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Iron Bottom Sound, Solomon Islands

Solomon Islands

Iron Bottom Sound

So many warships sank here that the sound was renamed for the iron on its floor.

#Water#Solo#Couple#Friends#Culture#Adrenaline#Eco#Unique

Between Guadalcanal, Savo and the Nggela Islands, the sea floor holds ships and aircraft lost during the brutal 1942–43 campaign. The name Iron Bottom Sound comes from that concentration of wreckage, not iron-rich sediment.

Between August 1942 and February 1943 seven major naval battles were fought in this strait, and more than fifty American, Japanese and Australian warships went down in it; the name was coined by the sailors themselves. A 2025 survey documented thirteen of the wrecks in detail. Among the deepest is the USS Juneau, lost with the five Sullivan brothers and found in March 2018 at 4,200 metres. A handful of shallower wrecks are dived with qualified operators, some sites are war graves, and unexploded ordnance is a genuine hazard here.

Terrain map
9.152° S · 159.953° E
Best For

Solo

Shared boats out of Honiara are how single divers reach the accessible sites, and operators are used to matching one diver into a group.

Couple

Only a handful of these wrecks can be dived, so it is a short list done properly rather than a week of them.

Friends

Mixed certification is normal here, and a group lets the operator build days where the deep divers and everyone else still share a boat.

Why This Place
  • More than fifty warships went down here in seven night battles, and thirteen of the wrecks were mapped in fine detail in 2025.
  • The USS Juneau, lost with the five Sullivan brothers aboard, was found on 17 March 2018 at 4,200 metres, far beyond any diver.
  • Many wrecks are too deep or too sensitive to visit, and some are war graves.
  • Dive safety standards vary, and unexploded ordnance is a genuine hazard here.
What to Eat

Back in Honiara, follow a wreck dive with the waterfront lunch stop used in Tourism Solomons’ current itinerary.

On a liveaboard, expect island-bought pumpkin, aubergine, snake beans and greens alongside fish or other protein.

Best Time to Visit
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