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Mikomoto Island

Discover the diverse and captivating diving spots surrounding Kamikimoto Island, an uninhabited paradise nestled off the coast of Shimoda in Japan. Embark on a short 20-minute boat ride from the harbor to reach this exhilarating dive site. Renowned for its seasonal attraction of hammerhead sharks from summer to autumn, when the powerful Kuroshio Current graces the shores of the Izu Peninsula.

Prepare to be immersed in a mesmerizing underwater world where you can witness an abundance of unique marine life. Encounter the awe-inspiring hammerhead sharks, as well as sandbar sharks and blacktip sharks. The Kuroshio Current effortlessly lures an array of magnificent creatures such as sunfish, sailfish, whale sharks, manta rays, and eagle rays.

Given its offshore location, expect the currents to be robust, guaranteeing thrilling drift dives at every turn. Consequently, it is advised to partake in these adventures with at least an intermediate level of diving experience. Marvel at the mesmerizing sight of hammerhead sharks congregating in colossal schools, famously referred to as "hammer rivers."

With an impressive visibility of 14 meters and a maximum depth of 24 meters, the underwater splendors of Kamikimoto Island await passionate divers with advanced and expert skills. Don't miss the opportunity to explore this extraordinary dive site, located near Mikomotoshima Lighthouse in Shimoda, Shizuoka Prefecture, Japan. Embark on an unforgettable underwater journey that will leave you in awe.

Diving Conditions Score for Mikomoto Island

5.8
Average

Average conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Mikomoto Island

Depth

24m

Visibility

14m

Experience Level

advanced
expert

Weather Conditions for Mikomoto Island

Wave Height

1.54m

Wind Speed

13.8 m/s

Water Temp

24.5°C

Visibility

8.38km

Cloud Cover

78%

Wave Period

6.7s

Air Temperature

21.8°C

Precipitation

0.7 mm

Detailed 7-Day Diving Forecast for Mikomoto Island
Alpha

Dive Score Chart for Mikomoto Island

Best time to dive: 17:00 with score 5.808/10. Water conditions: Waves 1.34m, Wind 11.4 m/s.Best night dive time: 22:00 with score 6.2468/10.

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

Sunrise at Mikomoto Island: 06:00
Sunset at Mikomoto Island: 18:00

Optimal diving conditions at Mikomoto Island 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
22:00

Score: 6.2/10
Waves: 1.12m (6.3s), Wind: 2.2 m/s

🌞
Safest Overall
17:00

Score: 5.8/10
Waves: 1.34m (6.15s), Wind: 11.4 m/s

🌞
Best Day
17:00

Score: 5.8/10
Waves: 1.34m, Wind: 11.4 m/s

Seasonal Analysis for Mikomoto Island
Alpha

Historical patterns and best seasons for diving at Mikomoto Island

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 Mikomoto Island

Winter

Avg. Score: 8.4/10

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

Best Months for Mikomoto Island

January
Score: 8.5
December
Score: 8.4
February
Score: 8.3

Ideal Conditions for Mikomoto Island

Water Temp

Thermometer Emoji

26.2°C / 79.2°F

August

Visibility

Telescope Emoji

11.9m / 39.0ft

June

Wave Height

Wave Emoji

3.5m / 11.5ft

May

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Mikomoto Island

Mikomoto Island shows typical northern hemisphere patterns with August being the warmest month (26.2°C) and January the coldest (6.0°C). The calmest conditions typically occur in May with average wave heights of 3.5m and wave periods of 8.0s. The most comfortable wave conditions are in May 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 0.1mm of precipitation. For beginners, the best time to visit would be during May to July, 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.

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