What is the best time to dive Ogasawara (Bonin Islands)?

The best months to dive Ogasawara (Bonin Islands) in Japan are May, June, July, August, September, October. Water temperatures range from 20°C to 28°C during peak season.

How deep is Ogasawara (Bonin Islands)?

Ogasawara (Bonin Islands) reaches a maximum depth of 50 m, with visibility ranging from 25–50 m. The full depth range requires Advanced certification at minimum; some zones are technical diver territory.

What marine life can you see at Ogasawara (Bonin Islands)?

Ogasawara (Bonin Islands) is known for encounters with bottlenose dolphin, hammerhead shark, sand tiger shark, humpback whale, green turtle, giant trevally. The site features pelagic, wall, drift, reef diving across 30 named sites, with a marine life score of 82/100 in OkToDive's ranking.

Is Ogasawara (Bonin Islands) good for beginners?

Ogasawara (Bonin Islands) is better suited to experienced divers. Currents can be moderate and depths reach 50 m. A minimum Advanced Open Water certification is required, and OkToDive recommends at least 100 logged dives before visiting.

How much does it cost to dive Ogasawara (Bonin Islands)?

A 2-tank dive at Ogasawara (Bonin Islands) averages around $140 USD, placing it in the mid range tier. Both boat and shore access are available, giving divers flexibility on budget.

Ogasawara (Bonin Islands) Diving — Score: 69.0/100 | Conditions, Operators & Guide

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World Class

Advanced

Ogasawara (Bonin Islands)

JapanPacific Ocean

69.0

SCORE

27.0975°N

142.2186°E

Ogasawara is a UNESCO World Heritage archipelago 1,000 km south of Tokyo, reachable only by a 24-hour ferry that runs weekly. The isolation has preserved extraordinary marine life including wild dolphin pods, sand tiger shark caves, and winter humpback whale calving grounds. It's Japan's most remote diving destination and feels like a different planet.

Japan's Galápagos — UNESCO Deep Blue

Visibility25–50 m

Temperature20–28°C

Max Depth50 m

Currentmoderate

2-Tank Dive$140

Best MonthsMay, June, July, August

CertificationAdvanced Open WaterAdvanced

Score breakdown

Click any score to see a detailed breakdown

Marine Life

82.0

Species diversity, megafauna encounters, reef fish abundance, macro life, and endemic species.

Species Diversity

Megafauna Encounters

Reef Fish Abundance

Macro Life

Endemic Species

Marine life diversity

82.0

Coral & reef health

72.0

Visibility & conditions

85.0

Dive site variety

65.0

Water temperature

72.0

Depth & access

70.0

Operator quality

75.0

Topside experience

65.0

Getting there

25.0

Value & cost

55.0

Crowding

90.0

Social proof

72.0

Key species

bottlenose dolphin hammerhead shark sand tiger shark humpback whale green turtle giant trevally

Dive types

pelagicwalldriftreef

Traveling with non-divers?

Your non-diving travel companions will find plenty to enjoy topside while you're underwater. Here are some activities to consider.

Activities for non-divers

dolphin swimmingWWII historical sitesstar gazinghiking

Nearby cultural sites

WWII bunkers and tunnels
Ogasawara Visitor Center

Non-diver score

7/10

Good topside options for non-diving companions.

Family FriendlyNot recommended

Restaurants & Nightlifebasic

Safety & emergency

Dive insurance

DAN recommends dive insurance for all divers.

Learn more at DAN.org

Hyperbaric Chamber1000 km — Tokyo Medical and Dental University Hyperbaric Center

Nearest Hospital2 km

Small clinic on Chichijima; serious cases require emergency air evacuation to Tokyo (1,000 km) — DAN Japan mandatory

Skill LevelAdvanced

Current Strengthmoderate

Top operators

Fisheye Ogasawara

PADI

4.7

95 reviewsNITROX

Compare this dive site

Ogasawara (Bonin Islands) in Japan scores 69.0/100in OkToDive's 12-category data-driven rating. Best for pelagic diving with 25–50m visibility and 20–28°C water temps. A 2-tank dive costs ~$140 USD. Peak season: May, June, July.

Last updated: 2026-05-25

Who should dive here

Best for

+ Marine life enthusiasts seeking bottlenose dolphin encounters
+ Experienced drift divers comfortable in current
+ Wide-angle photographers wanting crystal visibility

Skip if

− You don't have Advanced certification
− You need shore access — this is boat-only

Verdict

Choose Ogasawara (Bonin Islands) over similar Pacific Ocean destinations when crowding matters more than getting there

How Ogasawara (Bonin Islands) compares

Site	Score	Visibility	Cost/dive	Best for
Ogasawara (Bonin Islands)	69.0	25–50m	$140	pelagic, wall
Kerama Islands	73.8	20–50m	$110	reef, wall
Amami-Ōshima	70.7	15–35m	$100	reef, macro
Julian Rocks	69.3	8–25m	$130	reef, pelagic
Molokini Crater	69.2	20–50m	$160	wall, reef

Honest reality check

What your dive shop won't tell you

The minimum certification printed on a brochure is the legal floor, not the honest recommendation. Here's what we actually think you should bring to this site.

