Asia › Indonesia

Simons Reef

5–25 mMax Depth

boatEntry

13Species

Conditions Summary

Model forecast · local time (GMT+8)

Model conditions signal81/100

Waves

0.9 m

10.9 s

Swell

0.8 m

10.8 s

Current speed

0.7 km/h

flowing toward W

Water temperature

29.6°C

Wind

9.1 km/h

→ S

Sea level

0.2 m

rising

WavesWatch

SwellWatch

Current speedCalm

Planning window

08:00–09:00

Calmest model window

Forecast Overview

Tue, Oct 20Watch

Waves0.9–0.9 mCurrent speed1.2 km/h maxWater temperature29.4°C

TodayWatch

Waves0.7–0.9 mCurrent speed1.3 km/h maxWater temperature29.0°C

TomorrowWatch

Waves0.6–0.9 mCurrent speed1.2 km/h maxWater temperature29.0°C

Fri, Oct 23Watch

Waves0.8–1.1 mCurrent speed1.5 km/h maxWater temperature29.0°C

Next 72 hours

15:00

Waves: 0.9 m

Current speed: 0.9 km/h

Water temperature: 29.6°C

21:00

Waves: 0.9 m

Current speed: 1.0 km/h

Water temperature: 29.3°C

03:00

Waves: 0.9 m

Current speed: 1.0 km/h

Water temperature: 29.0°C

09:00

Waves: 0.8 m

Current speed: 1.0 km/h

Water temperature: 29.0°C

15:00

Waves: 0.9 m

Current speed: 0.6 km/h

Water temperature: 29.2°C

21:00

Waves: 0.8 m

Current speed: 0.7 km/h

Water temperature: 29.0°C

03:00

Waves: 0.7 m

Current speed: 1.0 km/h

Water temperature: 28.9°C

09:00

Waves: 0.7 m

Current speed: 1.0 km/h

Water temperature: 28.9°C

15:00

Waves: 0.8 m

Current speed: 0.7 km/h

Water temperature: 29.2°C

21:00

Waves: 0.8 m

Current speed: 0.9 km/h

Water temperature: 29.0°C

03:00

Waves: 0.8 m

Current speed: 1.5 km/h

Water temperature: 28.9°C

09:00

Waves: 0.9 m

Current speed: 1.1 km/h

Water temperature: 29.0°C

Catalog depth5–25 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

May-Oct

Peak month

Apr 29.4°

Jan28.7°

Feb28.5°

Mar28.8°

Apr29.4°

May29.2°

Jun28.6°

Jul27.8°

Aug27.5°

Sep27.8°

Oct28.5°

Nov29.2°

Dec29.0°

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

Atlantic green turtle

Chelonia mydas

DeepLog2

Crocus giant clam

Tridacna crocea

DeepLog1

Goniobranchus geometricus

DeepLog1

Leopard blenny

Exallias brevis

DeepLog1

Nudibranch

Phyllidia varicosa

DeepLog1

Red-lined kentrodoris

Jorunna rubescens

DeepLog1

Sea cucumber

Thelenota anax

DeepLog1

Sea cucumber

Holothuria atra

DeepLog1

Sky blue phyllidia

Phyllidia coelestis

DeepLog1

Spotted boxfish

Ostracion meleagris

DeepLog1

Strawberry conch

Conomurex luhuanus

DeepLog1

Variable neon slug

Nembrotha kubaryana

DeepLog1

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

DeepLog + OBIS →

Photos