appears on the western shore before the water opens out. The entrance is honest and deep; once inside, the ridges close around you and the water flattens no matter what Broken Bay is doing outside. That last part matters: the crossing at the Broken Bay end can be lumpy when wind meets tide, so small boats should pick their weather, and the sheltered Cowan Creek approach is the calmer option on a breezy day.
Where do you moor or anchor?
America Bay carries public courtesy moorings, and they’re the right call — the bay is deep almost to its edges, which makes anchoring more work than most casual crews expect. If the moorings are taken, anchor towards the head of the bay where the depth eases, on mud, with generous scope, and check your set before the swim starts; the deep water and afternoon bullets of wind coming over the ridges will find a lazy anchor. Follow the time limits tagged on the moorings — the courtesy system only works because people move along. The bay is a no-hurry zone in spirit and mostly in signage too: idle wash, quiet music, sound carries. Overnighting boats rate it just behind Refuge Bay among Cowan’s sleepover spots, and its west-facing head means you get the last of the light long after the eastern shore has gone grey.
What about the waterfall — is it worth it?
After rain, absolutely; in a dry spell, temper expectations — it thins to a trickle down a stained sandstone wall. The fall drops over a ledge near the head of the bay, and a short, rough track leads up from the shore to the top of the falls, where flat rock, pools upstream and a ridiculous view down the bay make one of the great sandwich spots in greater Sydney. Climbing around waterfalls is exactly how boating days end in ambulances, so: decent footwear, no scrambling on wet rock faces, and drones’ worth of caution near the edge — it’s a genuine drop. Down at water level, swimming off the boat is the default; the water is deep, dark and cool, and the moored-boat etiquette is to swim your own patch rather than laps of the bay. It’s national park end to end — carry out everything, fires nowhere, and check NSW National Parks for anything beyond a paddle-and-picnic.
Can you do America Bay on a hire boat?
Yes — from the right side. Hire boats operating on Pittwater and the Hawkesbury/Cowan system can reach it; ask the local operator about their permitted area and the Broken Bay crossing before you book, because policies differ and the crossing is the crux for small boats. What can’t happen is starting on Sydney Harbour: the harbour and Broken Bay connect only by open ocean, off-limits to hire vessels from both directions, ours included. If you’re city-based and the northern logistics don’t stack up, the harbour holds a genuinely comparable card: Bantry Bay and Sugarloaf Bay in upper Middle Harbour are the same drowned-valley geology — bush to the waterline, public moorings, deep still water — twenty minutes from our base at The Spit. The Coral does that run with no licence from $400 for three hours, fuel included; skippered options across the 180+ boat fleet run roughly $200–$400 an hour for small BYO boats and $500–$900 for catered cruisers. It’s not America Bay’s waterfall — it’s the city’s own version of the silence.
When is America Bay at its best?
The cheeky answer: about two days after decent rain, on the first still weekday morning. That’s when the fall runs properly, the water’s settled, and the moorings sit empty. Summer weekends are the bay’s busiest — the moorings go early and the raft-ups follow — so arrive before mid-morning or come on the shoulder. Autumn is the connoisseur’s season on all of Cowan: water still warm, westerlies not yet arrived, boats mostly back at work. Winter mornings are mist-and-mirror territory and utterly worth the beanie. One structural tip for any season: make America Bay the destination, not the stopover — it rewards the crews who stay three hours over the ones who tick it in twenty minutes.
Frequently asked questions
Are there public moorings in America Bay?
Yes — courtesy moorings, first-come and time-limited. Use them ahead of anchoring where possible; the bay is deep and the moorings save a lot of anchor drama.
Does the waterfall always run?
No — it’s rain-fed. After a wet week it’s a proper cascade; in a dry month it’s a trickle. Time the visit to the weather if the fall is the point.
Can you swim there?
Yes, off the boat — deep, clean, cool water. As with any enclosed water, give it a couple of days after heavy rain, ironically just when the waterfall peaks. Pick your compromise.
Can I reach it from Sydney Harbour on a hire boat?
No — that’s an open-ocean passage hire boats can’t make. Hire on Pittwater or the Hawkesbury side, or do the equivalent bush-mooring day in upper Middle Harbour from The Spit.
Is it good for an overnight stay?
Boaties rate it highly — sheltered, west-facing light, and silence. For hire boats, overnighting depends on the operator; see overnight boat hire for how that works on our fleet.