Dive slate · divesites.com.au · printed 7 Nov 2026
Ballast Head
Kangaroo Island, South Australia · near Kingscote
| Depth | 1–10 m |
|---|---|
| Minimum level | Open Water |
| Difficulty | Beginner |
| Access | Shore or Boat |
| Entry | Rocky shore entry or short boat run from Kingscote/American River |
| Current | Mild |
| Visibility | 5-12 m |
| Water | summer 17-20 °C, winter 13-14 °C |
| Suit | 7 mm wetsuit with hood most of the year; 5 mm acceptable Feb-Apr; drysuit popular in winter |
| Best season | Year-round in calm weather |
| Bottom time | 50 min |
| Position | -35.76040, 137.76610 (GPS) |
| Permit | None required (check marine park zoning) |
| Nearest chamber | Royal Adelaide Hospital hyperbaric medicine unit (Adelaide) – aeromedical retrieval from Kingscote (Kangaroo Island Health Service) is required; ~45 min flight. DAN/Divers Emergency Service 1800 088 200. |
| Emergency | 000 · DAN Asia-Pacific diving emergency 1800 088 200 |
Ballast Head
Also known as Ballast Head (Nepean Bay)
A sheltered, little-documented headland reef in Nepean Bay near Kingscote.
Near Kingscote · Kangaroo Island, South Australia
- Depth
- 1–10 m
- Minimum level
- Open Water
- Access
- Shore or Boat
- Boat ride
- —
- Water
- 17-20 °C
- Visibility
- 5-12 m
Ballast Head1–10 m · Open Water · Shore
Dive factsDepths, conditions, location & safety
Season
In season nowBest months: year-round.
Dive facts
- Depth
- 1–10 m
- Typical depth
- 5 m
- Certification
- Open Water
- Difficulty
- Beginner
- Depth tier
- Easy (0–10 m)
- Access
- Shore or Boat
- Dive centre needed
- No – independently diveable
- Shore / independent
- Possible (experienced only)
- Current
- Mild
- Visibility
- 5-12 m
- Water temp (summer)
- 17-20 °C
- Water temp (winter)
- 13-14 °C
- Water
- Temperate
- Bottom time
- 50 min
- Dive traffic
- Rarely dived (private boat/club only)
- Night dive
- No
- Snorkel friendly
- Yes
Exposure suit
7 mm wetsuit with hood most of the year; 5 mm acceptable Feb-Apr; drysuit popular in winter
Location
Nepean Bay – Ballast Head
-35.76040, 137.76610
Published GPS position.
Open in Google MapsPrimary source: en.wikipedia.orgMarine park & permits
None required (check marine park zoning)
Nearest recompression chamber
Royal Adelaide Hospital hyperbaric medicine unit (Adelaide) – aeromedical retrieval from Kingscote (Kangaroo Island Health Service) is required; ~45 min flight. DAN/Divers Emergency Service 1800 088 200.
Diving emergency: call 000, then DAN AP 1800 088 200.
Trip planner
Build a trip around Ballast Head →
A day-by-day plan for Kangaroo Island with this site locked in.
This guide is a planning aid. Conditions change daily — confirm with a local dive centre and dive within your training. Data & safety notes.
Dive profile
How this site rates
Scores are computed from the recorded data, not opinions. How?
At a glance
Ballast Head is a reef shore dive for experienced divers in Kangaroo Island, SA, 1–10 m, suited to Open Water divers.
Rated beginner: sheltered, shallow and manageable for a newly certified diver on a normal day, though note boat traffic overhead and cold water.
Why dive here
- A sheltered, little-documented headland reef in Nepean Bay near Kingscote.
- Snorkel-friendly, so non-diving companions can join at the surface.
- Rarely dived: expect to have the site to yourself, and plan your own logistics.
About Ballast Head
Ballast Head is a headland on the southern shore of Nepean Bay, about 19 km south-east of Kingscote, taking its name from the ballast stone once quarried here for ships. The locality includes two South Australian heritage sites – a fish canning factory site and the ruins of Jacob Seaman's hut – reflecting its early industrial and settler history.
Like the rest of Nepean Bay, the waters around the headland are sheltered from the south-westerly swell, shallow, and fringed by seagrass meadows and low reef. Expect brown algae and small kelp on the rocks, sponges in shaded spots, and the bay's typical fish – leatherjackets, wrasse, whiting, old wives – along with cuttlefish, rays and possibly weedy or leafy seadragons in the weed. The Kangaroo Head area to the east is known as one of the best places for leafy seadragons, and similar habitat occurs along this shore.
Access is informal and parts of the coast are private farmland, so check before crossing land. The site's value lies in its shelter and in being an alternative to Kingscote's jetty on a calm day. It suits Open Water divers and snorkellers happy to explore a little-documented reef. Divers who find good sites here are encouraged to share their observations with the local dive shop or the Marine Life Network so the site can be better documented.
