Rio de Janiero Maru
Why dive here
With 195+ marine species recorded in the area - including barracuda, blacktip reef sharks, eagle rays, grey reef sharks and whitetip reef sharks - Rio de Janiero Maru offers some of Chuuk (Truk) Lagoon's richest wreck diving. Water ranges 29-30°C, warmest August, October, November.
The *Rio de Janeiro Maru* is a big one, a passenger cargo ship lying on its starboard side, making for some interesting swim-throughs. Descending onto the hull, you'll find the deck now facing downwards, which can be a little disorienting at first. We always enjoy poking around the cargo holds; they’re pretty open and often filled with ceramic sake bottles or piles of coal, giving you a real sense of its former life. Keep an eye out for the resident reef sharks that cruise past, and the barracuda often hang motionless in the blue. It’s a solid dive, good for those who like to take their time exploring a large wreck without too many tight squeezes.
Typical Rio de Janiero Maru Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Always perform a 3-minute safety stop at 5m before surfacing.
Nearest Dive Centres to Rio de Janiero Maru
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Conditions
Ocean conditions, forecast and tides for Rio de Janiero Maru
Rio de Janiero Maru Ocean Conditions
Monthly averages for Rio de Janiero Maru, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (7.41, 151.84) (2km away)
October Averages
Sea Temperature
30°C
86°F · Range: 29.3–31.4°C
Air Temperature
28°C
82°F
Wind Speed
6.4 m/s
12.4 knots
Atmospheric Pressure
1009.4 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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