Susami
Susami, located in the Kansai area of Japan, is a popular diving destination for divers in the region. With a convenient two-hour journey from Kansai, it serves as a fantastic home base for many underwater enthusiasts. While beach entry is an option, boat diving is the main attraction at this site.
What sets Susami apart is its remarkable clarity known as "Susami Blue" and its diverse marine life, including abundant nudibranchs and various macroscopic creatures such as anchovy, black-eyed clams, spotted gobies, and groupers. Witnessing the awe-inspiring spectacle of schools of red clams, puffins, 100 dwarf dallions, and 500 to 1,000 sablefish is an absolute delight for divers.
Exploring the depths of Susami also offers unique experiences, such as the underwater mailbox located at Beach Point. This impressive feat has earned it a spot in the Guinness Book of World Records as "the deepest place in the world." Divers can even send postcards from the Susami Post Office, which will be delivered overseas.
Safety is of utmost importance in Susami, with fixed buoys strategically placed at each point to ensure the well-being of divers. These buoys also contribute to the preservation of the underwater environment. Additionally, a safety bar is conveniently provided at a depth of 5 meters, making it easy for divers to gauge the depth of their safety stops. With several beginner-friendly diving spots, Susami welcomes divers of all skill levels.
Plan your diving adventure in Susami, Japan, and immerse yourself in its breathtaking underwater world. The crystal-clear visibility of 9m and a maximum depth of 14m make it an ideal destination for unforgettable diving experiences.
Location: Susami, Nishimuro County, Wakayama Prefecture, 649-2621, Japan.
What sets Susami apart is its remarkable clarity known as "Susami Blue" and its diverse marine life, including abundant nudibranchs and various macroscopic creatures such as anchovy, black-eyed clams, spotted gobies, and groupers. Witnessing the awe-inspiring spectacle of schools of red clams, puffins, 100 dwarf dallions, and 500 to 1,000 sablefish is an absolute delight for divers.
Exploring the depths of Susami also offers unique experiences, such as the underwater mailbox located at Beach Point. This impressive feat has earned it a spot in the Guinness Book of World Records as "the deepest place in the world." Divers can even send postcards from the Susami Post Office, which will be delivered overseas.
Safety is of utmost importance in Susami, with fixed buoys strategically placed at each point to ensure the well-being of divers. These buoys also contribute to the preservation of the underwater environment. Additionally, a safety bar is conveniently provided at a depth of 5 meters, making it easy for divers to gauge the depth of their safety stops. With several beginner-friendly diving spots, Susami welcomes divers of all skill levels.
Plan your diving adventure in Susami, Japan, and immerse yourself in its breathtaking underwater world. The crystal-clear visibility of 9m and a maximum depth of 14m make it an ideal destination for unforgettable diving experiences.
Location: Susami, Nishimuro County, Wakayama Prefecture, 649-2621, Japan.
Diving Conditions Score for Susami
6
Above AverageDecent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Susami
Depth
14m
Visibility
9m
Experience Level
beginner
Weather Conditions for Susami
Wave Height
1.52m
Wind Speed
17.2 m/s
Water Temp
24.5°C
Visibility
6.46km
Cloud Cover
73%
Wave Period
5.7s
Air Temperature
22.9°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Susami
Alpha
Dive Score Chart for Susami
Best time to dive: 9:00 with score 5.6831/10. Water conditions: Waves 1.58m, Wind 17.7 m/s.Best night dive time: 23:00 with score 5.199700000000001/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Susami: 06:00
Sunset at Susami: 18:00
Optimal diving conditions at Susami 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
9:00Score: 5.7/10
Waves: 1.58m (6.35s), Wind: 17.7 m/s
Best Night
23:00Score: 5.2/10
Waves: 1.54m, Wind: 17.7 m/s
Seasonal Analysis for SusamiAlpha
Historical patterns and best seasons for diving at Susami
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 Susami
Winter
Avg. Score: 10.0/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Susami
January
Score: 10.0
February
Score: 10.0
March
Score: 10.0
Ideal Conditions for Susami
Water Temp
23.4°C / 74.1°F
June
Visibility
20.1m / 65.9ft
October
Wave Height
0.2m / 0.7ft
January
Wave Period
8.0s
January
Seasonal Insights for Susami
Susami shows typical northern hemisphere patterns with June being the warmest month (23.4°C) and December the coldest (19.4°C). The calmest conditions typically occur in January with average wave heights of 0.2m and wave periods of 8.0s. The most comfortable wave conditions are in January 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). January is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during January to March, 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.
Last updated: 1 min. ago - Jun 21, 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.
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