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Motosuko Lake

Lake Motosu, located in Japan's Fujikawaguchiko, is a remarkable dive site known for being one of the Fuji Five Lakes. With a staggering depth of 122 meters, it stands as the deepest among its counterparts. Divers at Lake Motosu engage in altitude diving procedures due to its altitude of approximately 900 meters. As the most sought-after freshwater diving spot in Kanto, it offers a captivating underwater adventure for divers of all skill levels.

The underwater realm of Lake Motosu boasts an abundance of captivating marine life. Among the sunken giant trees, divers can often encounter black bass, Magoi, and Nishikigoi forming mesmerizing clusters. Exploring the depth and rocky formations will unveil sightings of fascinating creatures such as catfish, woodpeckers, sailfish, and nuthatches.

Divers have the option to embark on their underwater journey either from the beach or via boat. The dive experience not only affords the opportunity to observe a diverse array of freshwater creatures but also fascinates with the presence of immense submerged trees and even cars.

Enhancing the diving experience, Lake Motosu offers excellent visibility of up to 10 meters, allowing divers to fully immerse themselves in the underwater beauty. With a maximum depth of 15 meters, beginners can comfortably explore this captivating dive site.

Diving Conditions Score for Motosuko Lake

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 Motosuko Lake

Depth

15m

Visibility

10m

Experience Level

beginner

Weather Conditions for Motosuko Lake

Wave Height

1m

Wind Speed

6.9 m/s

Water Temp

18°C

Visibility

25.24km

Cloud Cover

68%

Wave Period

8s

Air Temperature

18.9°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Motosuko Lake
Alpha

Dive Score Chart for Motosuko Lake

Best time to dive: 15:00 with score 6.861233333333333/10. Water conditions: Waves 1m, Wind 6.1 m/s.Best night dive time: 1:00 with score 7.186633333333333/10.

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

Sunrise at Motosuko Lake: 06:00
Sunset at Motosuko Lake: 18:00

Optimal diving conditions at Motosuko Lake 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
1:00

Score: 7.2/10
Waves: 1m (8s), Wind: 3.7 m/s

🌞
Safest Overall
15:00

Score: 6.9/10
Waves: 1m (8s), Wind: 6.1 m/s

🌞
Best Day
15:00

Score: 6.9/10
Waves: 1m, Wind: 6.1 m/s

Seasonal Analysis for Motosuko Lake
Alpha

Historical patterns and best seasons for diving at Motosuko Lake

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 Motosuko Lake

Winter

Avg. Score: 8.6/10

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

Best Months for Motosuko Lake

January
Score: 8.8
December
Score: 8.6
February
Score: 8.4

Ideal Conditions for Motosuko Lake

Water Temp

Thermometer Emoji

21.4°C / 70.5°F

July

Visibility

Telescope Emoji

18.4m / 60.4ft

November

Wave Height

Wave Emoji

0.6m / 2.0ft

November

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Motosuko Lake

Motosuko Lake shows typical northern hemisphere patterns with July being the warmest month (21.4°C) and January the coldest (-3.1°C). The calmest conditions typically occur in November with average wave heights of 0.6m 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.

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

Last updated: 1 min. ago - Jun 20, 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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