

Flat Rock is a reef dive off Victoria that rewards beginners with a good mix of marine life at manageable depths. The shallower sections of the reef sit at around 12 metres, with deeper water dropping to 25 metres as you gain experience and confidence. Visibility swings widely from 1 to 20 metres, so conditions can vary noticeably between visits. Keep an eye out for blue devil fish and boarfish sheltering close to the reef, cuttlefish hovering in the open, and Port Jackson sharks resting on the bottom. Swell sharks, rays, soft corals, nudibranchs, and crayfish round out what you might encounter. The current here can run moderate to strong, and surge is worth watching, so go with a guided tour until you know the site well.
-38.28512, 144.63928
Summer through autumn (December to April) brings the most settled conditions and the best chance of clear water, so plan your visit in those months if you can. Always check the current forecast before heading out, as conditions at Flat Rock can shift quickly.
Access is via boat charter from operators in Queenscliff or Portsea, such as Bay City Charters or Dive Victoria. The site is approximately 1km from the Point Lonsdale Light.
string
The primary hazards are the strong tidal currents near Port Phillip Heads and potential for low visibility. The presence of caves and overhangs requires awareness of the overhead environment.
Depth
12-25m
Visibility
1-20m
Skill Level
Beginner
Entry
Boat
Boat required
Water Temp
10-17°C
Current
Moderate
Best Time
Jan, Feb, Mar, Apr, Dec
Yes, Flat Rock in Flat Rock is a boat-access-only dive site. You will need to book with a local dive operator or charter a boat to reach it.
Flat Rock in Flat Rock is well-suited for beginner divers and snorkellers. Conditions are typically calm with easy entry and shallow depths.
Diving at Flat Rock in Flat Rock requires the following certifications: Open Water. Always dive within your training limits.
A drysuit recommended is recommended for diving at Flat Rock in Flat Rock. Water temperatures range from 10°C to 17°C.
Flat Rock in Flat Rock is home to blue devil fish, boarfish, cuttlefish, Port Jackson sharks, swell sharks, and rays. Marine life sightings vary by season and conditions.
The best months to visit Flat Rock in Flat Rock are December, January, February, March, and April. Conditions outside these months can still be good but are less predictable.
Flat Rock in Flat Rock has depths ranging from 12 metres to 25 metres.
Expect moderate currents at Flat Rock in Flat Rock. Good buoyancy control and some drift diving experience is helpful.
Visibility at Flat Rock in Flat Rock typically ranges from 1 metres to 20 metres. Conditions vary with weather, tides, and seasons.