Palau

Ulong Sandbar

5–15 mMax Depth

boatEntry

3Species

Conditions Summary

Model forecast · local time (GMT+9)

Model conditions signal81/100

Waves

1.2 m

5.2 s

Swell

0.5 m

5.3 s

Current speed

0.6 km/h

flowing toward E

Water temperature

29.6°C

Wind

28.4 km/h

→ W

Sea level

0.2 m

rising

WavesChallenging

SwellCalm

Current speedCalm

Forecast Overview

Mon, Oct 19Challenging

Waves1.2–1.4 mCurrent speed0.7 km/h maxWater temperature29.6°C

Tue, Oct 20Challenging

Waves1.5–1.9 mCurrent speed0.8 km/h maxWater temperature29.4°C

TodayChallenging

Waves1.7–2.0 mCurrent speed0.6 km/h maxWater temperature29.3°C

TomorrowChallenging

Waves1.5–1.7 mCurrent speed0.4 km/h maxWater temperature29.3°C

Next 72 hours

09:00

Waves: 1.2 m

Current speed: 0.6 km/h

Water temperature: 29.6°C

15:00

Waves: 1.3 m

Current speed: 0.7 km/h

Water temperature: 29.7°C

21:00

Waves: 1.4 m

Current speed: 0.6 km/h

Water temperature: 29.6°C

03:00

Waves: 1.6 m

Current speed: 0.8 km/h

Water temperature: 29.5°C

09:00

Waves: 1.7 m

Current speed: 0.7 km/h

Water temperature: 29.4°C

15:00

Waves: 1.7 m

Current speed: 0.7 km/h

Water temperature: 29.4°C

21:00

Waves: 1.8 m

Current speed: 0.7 km/h

Water temperature: 29.3°C

03:00

Waves: 2.0 m

Current speed: 0.5 km/h

Water temperature: 29.3°C

09:00

Waves: 2.0 m

Current speed: 0.4 km/h

Water temperature: 29.3°C

15:00

Waves: 1.8 m

Current speed: 0.4 km/h

Water temperature: 29.4°C

21:00

Waves: 1.7 m

Current speed: 0.3 km/h

Water temperature: 29.3°C

03:00

Waves: 1.6 m

Current speed: 0.2 km/h

Water temperature: 29.3°C

Catalog depth5–15 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

Nov-Apr

Peak month

Jun 29.5°

Jan28.4°

Feb28.1°

Mar28.3°

Apr28.8°

May29.3°

Jun29.5°

Jul29.2°

Aug29.0°

Sep29.1°

Oct29.3°

Nov29.4°

Dec29.1°

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

Brown-marbled grouper

Epinephelus fuscoguttatus

DeepLog1

Chevron butterflyfish

Chaetodon trifascialis

DeepLog1

Smooth cauliflower coral

Stylophora pistillata

DeepLog1

Porifera

Nearby OBIS observations12

Bryozoa

Nearby OBIS observations5

Priacanthus hamrur

Nearby OBIS observations4

Cnidaria

Nearby OBIS observations3

Demospongiae

Nearby OBIS observations3

Ecsenius yaeyamaensis

Nearby OBIS observations3

Melichthys vidua

Nearby OBIS observations3

Myripristis adusta

Nearby OBIS observations3

Pomacentrus vaiuli

Nearby OBIS observations3

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

DeepLog + OBIS →

Photos