Tuna wreck

Best months: Jan–May

Protected Area

Mu Ko Similan

Why dive here

With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Tuna wreck offers some of Similan Islands's richest wreck diving. Water ranges 29-31°C, warmest April, May, June.

Best timeJan–May

WetsuitA 3mm shorty or thin full wetsuit

Marine lifeBlacktip Reef Sharks, Eagle Rays, Giant Moray Eels, Whale Sharks and Clownfish · 173+ species recorded

Water29-31°C · warmest April, May, June

CharacterWreck dive

StandoutExceptional marine biodiversity

The Tuna wreck, off Ko Bon, isn’t actually a tuna boat at all. It’s a fishing trawler, sunk intentionally as an artificial reef back in 2000, and we’ve spent many a no-decompression limit exploring its nooks. She sits upright on a sandy bottom at about 30 metres, offering a decent penetration for those with the right training. We love dropping down to the wheelhouse first, watching the resident lionfish glide through the windows, their venomous spines fanning out. Currents here can pick up, so we always check the tide charts. Dive it on a slack tide, and you’ll have time to really appreciate the details – the huge moray eels that peer out from the engine room, the schools of yellow snapper that shimmer like a living curtain across the deck. Our favourite spot is the stern, where a massive school of fusiliers often hangs, so thick they almost block the light. It’s a proper wreck dive, moody and teeming with life, a great spot for experienced divers looking for something beyond the coral bommies of the Similans.

Safety Notes

Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

Today06:1818:1611h 58m daylightGolden hour 17:48

Reviews for Tuna wreck

Conditions

Ocean conditions, forecast and tides for Tuna wreck

Tuna wreck Ocean Conditions

Monthly averages for Tuna wreck, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (8.1, 98.3) (6km away)