Recommended logged dives

40+

Below this we'd send you somewhere easier first.

Recommended certification

Advanced Open Water

“Intermediate minimum — deep profiles and variable viz.”

What will challenge you

→Moderate currents. Expect to drift — this is not a skill-builder site for a first trip after certification.
→Recreational limit of 40 m is reachable here (max depth 50 m). Gas planning and NDL tracking matter.
→Cooler than most tropical sites — 20°C minimum. A 5 mm wetsuit is the floor for longer dives.
→Nearest hyperbaric chamber is ~1000 km away. Evacuation is slow. Dive conservative profiles and get DAN insurance before you fly.

What will surprise you

→Thermoclines can drop water temp by 8°C between the surface and depth. Your wetsuit choice should match the minimum, not the average.

Time of day

When to dive it

Every dive shop gives you this briefing at 7am. We just wrote it down. Tidal dependency: slight. Optimal window: First light to 11am for best visibility..

Morning

Viz
peak
Current
moderate
Crowd
light

reef exploration
photography

Best light and calmest conditions before afternoon wind picks up.

Afternoon

Viz
moderate
Current
moderate
Crowd
moderate

drift diving
second tank

Wind chop can reduce viz. Still diveable but morning is better.

Month-by-month

Dive forecast

Realistic conditions by month. Viz ranges are what you should actually expect, not best-case marketing numbers. Confidence % is the share of days that match this profile historically.

Month	Viz (m)	Temp (°C)	Current	Sea	Rain	Confidence	Highlights
Jan	25–38	20	Mod	Mod	Light	70%	reef fish active, peak season crowds
Feb	25–38	20	Mod	Mod	Light	70%	reef fish active, peak season crowds
Mar	25–38	20	Mod	Mod	Light	70%	reef fish active, peak season crowds
Apr	25–38	20	Mod	Mod	Light	70%	reef fish active
May	45–50	28	Mod	Calm	Dry	70%	reef fish active
Jun	45–50	28	Mod	Calm	Dry	70%	reef fish active
Jul	45–50	28	Mod	Calm	Dry	70%	reef fish active
Aug	45–50	28	Mod	Calm	Dry	70%	reef fish active
Sep	45–50	28	Mod	Calm	Dry	70%	reef fish active
Oct	25–38	20	Mod	Mod	Light	70%	reef fish active
Nov	25–38	20	Mod	Mod	Light	70%	reef fish active
Dec	25–38	20	Mod	Mod	Light	70%	reef fish active

Shoot here

Photography brief

Subjects are only half the shot. A perfect macro site is useless in a three-knot drift, and a wide-angle dream is useless at 35 m with a murky ceiling. These are the conditions, not the hype.

Macro subjects65

Wide angle89

Viz stability82

Hover friendliness55

Natural light47

Recommended kit

→Wide-angle or fisheye (8-15mm range), dual strobes for close-focus wide angle

Level up here

What this site will teach you

The dives that made you a better diver are the ones that made you uncomfortable for the right reasons. Here's what this site will quietly train you for.

Deep diving comfort
advanced
Regular dives past 30m build confidence at depth.

What it costsEstimates — calibration pending

7-day trip, per person

Rough ranges anchored to existing regional data — not booking quotes. Land-based trip, standard breakdown.

Budget

$2,150–$3,150

Hostels, shore diving, cheap eats

Flights (RT from US): $720–$880
Accommodation / day: $50–$100
Diving / day: $120–$140
Food / day: $25–$50
Transfers + misc: $80–$230

Mid-range

$3,450–$5,200

3-star hotels, standard boat ops, mix of restaurants

Flights (RT from US): $1,150–$1,450
Accommodation / day: $120–$220
Diving / day: $140–$180
Food / day: $55–$100
Transfers + misc: $80–$230

Splurge

$5,750–$9,150

Top resorts or liveaboards, premium operators

Flights (RT from US): $1,800–$2,200
Accommodation / day: $260–$500
Diving / day: $180–$240
Food / day: $110–$220
Transfers + misc: $80–$230

Budget decision guide

Choose Budget if you prioritize dive count over comfort — hostels and shore diving maximize bottom time per dollar. Choose Mid-range for the best balance of comfort and value — most divers land here. Choose Splurge for premium operators, private guides, and top-tier accommodation — worth it for special trips or non-diving partners.

Flights priced round-trip from a major US hub. Figures are per person on a shared room. Solo travelers add ~30% to accommodation.

Pair with

Build a trip around it

Most divers fly across the world for one destination and don't realise another worth-it site is 90 minutes away. Here are the honest pairings.

Best dive types here

Ogasawara (Bonin Islands) Diving — Japan

Score breakdown

Marine Life

Key species

Dive types

Traveling with non-divers?

Activities for non-divers

Nearby cultural sites

Non-diver score

Safety & emergency

Dive insurance

Top operators

Fisheye Ogasawara

Who should dive here

Best for

Skip if

Verdict

How Ogasawara (Bonin Islands) compares

What your dive shop won't tell you

When to dive it

Dive forecast

Photography brief

What this site will teach you

Deep diving comfort

7-day trip, per person

Budget decision guide

Build a trip around it