Saies Tunnel

Koror, Palau

Depth

40m

Visibility

10m - 30m

Entry

Boat

Experience Level

Advanced

Saies Tunnel

Koror, Palau

Depth

40m

Visibility

10m - 30m

Entry

Boat

Experience Level

Advanced

About Saies Tunnel

The floor of this tunnel was once at sea level during the Ice Age. The dive is one of Palau's more thrilling - to be enjoyed by experienced divers only, and is extremely deep so tunnel time is usually restricted to 12min. The wall projects into the Philippine Sea where, at 50' there's a pointed corner. At 90' you enter the tunnel the goes straight into the wall. Upon entrance there's a window on the left to the sea and the exit directly in front. This is one of windows that open into the chamber. The cavern is well-lit due to these openings. Big-Eye Jacks, snappers and Gray Reef Sharks swim around the opening and inside there's plenty of coral as the light play will reveal. The visibility generally ranges between 45 and 120'. Location: Siaes Corner is perched on the edge of the Marianas Trench the Tunnel itself lies West of Koror, northwest of Ulong Island.

Saies Tunnel Dive Info

Terrain & Features

Drift, Wall

Entry Type

Boat

Max Depth

40m

Visibility Range

10m – 30m

Experience Level

Advanced

Best Gas Mix

21% – 28%

O₂

CNS Load (20 min)

13% at 38m / 29%

O₂

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Marine Life

Bonito
Butterfly Fish
Centropyge Colini
Centropyge Multicolor
Chaetodon Burgess
Dartfish
Eels
Jacks
Pyramid Butterfly Fish
Red Snappers
Spanish Mackerel
Square Spot Anthias
Stingrays
Turtles
White Tip Shark

Weather Conditions

Weather information for Saies Tunnel coming soon.

Dive Operators near Saies Tunnel

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Location

Location details missing.

Dive Site Hazards

Eddy Pull-Off Zones — Eddies behind structures can pull divers away from the main drift line.
Delayed Surface Pickup — Strong current can exceed surface tracking assumptions, delaying boat pickup.
Vertical Current Shear — Currents may vary by depth, causing vertical separation even when divers stay together.

Unstable Visual Ascents — Relying on wall visuals can destabilise ascents.

Gradual Depth Creep — Lack of visual bottom reference can cause unnoticed descent.

Unsignalled Downcurrents — Downcurrents can form without visible indicators.

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