Asia › Indonesia

Harto's Reef

5–30 mMax Depth

boatEntry

91Species

Conditions Summary

Model forecast · local time (GMT+9)

Model conditions signal90/100

Waves

0.4 m

2.9 s

Swell

0.2 m

2.9 s

Current speed

1.7 km/h

flowing toward N

Water temperature

29.5°C

Wind

17.9 km/h

→ SW

Sea level

0.5 m

rising

WavesCalm

SwellCalm

Current speedWatch

Planning window

13:45–13:00

Calmest model window

Forecast Overview

Tue, Oct 20Calm

Waves0.3–0.4 mCurrent speed1.7 km/h maxWater temperature29.5°C

TodayCalm

Waves0.2–0.3 mCurrent speed1.6 km/h maxWater temperature29.6°C

TomorrowCalm

Waves0.1–0.2 mCurrent speed1.5 km/h maxWater temperature29.7°C

Fri, Oct 23Calm

Waves0.2–0.3 mCurrent speed1.4 km/h maxWater temperature29.4°C

Next 72 hours

13:00

Waves: 0.4 m

Current speed: 1.7 km/h

Water temperature: 29.4°C

19:00

Waves: 0.3 m

Current speed: 1.3 km/h

Water temperature: 29.5°C

01:00

Waves: 0.2 m

Current speed: 1.2 km/h

Water temperature: 29.4°C

07:00

Waves: 0.2 m

Current speed: 1.0 km/h

Water temperature: 29.3°C

13:00

Waves: 0.3 m

Current speed: 1.5 km/h

Water temperature: 29.7°C

19:00

Waves: 0.2 m

Current speed: 1.5 km/h

Water temperature: 29.7°C

01:00

Waves: 0.2 m

Current speed: 1.2 km/h

Water temperature: 29.5°C

07:00

Waves: 0.1 m

Current speed: 0.9 km/h

Water temperature: 29.4°C

13:00

Waves: 0.1 m

Current speed: 1.5 km/h

Water temperature: 29.9°C

19:00

Waves: 0.1 m

Current speed: 1.3 km/h

Water temperature: 29.8°C

01:00

Waves: 0.2 m

Current speed: 1.0 km/h

Water temperature: 29.4°C

07:00

Waves: 0.2 m

Current speed: 1.2 km/h

Water temperature: 29.3°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

Oct-Apr

Peak month

Nov 29.4°

Jan29.0°

Feb28.9°

Mar29.1°

Apr29.3°

May29.3°

Jun29.0°

Jul28.6°

Aug28.5°

Sep28.7°

Oct29.1°

Nov29.4°

Dec29.3°

Current: moderate

Typical visibility: 15 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

Northern spined chiton

Acanthopleura gemmata

DeepLog3

Painted thecacera

Thecacera picta

DeepLog3

Redfin hogfish

Bodianus dictynna

DeepLog3

Titan triggerfish

Balistoides viridescens

DeepLog3

Bath's comb-tooth

Ecsenius bathi

DeepLog2

Blackspotted puffer

Arothron nigropunctatus

DeepLog2

Blackstriped angelfish

Genicanthus lamarck

DeepLog2

Coral hind

Cephalopholis miniata

DeepLog2

Cushion seastar

Culcita novaeguineae

DeepLog2

Horned bull-fish

Heniochus varius

DeepLog2

Navarchus angelfish

Pomacanthus navarchus

DeepLog2

Nudibranch

Phyllidia varicosa

DeepLog2

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

DeepLog + OBIS →

Photos