Skip to content
Go to Dive Champ home pageDive Champ LogoDive Champ

Tokai Maru, wreck

The Tokai Maru, a significant dive site in Apra Harbor, Guam, holds historical significance as the only location where divers can explore wrecks from both World Wars in one place. Sunk by the U.S. submarine, Snapper, on August 27th, 1943, this remarkable wreck rests at a depth of 130' in the clear waters. Alongside the scuttled Coromoran from WWI, this unique site captivates divers from around the world.

Whip corals adorn the Tokai Maru, providing a sanctuary for tiny whip blennies. This stunning wreck is also home to a diverse marine life including eels, turtles, and impressive map pufferfish. Exquisite nudibranchs add vibrant colors to your underwater journey.

Diving the Tokai Maru requires advanced certification due to its depth, reaching a maximum of 30m. Those wishing to penetrate the wrecks must possess the proper certification, experience, and equipment. Don't forget to monitor your depth, time, and air consumption while exploring this site. Safety is paramount, so it's crucial to remain within your limits.

The SMS Cormoran, another wreck, lies alongside the Tokai Maru at a depth of approximately 95' off the starboard side. Divers can appreciate the rich history and beauty of these sunken vessels in one breathtaking dive.

Located in Apra Harbor, Guam, this dive site promises remarkable visibility of around 11m. Divers of advanced and expert levels will delight in the unparalleled experience offered by this remarkable location. Don't miss the opportunity to explore this exceptional dive site, delving into the depths of both World Wars.

Diving Conditions Score for Tokai Maru, wreck

6.3
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Tokai Maru, wreck

Depth

30m

Visibility

11m

Experience Level

advanced
expert

Weather Conditions for Tokai Maru, wreck

Wave Height

0.8m

Wind Speed

13.8 m/s

Water Temp

29.9°C

Visibility

7.42km

Cloud Cover

95%

Wave Period

6.45s

Air Temperature

29.3°C

Precipitation

0.5 mm

Detailed 7-Day Diving Forecast for Tokai Maru, wreck
Alpha

Dive Score Chart for Tokai Maru, wreck

Best time to dive: 15:00 with score 7.974660784313725/10. Water conditions: Waves 0.78m, Wind 4.1 m/s.Best night dive time: 19:00 with score 6.960710144927536/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at Tokai Maru, wreck: 06:00
Sunset at Tokai Maru, wreck: 18:00

Optimal diving conditions at Tokai Maru, wreck are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.

🌞
Best Overall
15:00

Score: 8.0/10
Waves: 0.78m (6.8s), Wind: 4.1 m/s

🌙
Best Night
19:00

Score: 7.0/10
Waves: 0.78m, Wind: 4.8 m/s

Seasonal Analysis for Tokai Maru, wreck
Alpha

Historical patterns and best seasons for diving at Tokai Maru, wreck

The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.

Monthly Dive Score Analysis - Seasonal Diving Conditions

Higher values indicate better diving conditions

Seasonal DiveScore Chart

This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.

Higher values indicate better diving conditions

Best Season for Tokai Maru, wreck

Winter

Avg. Score: 9.4/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for Tokai Maru, wreck

January
Score: 9.5
February
Score: 9.4
November
Score: 9.4

Ideal Conditions for Tokai Maru, wreck

Water Temp

Thermometer Emoji

27.6°C / 81.7°F

May

Visibility

Telescope Emoji

11.2m / 36.7ft

November

Wave Height

Wave Emoji

1.4m / 4.6ft

September

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Tokai Maru, wreck

Tokai Maru, wreck shows typical northern hemisphere patterns with May being the warmest month (27.6°C) and January the coldest (22.7°C). The calmest conditions typically occur in September with average wave heights of 1.4m and wave periods of 8.0s. The most comfortable wave conditions are in September with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). February is usually the driest month with 1.0mm of precipitation. For beginners, the best time to visit would be during September to November, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jun 18, 2026

Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.

50 Dive sites near Tokai Maru, wreck in

Find more dive sites in United States

United StatesUnited States

United States

Got feedback?

Help us improve this dive site by giving us feedback.