Guam

Apra Harbor

10–36 mMax Depth

boatEntry

48Species

Conditions Summary

Model forecast · local time (GMT+10)

Model conditions signal61/100

Waves

3.0 m

8.2 s

Swell

1.4 m

8.4 s

Current speed

1.9 km/h

flowing toward NE

Water temperature

28.3°C

Wind

33.5 km/h

→ SE

Sea level

0.7 m

rising

WavesChallenging

SwellWatch

Current speedWatch

Forecast Overview

Mon, Oct 19Challenging

Waves2.3–3.0 mCurrent speed1.9 km/h maxWater temperature28.2°C

Tue, Oct 20Challenging

Waves1.6–2.2 mCurrent speed2.1 km/h maxWater temperature28.4°C

TodayChallenging

Waves1.5–1.6 mCurrent speed1.3 km/h maxWater temperature28.4°C

TomorrowChallenging

Waves1.5–1.5 mCurrent speed1.1 km/h maxWater temperature28.3°C

Next 72 hours

13:00

Waves: 3.0 m

Current speed: 1.9 km/h

Water temperature: 28.3°C

19:00

Waves: 2.5 m

Current speed: 0.6 km/h

Water temperature: 28.2°C

01:00

Waves: 2.2 m

Current speed: 1.0 km/h

Water temperature: 28.2°C

07:00

Waves: 1.9 m

Current speed: 1.3 km/h

Water temperature: 28.2°C

13:00

Waves: 1.7 m

Current speed: 1.9 km/h

Water temperature: 28.5°C

19:00

Waves: 1.6 m

Current speed: 1.9 km/h

Water temperature: 28.6°C

01:00

Waves: 1.6 m

Current speed: 1.2 km/h

Water temperature: 28.3°C

07:00

Waves: 1.6 m

Current speed: 0.4 km/h

Water temperature: 28.3°C

13:00

Waves: 1.6 m

Current speed: 1.1 km/h

Water temperature: 28.5°C

19:00

Waves: 1.5 m

Current speed: 1.2 km/h

Water temperature: 28.5°C

01:00

Waves: 1.5 m

Current speed: 1.1 km/h

Water temperature: 28.4°C

07:00

Waves: 1.5 m

Current speed: 0.7 km/h

Water temperature: 28.3°C

Catalog depth10–36 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

Year-round

Peak month

Jul 29.4°

Jan27.9°

Feb27.6°

Mar27.7°

Apr28.1°

May28.8°

Jun29.3°

Jul29.4°

Aug29.4°

Sep29.4°

Oct29.3°

Nov29.0°

Dec28.4°

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

wrecksalt 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

Lumnitzera littorea

DeepLog4

Manybar goatfish

Parupeneus multifasciatus

DeepLog3

Rosecolored wrasse

Oxycheilinus unifasciatus

DeepLog3

Mimic surgeonfish

Acanthurus pyroferus

DeepLog2

Roundhead parrotfish

Scarus globiceps

DeepLog2

Ambon puller

Pycnochromis amboinensis

DeepLog1

Arc-eye hawkfish

Paracirrhites arcatus

DeepLog1

Barred mudskipper

Periophthalmus argentilineatus

DeepLog1

Blackside hawkfish

Paracirrhites forsteri

DeepLog1

Blotcheye soldierfish

Myripristis berndti

DeepLog1

Blue gudgeon

Ptereleotris microlepis

DeepLog1

Bluespine unicornfish

Naso unicornis

DeepLog1

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

DeepLog + OBIS →

Photos