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Osezaki

Osezaki: Japan's Premier Dive Site in Suruga Bay

Osezaki is a renowned dive site located in Japan, offering an unforgettable diving experience for both beginners and advanced divers. Situated on a picturesque cape that extends into Suruga Bay, this beach dive destination boasts two distinct options for exploration. Divers can choose between the bayside of the cape or the open seaside dive, both featuring shallow rocky areas upon descent and sandy expanses as you venture further offshore.

Prepare to be amazed by the diversity of marine life that inhabits these waters. Depending on the season, divers can encounter an array of fascinating creatures, ranging from bustling schools of fish and vibrant nudibranchs to elusive gobies and the fascinating anglerfish. If you visit during the spring, keep an eye out for the majestic sunfish, a regular visitor to this site.

For those new to diving, the inner side of the bay provides a tranquil and calm environment, making it an ideal location for beginners' courses. On the other hand, the open sea offers immediate depth, attracting occasional appearances from deep-sea fish. With an abundance of microscopic creatures, Osezaki is a sought-after destination among divers with varied interests.

In terms of logistics, Osezaki is conveniently located near Numazu in the scenic Shizuoka Prefecture of Japan. Its proximity to this vibrant city makes it easily accessible for divers seeking a thrilling underwater adventure. With a maximum depth of 20m and impressive visibility of up to 10m, this dive site promises both safety and incredible sights.

Discover the wonders of Osezaki, Japan's premier dive site in the stunning Suruga Bay. Whether you're a beginner or an experienced diver, immerse yourself in the captivating beauty of this underwater paradise. Plan your visit to Osezaki today and embark on a truly unforgettable diving experience.

Diving Conditions Score for Osezaki

6.1
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 Osezaki

Depth

20m

Visibility

10m

Experience Level

beginner
advanced

Weather Conditions for Osezaki

Wave Height

1.54m

Wind Speed

8.9 m/s

Water Temp

24.8°C

Visibility

2.8km

Cloud Cover

14%

Wave Period

13.15s

Air Temperature

23.5°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Osezaki
Alpha

Dive Score Chart for Osezaki

Best time to dive: 14:00 with score 6.678029133858268/10. Water conditions: Waves 1.46m, Wind 7.9 m/s.Best night dive time: 23:00 with score 6.209086058301647/10.

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

Sunrise at Osezaki: 06:00
Sunset at Osezaki: 18:00

Optimal diving conditions at Osezaki 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
14:00

Score: 6.7/10
Waves: 1.46m (12.7s), Wind: 7.9 m/s

🌙
Best Night
23:00

Score: 6.2/10
Waves: 1.58m, Wind: 6.6 m/s

Seasonal Analysis for Osezaki
Alpha

Historical patterns and best seasons for diving at Osezaki

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 Osezaki

Winter

Avg. Score: 8.3/10

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

Best Months for Osezaki

January
Score: 8.7
December
Score: 8.2
February
Score: 8.1

Ideal Conditions for Osezaki

Water Temp

Thermometer Emoji

25.8°C / 78.4°F

August

Visibility

Telescope Emoji

16.3m / 53.5ft

November

Wave Height

Wave Emoji

0.9m / 3.0ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Osezaki

Osezaki shows typical northern hemisphere patterns with August being the warmest month (25.8°C) and January the coldest (2.1°C). The calmest conditions typically occur in January with average wave heights of 0.9m 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.

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

Last updated: 1 min. ago - Jul 9, 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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