Western Rocky Island

Good diving all year

Why dive here

With 164+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Western Rocky Island offers some of Mergui Archipelago's richest diving. Water ranges 28-31°C, warmest April, May, June.

Best timeYear-round

WetsuitA 3mm shorty or thin full wetsuit

Marine lifeBlacktip Reef Sharks, Eagle Rays, Giant Moray Eels, Whale Sharks and Clownfish · 164+ species recorded

Water28-31°C · warmest April, May, June

Charactermax 20-25m

StandoutExceptional marine biodiversity

Western Rocky Island sits a little north of the Surin Islands, an outpost for what feels like bigger things. The real draw here is a 30-meter tunnel, dropping to about 25 meters, which often has a few nurse sharks napping inside. Outside the tunnel, the walls offer solid diving, with some decent spots to drift and keep an eye out for larger pelagics passing by. It’s a good spot if you’re looking for a slightly different experience than the usual reef dives, especially if you enjoy exploring a natural tunnel.

Typical Western Rocky Island Dive Profile

Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

Safety Notes

Depth of 20m - Advanced Open Water certification recommended.

Always perform a 3-minute safety stop at 5m before surfacing.

Today06:1818:1511h 58m daylightGolden hour 17:47

Reviews for Western Rocky Island

Conditions

Ocean conditions, forecast and tides for Western Rocky Island

Western Rocky Island Ocean Conditions

Monthly averages for Western Rocky Island, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (9.78, 97.85) (1km away)