INDO-PACIFIC
Siau Island · Karangetang
- Indonesia
- Advanced
- April - November
Plan your dive
- Experience level
- Advanced
- Depth guide
- Reef and blue 20-40 m
- When to go
- April - November
- Site type
- Pelagic Strait
Featured wildlife
- Scalloped hammerhead
- Whitetip reef shark
- Giant trevally
- Green turtle
About this dive site
North Sulawesi volcano island with hammerhead and pelagic potential.
Siau Island near Karangetang volcano sits on expeditions from Manado or Sangihe routes with steep walls and seasonal hammerhead or pelagic sightings. Not a daily resort dive — plan dedicated liveaboard or charter days.
Siau is expedition diving near an active volcano; hammerheads are seasonal, not daily.