Shark Fin
Located near the Rankoshi Ocean Road in Japan, this dive site offers easy access with stairs and convenient facilities such as parking and toilets nearby. As a rocky beach, it is advisable to wear suitable footwear for walking. Ideal for divers of all levels, including beginners, advanced, and expert, it is also suited for freediving enthusiasts.
Exploring this dive site will reveal a diverse marine ecosystem, with numerous caves and stones harboring various species of snails and octopuses. Dive into the captivating underwater caves for a thrilling experience. This underwater paradise is adorned with vibrant seaweed, other aquatic plants, and teeming with small fish, creating a beautiful underwater garden.
With a maximum depth of 17m and visibility reaching up to 10m, this site offers good diving conditions. Its close proximity to National Highway Route 229 and Iwanai City ensures easy access. Come dive in this stunning location in Hokkaido Prefecture, Japan, where nature's wonders await.
Exploring this dive site will reveal a diverse marine ecosystem, with numerous caves and stones harboring various species of snails and octopuses. Dive into the captivating underwater caves for a thrilling experience. This underwater paradise is adorned with vibrant seaweed, other aquatic plants, and teeming with small fish, creating a beautiful underwater garden.
With a maximum depth of 17m and visibility reaching up to 10m, this site offers good diving conditions. Its close proximity to National Highway Route 229 and Iwanai City ensures easy access. Come dive in this stunning location in Hokkaido Prefecture, Japan, where nature's wonders await.
Diving Conditions Score for Shark Fin
6.2
Above AverageDecent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Shark Fin
Depth
17m
Visibility
10m
Experience Level
beginner
advanced
expert
Weather Conditions for Shark Fin
Wave Height
0.1m
Wind Speed
0.6 m/s
Water Temp
17.1°C
Visibility
3.34km
Cloud Cover
29%
Wave Period
4.95s
Air Temperature
15.6°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Shark Fin
Alpha
Dive Score Chart for Shark Fin
Best time to dive: 17:00 with score 8.239653198653198/10. Water conditions: Waves 0.1m, Wind 0.4 m/s.Best night dive time: 19:00 with score 7.9911111111111115/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Shark Fin: 06:00
Sunset at Shark Fin: 18:00
Optimal diving conditions at Shark Fin 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
17:00Score: 8.2/10
Waves: 0.1m (4.95s), Wind: 0.4 m/s
Best Night
19:00Score: 8.0/10
Waves: 0.1m, Wind: 2.6 m/s
Seasonal Analysis for Shark FinAlpha
Historical patterns and best seasons for diving at Shark Fin
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 Shark Fin
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 Shark Fin
January
Score: 8.6
February
Score: 8.2
December
Score: 8.0
Ideal Conditions for Shark Fin
Water Temp
21.5°C / 70.7°F
July
Visibility
13.8m / 45.3ft
October
Wave Height
0.8m / 2.6ft
January
Wave Period
8.0s
January
Seasonal Insights for Shark Fin
Shark Fin shows typical northern hemisphere patterns with July being the warmest month (21.5°C) and January the coldest (-6.4°C). The calmest conditions typically occur in January with average wave heights of 0.8m 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). April is usually the driest month with 0.1mm 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 16, 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.
4 Dive sites near Shark Fin in
Got feedback?
Help us improve this dive site by giving us feedback.