Mauritius · Mauritius · Drift · Reef
Big Rock
A drift run deep to 26 m or shallow to 20 m
Area photo: Diego Delso · CC BY-SA 4.0
Big Rock is a drift dive off Flic en Flac that is run at two levels: a deeper pass with a maximum of 26 metres or a shallower one with a maximum of 20. The rock architecture is what both profiles follow, and the current does the work of moving divers along it. It is described as easily accessible for any qualified diver.
Where it is and how deep
20.2712° S, 57.3646° EPublished position for this site.
The dive
Entry is from a boat and the dive is planned as a drift, so the group goes in together and lets the water move them along the rock rather than swimming a fixed route. Which of the two profiles you get is settled before you splash. Beyond the architecture and the two depth options, nothing is published about the site — no landmark sequence and no species list — so the briefing carries the detail.
Because it is a drift you finish away from where you dropped, so staying with the group and carrying a surface marker matter more than they would on a mooring dive. It is called easily accessible for any qualified diver, which places it as a step up from the shallow reefs nearby rather than a demanding dive; the deeper of the two profiles still bottoms out at 26 metres.
Marine life and season
The sources we used don't single out particular species here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fair | Fair | Good | Prime | Prime | Good | Good | Good | Good | Good | Prime | Good |
Season follows Mauritius: Cyclone season (Jan-Mar) can disrupt trips and cloud visibility; the trade-wind months of Apr-Nov give steadier, clearer conditions.
Know before you go
- This is a drift: you surface well away from where you dropped, so stay with the group and put up an SMB before ascending.
Questions divers ask
How deep is Big Rock?+
It is dived at two levels: a deeper profile with a 26 metre maximum and a shallower one with a 20 metre maximum.
Sources
- Big Rock - Scubago — Scubago
- Big Rock - Wannadive.net — Wannadive.net
More dive sites in Mauritius
Artificial reef
One of Mauritius's best-regarded wrecks, in 25 m
A 44 m fishing boat on sand at 30 m by Coin de Mire
Reef
Shallow coral and a multitude of small reef fish
Cave & cavern
A guided cavern in the reef off Flic en Flac
Reef
A compact reef at about 43 m, minutes from the port
Wreck
A fishing boat sunk for diving at 35 m, a reef since the 1980s
Reef
A small rock outcrop on sand, 16 m at its deepest
Reef
Two pieces of reef split by a sand bank, 17 m deep
Similar dives elsewhere
Two-tier drift: overhangs at 10-15 m for beginners, 25 m for the experienced
A brief, powerful drift where threshers and hammerheads come out of the blue
Mantas swooping past a reef cut with shelter channels
,_Mauricio,_2025-09-24,_DD_30.jpg){kind=link}
A shallow drift with swirling current and elusive hammerheads