Japan

Manza Dreamhole

5–30 mMax Depth

boatEntry

100Species

Conditions Summary

Model forecast · local time (GMT+9)

Model conditions signal100/100

Waves

0.4 m

6.6 s

Swell

0.4 m

5.7 s

Current speed

0.3 km/h

flowing toward SW

Water temperature

28.0°C

Wind

4.4 km/h

→ NE

Sea level

1.3 m

falling

WavesCalm

SwellCalm

Current speedCalm

Planning window

10:45–10:00

Calmest model window

Forecast Overview

Fri, Oct 16Calm

Waves0.4–0.5 mCurrent speed0.4 km/h maxWater temperature28.2°C

Sat, Oct 17Calm

Waves0.4–0.7 mCurrent speed0.6 km/h maxWater temperature27.9°C

Sun, Oct 18Watch

Waves0.4–0.7 mCurrent speed0.5 km/h maxWater temperature28.0°C

Mon, Oct 19Calm

Waves0.4–0.4 mCurrent speed0.3 km/h maxWater temperature27.9°C

Next 72 hours

10:00

Waves: 0.5 m

Current speed: 0.2 km/h

Water temperature: 27.9°C

16:00

Waves: 0.4 m

Current speed: 0.4 km/h

Water temperature: 28.4°C

22:00

Waves: 0.4 m

Current speed: 0.2 km/h

Water temperature: 28.0°C

04:00

Waves: 0.4 m

Current speed: 0.2 km/h

Water temperature: 27.9°C

10:00

Waves: 0.4 m

Current speed: 0.4 km/h

Water temperature: 27.9°C

16:00

Waves: 0.6 m

Current speed: 0.6 km/h

Water temperature: 28.1°C

22:00

Waves: 0.7 m

Current speed: 0.4 km/h

Water temperature: 27.9°C

04:00

Waves: 0.6 m

Current speed: 0.2 km/h

Water temperature: 27.9°C

10:00

Waves: 0.6 m

Current speed: 0.2 km/h

Water temperature: 27.9°C

16:00

Waves: 0.5 m

Current speed: 0.5 km/h

Water temperature: 28.1°C

22:00

Waves: 0.4 m

Current speed: 0.2 km/h

Water temperature: 28.0°C

04:00

Waves: 0.4 m

Current speed: 0.0 km/h

Water temperature: 27.9°C

Catalog depth5–30 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-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

cavesalt Wateradvanced 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

Pacific asaphis

Asaphis violascens

DeepLog5

Hebrew cone

Conus ebraeus

DeepLog4

Nudibranch

Chromodoris willani

DeepLog4

Fire goby

Nemateleotris magnifica

DeepLog3

Jagged false limpet

Siphonaria laciniosa

DeepLog3

Red lionfish

Pterois volitans

DeepLog3

Coleman's chromodoris

Chromodoris colemani

DeepLog2

Crocus giant clam

Tridacna crocea

DeepLog2

Manybar goatfish

Parupeneus multifasciatus

DeepLog2

Nudibranch

Reticulidia fungia

DeepLog2

Pacific blue seastar

Linckia laevigata

DeepLog2

Plicate nerite

Nerita plicata

DeepLog2

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

DeepLog + OBIS →

Photos