Palau · Palau · Cave & cavern · Wall
Siaes Tunnel
A swim-through in a vertical wall, open at both ends
Photo: LuxTonnerre · CC BY 2.0
Siaes Tunnel is a natural swim-through cut into a vertical wall, open at both ends and about 90 m long. The water inside is calm, which leaves time to study the species living on the tunnel walls, and its depth makes it a dive for more experienced divers.
Where it is and how deep
7.2930° N, 134.2700° EApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.
The dive
The dive begins with a straight drop down the vertical wall until the tunnel opening appears at about 30 m (100 ft). Inside, the floor reaches 40 m (120 ft) at its deepest point, and divers pass through to leave by the exit at 25 m (82 ft).
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Prime | Prime | Prime | Prime | Good | Fair | Fair | Fair | Fair | Fair | Good | Prime |
Season follows Palau: Boats run every month; November to April has the best conditions, and June to December is typhoon season.
Photos from Siaes Tunnel
lakshmioct01 · CC BY 2.0
amanderson2 · CC BY 2.0
Dive videos
Siaes Tunnel, Palau · Wreck Respect on YouTube
Questions divers ask
What experience does Siaes Tunnel call for?+
It is best suited to more experienced divers: the entrance is at 30 m, the exit at 25 m and the tunnel floor at 40 m, all inside a swim-through.
Sources
- Siaes Tunnel — Fish 'n Fins Palau
- Scuba diving in Palau — Wild Hearted
- Diving in Palau — Dive The World
Photo credits
- Three divers silhouetted against bright blue water at the opening of a dark underwater tunnel. by LuxTonnerre, CC BY 2.0, via Wikimedia Commons
- One diver swimming out into open blue water beneath a large dark sea fan on an overhang. by lakshmioct01, CC BY 2.0, via Openverse
- A large dark sea fan hanging from a rock ceiling against pale blue water. by amanderson2, CC BY 2.0, via Openverse
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