Long Beach
Located along the coast, on the right side of a sprawling sandy beach, this dive site offers easy access through a short walk with your gear. While this pristine beach lacks restroom facilities, it provides ample parking spaces for divers. Spend some quality time here immersing yourself in the stunning natural beauty.
Exploration opportunities abound at this site, with numerous caves, enchanting plant life, and a vibrant array of small fish to discover. Keep an eye out for Mizukurage sightings and explore along the rock formations for interesting finds. Delve into the rich marine world, where surprises await at every turn, making for an exciting and enjoyable diving experience.
Visibility at this dive spot is excellent, reaching up to 9m, and the maximum depth is 11m. The site caters to divers of all levels, from beginners to advanced and expert divers. Situated in Japan, specifically at 国道229号, Iwanai, Iwanai County, Shiribeshi Subprefecture, Hokkaido Prefecture, this location offers convenient proximity for divers.
Exploration opportunities abound at this site, with numerous caves, enchanting plant life, and a vibrant array of small fish to discover. Keep an eye out for Mizukurage sightings and explore along the rock formations for interesting finds. Delve into the rich marine world, where surprises await at every turn, making for an exciting and enjoyable diving experience.
Visibility at this dive spot is excellent, reaching up to 9m, and the maximum depth is 11m. The site caters to divers of all levels, from beginners to advanced and expert divers. Situated in Japan, specifically at 国道229号, Iwanai, Iwanai County, Shiribeshi Subprefecture, Hokkaido Prefecture, this location offers convenient proximity for divers.
Diving Conditions Score for Long Beach
7.3
GoodGood diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Long Beach
Depth
11m
Visibility
9m
Experience Level
beginner
advanced
expert
Weather Conditions for Long Beach
Wave Height
0.46m
Wind Speed
3.3 m/s
Water Temp
16.7°C
Visibility
34.9km
Cloud Cover
16%
Wave Period
4.1s
Air Temperature
20.1°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Long Beach
Alpha
Dive Score Chart for Long Beach
Best time to dive: 6:00 with score 8.539511627906975/10. Water conditions: Waves 0.4m, Wind 2.9 m/s.Best night dive time: 5:00 with score 7.820260465116278/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Long Beach: 06:00
Sunset at Long Beach: 18:00
Optimal diving conditions at Long Beach 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: 8.5/10
Waves: 0.4m (4.3s), Wind: 2.9 m/s
Best Night
5:00Score: 7.8/10
Waves: 0.36m, Wind: 6.4 m/s
Seasonal Analysis for Long BeachAlpha
Historical patterns and best seasons for diving at Long Beach
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 Long Beach
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 Long Beach
January
Score: 8.5
February
Score: 8.1
December
Score: 8.0
Ideal Conditions for Long Beach
Water Temp
21.3°C / 70.3°F
July
Visibility
13.3m / 43.6ft
October
Wave Height
0.9m / 3.0ft
January
Wave Period
8.0s
January
Seasonal Insights for Long Beach
Long Beach shows typical northern hemisphere patterns with July being the warmest month (21.3°C) and January the coldest (-6.3°C). The calmest conditions typically occur in January with average wave heights of 0.9m 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 14, 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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