Japan

Hanagoi Reef

15–30 mMax Depth

boatEntry

11Species

Conditions Summary

Model forecast · local time (GMT+9)

Model conditions signal91/100

Waves

0.8 m

5.5 s

Swell

0.5 m

4.4 s

Current speed

0.9 km/h

flowing toward W

Water temperature

28.6°C

Wind

17.4 km/h

→ E

Sea level

1.5 m

rising

WavesWatch

SwellCalm

Current speedCalm

Planning window

19:45–19:00

Calmest model window

Forecast Overview

Sat, Oct 17Watch

Waves0.8–0.9 mCurrent speed1.3 km/h maxWater temperature28.5°C

Sun, Oct 18Challenging

Waves0.9–1.1 mCurrent speed1.5 km/h maxWater temperature28.6°C

Mon, Oct 19Watch

Waves0.9–1.1 mCurrent speed0.9 km/h maxWater temperature28.6°C

Tue, Oct 20Challenging

Waves1.0–1.4 mCurrent speed1.2 km/h maxWater temperature28.6°C

Next 72 hours

19:00

Waves: 0.8 m

Current speed: 0.7 km/h

Water temperature: 28.6°C

01:00

Waves: 1.0 m

Current speed: 0.8 km/h

Water temperature: 28.5°C

07:00

Waves: 1.1 m

Current speed: 0.7 km/h

Water temperature: 28.5°C

13:00

Waves: 1.1 m

Current speed: 1.0 km/h

Water temperature: 28.6°C

19:00

Waves: 1.1 m

Current speed: 0.2 km/h

Water temperature: 28.6°C

01:00

Waves: 1.0 m

Current speed: 0.4 km/h

Water temperature: 28.5°C

07:00

Waves: 0.9 m

Current speed: 0.3 km/h

Water temperature: 28.5°C

13:00

Waves: 0.9 m

Current speed: 0.8 km/h

Water temperature: 28.7°C

19:00

Waves: 0.9 m

Current speed: 0.2 km/h

Water temperature: 28.7°C

01:00

Waves: 1.0 m

Current speed: 1.0 km/h

Water temperature: 28.5°C

07:00

Waves: 1.1 m

Current speed: 0.0 km/h

Water temperature: 28.5°C

13:00

Waves: 1.2 m

Current speed: 0.6 km/h

Water temperature: 28.7°C

Catalog depth15–30 m

Data sources & field guideOpen-Meteo Marine + Weather APIs

Planning context, not a safety guarantee. Coastal model accuracy is limited. Confirm the actual briefing, entry, exit, and suitability with a local operator.

Open-Meteo Marine + Weather APIs →

Dive readiness

Collecting the latest marine conditions and forecast signals.

Seasons · water temperature

12-month outlook

Best window

Apr-Oct

Peak month

Jul 29.1°

Jan23.4°

Feb23.0°

Mar23.4°

Apr24.5°

May26.3°

Jun28.0°

Jul29.1°

Aug29.1°

Sep28.4°

Oct27.3°

Nov26.0°

Dec24.5°

Current: moderate

Typical visibility: 20 m

Historical planning data from the recorded site profile. Water temperature and conditions can vary by day, depth, and weather; confirm current conditions with a local operator.

Explore nearby centers on the map

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Dive Types

reefsalt Waterintermediate Difficulty

Questions to ask a local operator

What are today's current, visibility, entry, and exit conditions?
Does the planned route stay within my certification and recent experience?
Are there local permits, conservation rules, or equipment requirements?

Common Species

12 km · nearby observations

Scissortail sergeant

Abudefduf sexfasciatus

DeepLog2

Bigeye barracuda

Sphyraena forsteri

DeepLog1

Bigeye trevally

Caranx sexfasciatus

DeepLog1

Blackpatch triggerfish

Rhinecanthus verrucosus

DeepLog1

Nudibranch

Reticulidia fungia

DeepLog1

Pelodiscus sinensis

DeepLog1

Pustulose wart slug

Phyllidiella pustulosa

DeepLog1

Raffle's butterflyfish

Chaetodon rafflesii

DeepLog1

Rhinogobius nagoyae

DeepLog1

Rolling clam

Hippopus hippopus

DeepLog1

Silvermouth turban

Turbo argyrostomus

DeepLog1

リュウキュウスガモ

Thalassia hemprichii

Nearby OBIS observations26

These are nearby biodiversity records, not a guarantee that every species will be seen on a particular dive.

DeepLog + OBIS →

Photos