Hasama Ocean Park
Immerse yourself in a vibrant underwater world brimming with life. Be captivated by the kaleidoscope of colorful fish dancing among bustling soft corals. Keep an eye out for fascinating creatures like lobsters, nudibranchs, and captivating frogfish. The underwater shrine not only provides a visual treat but also holds historical significance as an integral part of a genuine above-water shrine. Nearby, an extraordinary underwater air dome awaits, offering a unique opportunity to resurface beneath the waves.
For the more adventurous divers, Hasama Ocean Park offers vast cave systems near the harbor, thriving with an array of fascinating marine species. During the summer months, lucky visitors may even catch a glimpse of the magnificent sunfish (mola mola) and, on rare occasions, even the majestic whale sharks.
With excellent visibility reaching up to 10 meters and a maximum depth of 14 meters, Hasama Ocean Park is an ideal diving destination for divers of all levels, from beginners to advanced. Explore the wonders beneath the surface and discover the secrets this underwater paradise has to offer.
Plan your next diving adventure at Hasama Ocean Park in Hasama, Tateyama, Chiba Prefecture, Japan.
Diving Conditions Score for Hasama Ocean Park
Good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Hasama Ocean Park
Depth
14m
Visibility
10m
Experience Level
Weather Conditions for Hasama Ocean Park
Wave Height
0.92m
Wind Speed
6.5 m/s
Water Temp
23.4°C
Visibility
6.62km
Cloud Cover
64%
Wave Period
7.25s
Air Temperature
23.6°C
Precipitation
0 mm
Dive Score Chart for Hasama Ocean Park
Best time to dive: 6:00 with score 7.589213793103449/10. Water conditions: Waves 0.9m, Wind 6.2 m/s.Best night dive time: 19:00 with score 6.94438559670782/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Hasama Ocean Park 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.
Score: 7.6/10
Waves: 0.9m (7.25s), Wind: 6.2 m/s
Score: 7.5/10
Waves: 0.82m (7.45s), Wind: 6 m/s
Score: 6.9/10
Waves: 0.76m, Wind: 7.9 m/s
Seasonal Analysis for Hasama Ocean ParkAlpha
Historical patterns and best seasons for diving at Hasama Ocean Park
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 Hasama Ocean Park
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Hasama Ocean Park
Ideal Conditions for Hasama Ocean Park
Water Temp
25.6°C / 78.1°F
August
Visibility
12.0m / 39.4ft
October
Wave Height
2.0m / 6.6ft
November
Wave Period
8.0s
January
Seasonal Insights for Hasama Ocean Park
Hasama Ocean Park shows typical northern hemisphere patterns with August being the warmest month (25.6°C) and January the coldest (3.3°C). The calmest conditions typically occur in November with average wave heights of 2.0m and wave periods of 8.0s. The most comfortable wave conditions are in November 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 November to January, 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 19, 2026