Getting there & entry
A headland on the south side of Nepean Bay, 19 km south-east of Kingscote (35°45′37″S 137°45′58″E), with shallow sheltered reef.
From Kingscote drive south-east about 19 km on the Hog Bay Road towards American River, then turn north on local roads to the Ballast Head coast. Access to the water is informal – park clear of private property and carry gear to a sheltered entry – or launch at Kingscote or American River and run a short distance across Nepean Bay.
Entry: Rocky shore entry or short boat run from Kingscote/American River
Facilities: None at the headland; services in Kingscote or American River.
Weather, swell & tides
Ballast Head sits inside Nepean Bay and is sheltered from the prevailing south-westerly swell. North-easterly to northerly winds blow across the bay and create chop and poor visibility at the headland. Visibility is best after several calm days and on higher tides.
Summer afternoon sea breezes add chop, so mornings are better.
Best season: Year-round in calm weather
If it's blown out
Sheltered or shore sites within 25 km that often work when Ballast Head doesn't.
- Kingscote Jetty · 16 km · Max 8 m
- American River · 2 km · Max 8 m
- Kangaroo Head · 10 km · Max 12 m
- Penneshaw Jetty · 16 km · Max 6 m
How the dive is usually run
Enter from a sheltered spot beside the headland, follow the reef edge at 3-8 m, and return to the entry; check seagrass edges for seadragons.
Marine life
- Seagrass
- brown algae
- leatherjackets
- wrasse
- King George whiting
- old wives
- cuttlefish →
- rays; seadragons possible
Linked species have their own page listing every site where they are recorded. All marine life →
Training required
Shallow enough for snorkellers and for a first dive under supervision. Any certified diver can dive it.
Courses that help here
- Drysuit Diver – Cold water; locals dive dry for much of the year.
- Peak Performance Buoyancy – Silt and low visibility punish poor trim.
Depth tiers: 0–10 m easy · to 18 m Open Water · 18–30 m Advanced (25 m+ is a deep dive) · 30–40 m Deep specialty · 40 m+ technical. All courses
Hazards & warnings
Informal access over private land; boat traffic in Nepean Bay; low visibility after northerly winds; limited documentation.
Dive centres that go here
No regular operator; Kangaroo Island Dive & Adventures (Kingscote) – guided north-coast boat and shore dives (confirm current trading) can advise.
Operators recorded for Ballast Head
Other dive centres in Kangaroo Island
Map
7 pinned sites. Pins marked approximate on their pages show the general area only; not for navigation.
Satellite views
Ballast Head: frequently asked questions
How deep is Ballast Head?
Ballast Head reaches a maximum depth of 10 m, with the shallowest part at about 1 m; most of the dive is spent around 5 m.
What certification do I need to dive Ballast Head?
Open Water is the recommended minimum. Rated beginner: sheltered, shallow and manageable for a newly certified diver on a normal day, though note boat traffic overhead and cold water.
Can I shore dive Ballast Head?
Experienced divers do dive Ballast Head from the shore, but the entry or conditions make it unsuitable for newer divers without local guidance. Entry: Rocky shore entry or short boat run from Kingscote/American River.
When is the best time to dive Ballast Head?
Year-round in calm weather.
What marine life will I see at Ballast Head?
Regularly recorded: Seagrass, brown algae, leatherjackets, wrasse, King George whiting, old wives, cuttlefish, rays; seadragons possible.
What wetsuit do I need at Ballast Head?
7 mm wetsuit with hood most of the year; 5 mm acceptable Feb-Apr; drysuit popular in winter.
How cold is the water at Ballast Head?
Typically 17-20 °C in summer and 13-14 °C in winter.
What are the main hazards at Ballast Head?
Informal access over private land; boat traffic in Nepean Bay; low visibility after northerly winds; limited documentation. See the hazards section above for the full list.
Where is the nearest recompression chamber to Ballast Head?
Royal Adelaide Hospital hyperbaric medicine unit (Adelaide) – aeromedical retrieval from Kingscote (Kangaroo Island Health Service) is required; ~45 min flight. DAN/Divers Emergency Service 1800 088 200. In an emergency call 000, then DAN Asia-Pacific on 1800 088 200.
Diving in Kangaroo Island
Kangaroo Island has clear water, granite reefs, sea lions and leafy seadragons, and almost nobody dives it. The north coast around Kingscote, Emu Bay and Western River Cove is the sheltered side; the Kingscote jetty is a good easy dive, and the wrecks of the Loch Vennachar and Portland Maru sit on the wild south and west coasts.
Getting there: Ferry from Cape Jervis or a flight from Adelaide. Limited dive services on the island; bring gear and a compressor plan.
Sources
Data confidence: Low · Being verified: No published dive description found; depths estimated; name origin from general knowledge.. Last updated September 2026. Know this site better? How to send a correction
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