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Boat-accessed, overhead-style swimthrough that rewards calm water, clean trim, and a slow read of the tighter section.
About Matts Crack
A surface-open crack in the Poor Knights with a bright blue interior, narrowing walls, and strong silhouette potential for photographers. The route is easy to follow but still feels like an overhead-style swimthrough, so it suits calm water, steady buoyancy, and a careful pace through the tighter section. It is best run as a boat dive when the skipper can pick a settled window.
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Research Estimate At Matts Crack
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 35m
AccessModerate entry effort
Aquatic LifeExceptional variety
FacilitiesBasic facilities
Where Is Matts Crack?
This spotNearby spots
Community sourced coordinates.
Matts Crack Planning Details
Depth range, seasonality, and planning context.
Reported Depth
15m - 18m
Depth Note
The open end is about 15 m deep, and the deeper inner section reaches around 18 m while the crack stays open to the surface.
Best Season
Late spring through early autumn, when calmer boat windows are more common and the water is often clearest.
Typical Conditions
Calm water and strong light make the blue glow stand out; the crack can feel more active when swell or flow picks up.
Safety & Access At Matts Crack
Hazards, restrictions, and access requirements.
Key Hazards
Overhead environment
Safety Notes
This is a confined crack-like feature; stay buoyant, keep buddy contact, and do not force the tightest sections if conditions are not settled.
Access Restrictions
Boat access only through a reserve-compliant Poor Knights operator.
Legal Notes
Poor Knights marine reserve rules apply, including no landing, no fishing, and no careless anchoring.
Local Intel For Matts Crack
Community notes to help plan your visit.
Scuba Diving
The site is best as a guided swimthrough: follow the crack from the open end, keep your trim centered, and treat the tighter sections as a visual pass rather than a place to linger.
Freediving
Not a freedive-first site; the overhead-style crack and boat logistics make scuba the better choice.
Snorkeling
Not a snorkel-first target. The main feature is underwater, so snorkelers will get much less from it than scuba divers.
Wildlife at Matts Crack
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Matts Crack
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Matts Crack
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility35m
Activity
No dive activity logged yet.
