Japan

Devil's Cove

5–20 mMax Depth

shoreEntry

70Species

Conditions Summary

Model forecast · local time (GMT+9)

Model conditions signal91/100

Waves

0.6 m

4.8 s

Swell

0.4 m

4.2 s

Current speed

0.4 km/h

flowing toward NW

Water temperature

28.0°C

Wind

19.6 km/h

→ E

Sea level

1.2 m

falling

WavesWatch

SwellCalm

Current speedCalm

Planning window

12:30–12:00

Calmest model window

Forecast Overview

Sun, Oct 18Watch

Waves0.5–0.6 mCurrent speed0.4 km/h maxWater temperature28.0°C

Mon, Oct 19Calm

Waves0.4–0.6 mCurrent speed1.0 km/h maxWater temperature27.9°C

Tue, Oct 20Watch

Waves0.5–0.6 mCurrent speed0.8 km/h maxWater temperature27.9°C

TodayWatch

Waves0.6–0.8 mCurrent speed1.0 km/h maxWater temperature27.9°C

Next 72 hours

12:00

Waves: 0.6 m

Current speed: 0.4 km/h

Water temperature: 28.0°C

18:00

Waves: 0.5 m

Current speed: 0.3 km/h

Water temperature: 28.0°C

00:00

Waves: 0.6 m

Current speed: 0.4 km/h

Water temperature: 27.9°C

06:00

Waves: 0.5 m

Current speed: 0.8 km/h

Water temperature: 27.8°C

12:00

Waves: 0.4 m

Current speed: 0.9 km/h

Water temperature: 28.0°C

18:00

Waves: 0.5 m

Current speed: 0.6 km/h

Water temperature: 28.1°C

00:00

Waves: 0.5 m

Current speed: 0.3 km/h

Water temperature: 27.8°C

06:00

Waves: 0.5 m

Current speed: 0.4 km/h

Water temperature: 27.8°C

12:00

Waves: 0.5 m

Current speed: 0.7 km/h

Water temperature: 28.0°C

18:00

Waves: 0.5 m

Current speed: 0.6 km/h

Water temperature: 28.1°C

00:00

Waves: 0.6 m

Current speed: 0.3 km/h

Water temperature: 27.9°C

06:00

Waves: 0.7 m

Current speed: 0.5 km/h

Water temperature: 27.9°C

Catalog depth5–20 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-Nov

Peak month

Aug 28.9°

Jan22.3°

Feb21.5°

Mar21.5°

Apr22.5°

May24.5°

Jun26.6°

Jul28.6°

Aug28.9°

Sep28.3°

Oct27.0°

Nov25.3°

Dec23.7°

Current: mild

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 Waterbeginner 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

Sky blue phyllidia

Phyllidia coelestis

DeepLog6

Black sea cucumber

Stichopus chloronotus

DeepLog4

Red tomato clown

Amphiprion frenatus

DeepLog4

Sea cucumber

Holothuria atra

DeepLog4

Turtlehead sea snake

Emydocephalus ijimae

DeepLog4

White threads fish

Holothuria leucospilota

DeepLog3

Leaf scorpionfish

Taenianotus triacanthus

DeepLog2

Nudibranch

Phyllidia ocellata

DeepLog2

Rock-boring urchin

Echinometra mathaei

DeepLog2

Sacoglossan

Plakobranchus ocellatus

DeepLog2

Anna's chromodoris

Chromodoris annae

DeepLog1

Aplysia argus

DeepLog1

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

DeepLog + OBIS →

Photos