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SMS Cormoran Wreck

Guam, United States
AOW suggested24–40 m (80–130 ft) depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

SMS Cormoran Wreck at a glance

SMS Cormoran Wreck is an advanced boat dive site in Guam, United States with depths of 24.4–39.6 m (80–130 ft). Typically most favorable Jun · from 3 years of archive data. Divers commonly see Whip coral gobies/blennies, Soft coral, and Nudibranch. Recent reports put the water around 29°C (83°F). Check the latest conditions and entry details before you go.

Next window today· 7:00–18:00 · favorable & moderate · sunset 17:56

Forecast for this hour · 3:00 · run 11 h ago
1.2 m (4.0 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 in the harbor, entanglement/sharp metal, overhead/penetration hazards, and possible decompression/gas-planning pressure if combining both wrecks.

Read the full hazards ↓

Dive windows this week

Mon7:00–10:00 favorable, 10:00–13:00 moderate, 13:00–15:00 favorable, 15:00–18:00 moderate

1.2 m waves · 11 kn wind (3.8 ft waves · 11 kn wind)

Tue7:00–18:00 favorable

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

Wed7:00–18:00 favorable

0.9 m waves · 5 kn wind (3.0 ft waves · 5 kn wind)

Thu7:00–9:00 favorable, 9:00–18:00 moderate

1.0 m waves · 10 kn wind (3.2 ft waves · 10 kn wind)

Fri7:00–10:00 favorable, 10:00–16:00 moderate, 16:00–18:00 favorable

1.3 m waves · 6 kn wind (4.4 ft waves · 6 kn wind)

Sat7:00–8:00 favorable, 8:00–18:00 moderate

2.0 m waves · 7 kn wind (6.6 ft waves · 7 kn wind)

SunNot 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 6:13 · Sunset 17:56 · some windows run past sunset

Source: Open-Meteo marine · model point 11 km from site · updated 25 Oct, 15:26 GMT+10

Forecast only — always assess conditions on site.

Compare this weekend’s windows near SMS Cormoran 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: Whip coral gobies/blennies, Nudibranch, tropical reef fish
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 seen at this site

Species noted at this site — 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.

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

Historic German SMS Cormoran wreck in Apra Harbor, lying beside/under the Tokai Maru wreck pair. It is a deep boat wreck for experienced divers, with unusual WWI/WWII side-by-side context and possible wreck-penetration options only for properly trained divers using a line.

boatwreck

Deep wreck profile, reduced visibility, harbor traffic, tide/current in the harbor, entanglement/sharp metal, overhead/penetration hazards, and possible decompression/gas-planning pressure if combining both wrecks.

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