Elephant Head Rock

Elephant Head Rock — known in Thai as Hin Pousar — is widely described as the most famous dive site in the Similan Islands, located south of Similan Island 8, Similan Islands National Park, Phang Nga Province, Thailand.

Overview

The site’s name comes from three above-water granite rocks, the largest of which resembles an elephant’s head in profile. Below the surface, giant granite boulders form a complex labyrinth of swim-throughs, tunnels, and gorges (similandivingtours.com, dive-the-world.com, sunrise-divers.com) extending beyond 40 meters, though most operators note the majority of the interesting topography sits above 30 meters. It is consistently rated as a challenging, advanced-level dive due to its complexity and the currents that can build between the boulder formations.

Site Information

• Location: South of Similan Island 8, Similan Islands National Park, Phang Nga Province, Thailand
• Entry Type: liveaboard
• Site Type: Pinnacle/seamount
• Difficulty Level: Advanced
• Maximum Depth: 40 meters
• Typical Visibility: 15–35 meters
• Current: Moderate to strong; accelerates through channels
• Best Time: November to May

Marine Life

Sources report whitetip reef sharks, leopard sharks, turtles, giant trevally, and cuttlefish at this site (dive-the-world.com), along with honeycomb moray eels and various angelfish and butterflyfish species (similandivingtours.com). Napoleon wrasse are commonly reported at other nearby Similan sites but were not specifically corroborated for Elephant Head Rock in the sources consulted this pass, so that claim has been removed rather than carried forward.

Dive Profile

Most dive plans circumnavigate the main boulder complex, moving through swim-throughs and channels at varying depths. Guides typically lead groups single-file through the narrower passages, briefing the route before descent given the site’s maze-like layout.

Entry and Exit

Liveaboard access for most dives; a small number of day-trip boats reach this site given its relatively southerly position in the archipelago. Entry by zodiac with giant stride.

Tips and Recommendations

• Stay close to your guide, especially on a first visit — the boulder maze is genuinely disorienting without prior familiarity
• Move slowly through swim-throughs to avoid silt disturbance and to give yourself a chance to spot smaller crevice-dwelling life
• Leopard sharks are reported resting in specific sandy areas between boulders — your guide will know the likely spots on a given day

Safety Considerations

Disorientation in the boulder complex is the primary risk for less experienced divers, and current can accelerate unpredictably through the channels. Maintain visual contact with your guide, never enter a swim-through without a visible exit, and confirm your buddy is following. Advanced certification with strong buoyancy control is the standard recommendation.

Photography

The interplay of light through the boulder channels and swim-through entrances creates strong silhouette opportunities. A wide-angle lens captures the scale of the formations relative to divers; a slower, low approach works best for leopard shark portraits.

Sources: Similan Diving Tours, Dive The World, Sunrise Divers. Last updated 2026-07-05.