Hakodate
Surrounded by the pristine waters of Usushiri in Hakodate City, Hokkaido, our dive site boasts an exceptional ecological balance and biodiversity. With water temperatures ranging from 2 degrees Celsius at its lowest to a comfortable 21 degrees Celsius in the summer, this location offers year-round diving opportunities.
One of the highlights in March is the chance to witness the hatching of Whitefish offspring. From March to April, you'll also find the lingcod breeding season, where stunning egg masses can be observed. Additionally, keep an eye out for other captivating marine life such as criones and jellyfish riders.
Perfect for beginners, the shallow depths and easy beach entry make this a suitable spot for all skill levels. Donan, in particular, is renowned for its abundant kelp, with captivating seaweed fields that should not be missed.
Enhance your diving experience with the following details:
- Visibility: 0m
- Max depth: 0m
- Recommended Diver Level: Advanced, Expert
- Country: Japan
- Close Location: 国道279号（海上区間）, Oma, Shimokita County, Oshima Subprefecture, Aomori Prefecture, 039-4601, Japan
One of the highlights in March is the chance to witness the hatching of Whitefish offspring. From March to April, you'll also find the lingcod breeding season, where stunning egg masses can be observed. Additionally, keep an eye out for other captivating marine life such as criones and jellyfish riders.
Perfect for beginners, the shallow depths and easy beach entry make this a suitable spot for all skill levels. Donan, in particular, is renowned for its abundant kelp, with captivating seaweed fields that should not be missed.
Enhance your diving experience with the following details:
- Visibility: 0m
- Max depth: 0m
- Recommended Diver Level: Advanced, Expert
- Country: Japan
- Close Location: 国道279号（海上区間）, Oma, Shimokita County, Oshima Subprefecture, Aomori Prefecture, 039-4601, Japan
Diving Conditions Score for Hakodate
4.2
Below AverageChallenging conditions, for experienced divers only.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Hakodate
Experience Level
advanced
expert
Weather Conditions for Hakodate
Wave Height
1.22m
Wind Speed
14.1 m/s
Water Temp
19.2°C
Visibility
12.88km
Cloud Cover
31%
Wave Period
6s
Air Temperature
17.2°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Hakodate
Alpha
Dive Score Chart for Hakodate
Best time to dive: 6:00 with score 5.3624/10. Water conditions: Waves 1.16m, Wind 15.7 m/s.Best night dive time: 0:00 with score 5.17189002624672/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Hakodate: 06:00
Sunset at Hakodate: 18:00
Optimal diving conditions at Hakodate 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
6:00Score: 5.4/10
Waves: 1.16m (5.95s), Wind: 15.7 m/s
Best Night
0:00Score: 5.2/10
Waves: 0.94m, Wind: 13.1 m/s
Seasonal Analysis for HakodateAlpha
Historical patterns and best seasons for diving at Hakodate
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 Hakodate
Winter
Avg. Score: 8.2/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Hakodate
January
Score: 8.4
December
Score: 8.2
February
Score: 7.9
Ideal Conditions for Hakodate
Water Temp
20.5°C / 68.9°F
August
Visibility
14.4m / 47.2ft
November
Wave Height
1.2m / 3.9ft
January
Wave Period
8.0s
January
Seasonal Insights for Hakodate
Hakodate shows typical northern hemisphere patterns with August being the warmest month (20.5°C) and January the coldest (-8.0°C). The calmest conditions typically occur in January with average wave heights of 1.2m 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 0.0mm 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.
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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