Jogashima
Jogashima: A Popular Dive Site near Tokyo Bay and Sagami Bay in Japan
Jogashima, situated at the southernmost point of the Miura Peninsula in Kanagawa Prefecture, Japan, is a must-visit dive site for both beginner and advanced divers. Accessible via a bridge, this location has gained popularity for day trips from the Tokyo area.
During the spring, divers can marvel at over 30 species of nudibranchs in just one dive. This underwater paradise also offers sightings of fascinating macro-organisms such as dangling fish, seahorses, snails, cuttlefish, and moss damselfish. Additionally, large schools of black marlin and lobster fish can be observed in these waters.
The abundant marine life includes rare macro species like nudibranchs, dandelions, and snub-nosed clownfish. Explorers can also experience the thrill of dynamic terrain points that encompass significant crevasses and drop-offs, which extend for more than a dozen meters.
With a visibility of 7 meters and a maximum depth of 11 meters, Jogashima guarantees excellent underwater experiences for divers of all levels. So, pack your gear and head to Misaki 5-chome, Miura, Kanagawa Prefecture, 238-0298, Japan, to uncover the wonders that await you in these extraordinary dive sites near Tokyo Bay and Sagami Bay.
Jogashima, situated at the southernmost point of the Miura Peninsula in Kanagawa Prefecture, Japan, is a must-visit dive site for both beginner and advanced divers. Accessible via a bridge, this location has gained popularity for day trips from the Tokyo area.
During the spring, divers can marvel at over 30 species of nudibranchs in just one dive. This underwater paradise also offers sightings of fascinating macro-organisms such as dangling fish, seahorses, snails, cuttlefish, and moss damselfish. Additionally, large schools of black marlin and lobster fish can be observed in these waters.
The abundant marine life includes rare macro species like nudibranchs, dandelions, and snub-nosed clownfish. Explorers can also experience the thrill of dynamic terrain points that encompass significant crevasses and drop-offs, which extend for more than a dozen meters.
With a visibility of 7 meters and a maximum depth of 11 meters, Jogashima guarantees excellent underwater experiences for divers of all levels. So, pack your gear and head to Misaki 5-chome, Miura, Kanagawa Prefecture, 238-0298, Japan, to uncover the wonders that await you in these extraordinary dive sites near Tokyo Bay and Sagami Bay.
Diving Conditions Score for Jogashima
6.6
Above AverageDecent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Jogashima
Depth
11m
Visibility
7m
Experience Level
beginner
advanced
Weather Conditions for Jogashima
Wave Height
1.22m
Wind Speed
3.9 m/s
Water Temp
22.9°C
Visibility
2.76km
Cloud Cover
98%
Wave Period
7.15s
Air Temperature
22.4°C
Precipitation
0.1 mm
Detailed 7-Day Diving Forecast for Jogashima
Alpha
Dive Score Chart for Jogashima
Best time to dive: 17:00 with score 7.840603357314149/10. Water conditions: Waves 0.96m, Wind 4 m/s.Best night dive time: 19:00 with score 7.419887591240875/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Jogashima: 06:00
Sunset at Jogashima: 18:00
Optimal diving conditions at Jogashima 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: 7.8/10
Waves: 0.96m (6.95s), Wind: 4 m/s
Best Night
19:00Score: 7.4/10
Waves: 0.9m, Wind: 3.7 m/s
Seasonal Analysis for JogashimaAlpha
Historical patterns and best seasons for diving at Jogashima
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 Jogashima
Winter
Avg. Score: 7.9/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Jogashima
January
Score: 8.0
February
Score: 7.8
December
Score: 7.8
Ideal Conditions for Jogashima
Water Temp
25.4°C / 77.7°F
August
Visibility
12.0m / 39.4ft
June
Wave Height
3.3m / 10.8ft
November
Wave Period
8.0s
January
Seasonal Insights for Jogashima
Jogashima shows typical northern hemisphere patterns with August being the warmest month (25.4°C) and January the coldest (4.5°C). The calmest conditions typically occur in November with average wave heights of 3.3m 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 0.1mm 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 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.
13 Dive sites near Jogashima in
Got feedback?
Help us improve this dive site by giving us feedback.