South Horn is a premier offshore dive and snorkel site perched on the exposed outer edge of the northern Great Barrier Reef, near Lizard Island (Jiigurru). This remote reef pinnacle features dramatic walls dropping into deep ocean waters, with a sloping coral shelf starting at around 12 metres and tumbling into the abyss. The site is renowned for encounters with large pelagic marine life — grey reef sharks, giant trevally, and seasonal minke whales — as well as stunning coral gardens on the upper slopes. Because of its open-ocean exposure, South Horn delivers exhilarating drift snorkels and world-class visibility, but demands confident swimmers and favourable conditions.
South Horn
AdvancedGO
GO
It's a go.
Showing last known conditions
Wave Height 0.0 mSwell Period 6.5 sWind Speed 2.0 knPrecipitation 1.3 mmTidal Phase flood
Last evaluated
The spot
Community-maintained
Community contribution: submitted by Daniel
Know before you go
Logged by the community, confirmed by mods
Moderate risk: Strong tidal currents
Strong currents sweep across the exposed outer reef face, particularly on the ebb tide. Drift snorkelling is common but requires experience.
Moderate risk: Ocean swell and wind chop
South Horn is exposed to the Coral Sea. Swell and wind chop can create dangerous conditions, especially during the summer cyclone season.
Low risk: Remote location
The site is remote with no immediate emergency services. Evacuation to Lizard Island or Cairns may take hours.
Low risk: Large pelagic sharks
Grey reef sharks and other large pelagics are common. While not typically aggressive, their presence can be intimidating for inexperienced snorkelers.
Wildlife Guide
No wildlife notes for this spot yet.
Gallery
Be the first to share a photo
No photos yet — yours could be the first.
Photos are reviewed by moderators before they appear.
Getting in
Boat
Entry
South Horn is an offshore reef site near Lizard Island (Jiigurru), approximately 270 km north of Cairns. Accessible only by private charter boat or liveaboard dive vessel from Cairns or Lizard Island resort. The resort can be reached by light aircraft from Cairns.
Parking & facilities
No parking on site. Park at Cairns or Port Douglas airport if flying to Lizard Island, or at Lizard Island resort limited parking.
toilets
Access via Lizard Island resort dive charters or liveaboard packages. No public ferry service. Day charters and resort excursions require booking in advance.
Spot Map
Community
Trust
Is this spot real, accurate, still loved?
Spots near Queensland
No nearby spots yet.
Needs verification
Quick verify
One tap helps the community keep this spot honest.
About this data
- Conditions last evaluated
- Spot data last updated
- Data sources
- Open-Meteo (marine & weather conditions), tide predictions via UTide, community contributors (descriptions, hazards, marine life).
- License
- Spot content licensed under CC BY-SA 4.0. How's the Spot is open source.
Weather & swell ┬╖ Open-Meteo marine & weather APIs Tides ┬╖ UTide harmonic analysis Sea & safety ┬╖ community reports