

Henrietta Rocks offers beginner divers and snorkellers an accessible shore entry into Rottnest Island's marine world. The site sits in shallow waters between 2 to 10 metres, where scattered reef patches and seagrass beds create varied habitats close to shore. You'll find the remnants of a small wreck adding structure to the sandy bottom, though visibility can change throughout the day depending on conditions. The shallow depth means you can take your time exploring without worrying about air consumption. Watch for Western Scalyfin darting between the rocks, while Blackspot Goatfish probe the sand for food. Millers Damsel and Western Gobbleguts frequent the reef patches. You might spot stingrays gliding over the seagrass or sea turtles passing through. Dolphins occasionally visit the area. The variable current keeps things interesting without becoming overwhelming for newer divers. Be aware that surf conditions can affect entry and exit, and you'll need to mind the sharp coral when navigating the reef. Jellyfish appear seasonally. The combination of easy depths, shore access, and diverse marine life makes this an ideal spot to build confidence while experiencing Western Australia's underwater diversity. Best visited during the warmer months from October through April.
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October through April offers the most reliable conditions for this site. Enter slowly and check for surf before committing, as shore entry can be awkward on rougher days.
The site is accessible from shore. It can be reached via the Quokka Coaches Island Explorer bus (Stop 3), which is about a 10-minute ride from the main settlement. It is also accessible by bicycle (approx. 8 minutes) or on foot (approx. 30 minutes) from the settlement. Stairs lead down to the beach from the road.
Blue bottle jellyfish can be present in the area. The limestone reef can be sharp. On the island itself, venomous dugite snakes are present. The coastal cliffs and overhangs can be unstable and should be avoided.
Depth
2-10m
Visibility
5-15m
Skill Level
Beginner
Entry
Shore
Water Temp
26-29°C
Current
Mild
Typical Dive
45 min
Best Time
Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
Henrietta Rocks is accessed via shore entry on Rottnest Island, Western Australia, located near Perth Metro. No boat is required as snorkellers can walk directly into the water from the beach. The site features depths ranging from 2 to 10 metres, making shore access straightforward for all experience levels.
Henrietta Rocks is classified as a beginner-level snorkelling site with shallow depths starting at just 2 metres. The gradual depth progression to 10 metres and shore entry make it accessible for novice snorkellers. No certifications are required to explore this Western Australia location.
Henrietta Rocks hosts diverse marine life including sea turtles, dolphins, stingrays, Blackspot Goatfish, and Millers Damsel. Western Australian species such as Western Scalyfin and Western Gobbleguts are commonly observed. The shallow reef between 2 and 10 metres provides excellent habitat for these species year-round.
Water temperatures at Henrietta Rocks range from 17°C in winter months to 23°C during summer. The warmest conditions occur between October and April, which also represents the best time to visit. Snorkellers may want a 3mm wetsuit during cooler months and can manage with a shortie or rashguard in summer.
The optimal months for snorkelling Henrietta Rocks are October through April, covering spring through autumn in Western Australia. During this period, water temperatures reach 20-23°C and conditions are generally calmer. The site remains accessible year-round but summer months offer the most comfortable snorkelling experience.
Snorkellers at Henrietta Rocks should be aware of surf conditions, sharp coral, jellyfish, and potential marine life interactions. The shore entry can be affected by wave action, so check conditions before entering. Protective footwear helps prevent coral cuts, and care should be taken not to disturb sea turtles and stingrays.
Henrietta Rocks has no entry fee for snorkelling, though general Rottnest Island access fees apply for ferry transport from Perth Metro. The site offers no on-site facilities, so snorkellers should bring all necessary equipment and supplies. This makes it a budget-friendly option once you reach Rottnest Island.
Night snorkelling is permitted at Henrietta Rocks, offering opportunities to observe nocturnal marine behaviour in Western Australia waters. The shallow depths of 2-10 metres and shore entry make night sessions manageable for experienced snorkellers. Proper torch equipment and buddy systems are essential for safe night snorkelling.
Diving at Henrietta Rocks in Perth Metro requires the following certifications: Open Water. Always dive within your training limits.
A 3mm wetsuit is recommended for diving at Henrietta Rocks in Perth Metro. Water temperatures range from 26°C to 29°C.