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Tokai Maru Wreck

Guam, United States
AOW suggestedDeep wreck profile, reduced visibility, harbor traffic, tide/current, entanglement/sharp metal, overhead/penetration hazards, and unexploded ordnance/depth-charge risk reported on/near wreck structures12–37 m (40–120 ft) depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Tokai Maru Wreck at a glance

Tokai Maru Wreck is an advanced boat dive site in Guam, United States with depths of 12.2–36.6 m (40–120 ft). Typically most favorable Jun · from 3 years of archive data. Divers commonly see Sponges, tropical reef fish, and Moray eel. Recent reports put the water around 29°C (83°F). Check the latest conditions and entry details before you go.

Favorable window now· until 11:00, then favorable & moderate until 18:00 · sunset 17:56

Forecast for this hour · 9:00 · run 18 h ago
1.1 m (3.7 ft)waves — about a meter expected (waves — about four feet expected)

Tap a factor for its source and model point · Forecast 29°C · seasonal avg 30°C ( · Forecast 83°F · seasonal avg 86°F)

Site hazards: Deep wreck profile, reduced visibility, harbor traffic, tide/current, entanglement/sharp metal, overhead/penetration hazards, and unexploded ordnance/depth-charge risk reported on/near wreck structures

Read the full hazards ↓

Dive windows this week

Smallest waves: Wed
Tue7:00–11:00 favorable, 11:00–12:00 moderate, 12:00–18:00 favorable

1.1 m waves · 5 kn wind (3.6 ft waves · 5 kn wind)

Wed7:00–18:00 favorable

0.9 m waves · 2 kn wind (3.0 ft waves · 2 kn wind)

Thu7:00–10:00 favorable, 10:00–18:00 moderate

1.0 m waves · 9 kn wind (3.1 ft waves · 9 kn wind)

Fri7:00–18:00 moderate

1.6 m waves · 10 kn wind (5.3 ft waves · 10 kn wind)

Sat7:00–10:00 moderate, 15:00–18:00 moderate

2.4 m waves · 9 kn wind (7.8 ft waves · 9 kn wind)

Sun7:00–18:00 moderate

2.0 m waves · 2 kn wind (6.4 ft waves · 2 kn wind)

MonNot in the forecast yet

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 5:52 · Sunrise 6:14 · Sunset 17:56 · some windows run past sunset

Source: Open-Meteo marine · model point 11 km from site · updated 26 Oct, 15:27 GMT+10

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Tokai Maru Wreck

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Known for: tropical reef fish, Nudibranch, Whip corals with whip gobies/blennies
Best time: Dive with a local operator during favorable tide/current and harbor-traffic conditions.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 11% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 2.2 m (7.3 ft), wind has typically been 19 knots
  2. February, 1% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 2.2 m (7.3 ft), wind has typically been 20 knots
  3. March, 32% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 1.9 m (6.1 ft), wind has typically been 17 knots
  4. April, 54% of days have historically been favorable, water has typically been 29°C (83°F), waves have typically been 1.5 m (4.9 ft), wind has typically been 16 knots
  5. May, 73% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 16 knots
  6. June, 87% of days have historically been favorable, water has typically been 30°C (85°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 14 knots, historically most favorable
  7. July, 78% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 15 knots
  8. August, 71% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 13 knots
  9. September, 73% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.4 m (4.5 ft), wind has typically been 15 knots
  10. October, 55% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.6 m (5.2 ft), wind has typically been 15 knots
  11. November, 22% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.8 m (5.8 ft), wind has typically been 18 knots
  12. December, 10% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 2.0 m (6.5 ft), wind has typically been 18 knots

June has typically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life recorded at this site, by month

Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

  • Broadbared Lionfish recorded here May (1 record)

    Pterois antennatamost recent 2014

  • Pennant Coral Fish recorded here May (1 record)

    Heniochus acuminatusmost recent 2014

  • Scissortail Sergeant recorded here May (1 record)

    Abudefduf sexfasciatusmost recent 2014

  • Threadfin Butterflyfish recorded here May (1 record)

    Chaetodon aurigamost recent 2014

  • Titan Triggerfish recorded here May (1 record)

    Balistoides viridescensmost recent 2014

Newest record here: 2014. Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.

The underwater calendar

When these animals are most recorded around Micronesia & western Pacific — from open sighting data, not a promise.

Watch the whole year animate on the Migrations map

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Data updated July 2026

Site details

Large Japanese passenger-cargo ship wreck in Apra Harbor, lying beside the SMS Cormoran. The wreck offers a shallow bridge/superstructure zone with deeper hull/cargo areas, but full exploration and penetration require advanced wreck planning and may push divers toward technical gas/decompression choices.

boatwreck

Deep wreck profile, reduced visibility, harbor traffic, tide/current, entanglement/sharp metal, overhead/penetration hazards, and unexploded ordnance/depth-charge risk reported on/near wreck structures — do not touch artifacts.

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