Guam

Umatac

5–20 mMax Depth

shoreEntry

56Species

Conditions Summary

Model forecast · local time (GMT+10)

Model conditions signal61/100

Waves

1.6 m

8.6 s

Swell

1.4 m

6.5 s

Current speed

2.7 km/h

flowing toward N

Water temperature

28.3°C

Wind

10.0 km/h

→ E

Sea level

0.6 m

rising

WavesChallenging

SwellWatch

Current speedWatch

Forecast Overview

TodayChallenging

Waves1.4–1.6 mCurrent speed2.7 km/h maxWater temperature28.5°C

TomorrowChallenging

Waves1.4–1.5 mCurrent speed1.9 km/h maxWater temperature28.5°C

Fri, Oct 23Challenging

Waves1.4–1.5 mCurrent speed2.3 km/h maxWater temperature28.4°C

Next 72 hours

00:00

Waves: 1.6 m

Current speed: 2.7 km/h

Water temperature: 28.3°C

06:00

Waves: 1.5 m

Current speed: 0.9 km/h

Water temperature: 28.3°C

12:00

Waves: 1.4 m

Current speed: 0.3 km/h

Water temperature: 28.5°C

18:00

Waves: 1.4 m

Current speed: 1.1 km/h

Water temperature: 28.7°C

00:00

Waves: 1.4 m

Current speed: 0.9 km/h

Water temperature: 28.4°C

06:00

Waves: 1.4 m

Current speed: 1.1 km/h

Water temperature: 28.4°C

12:00

Waves: 1.4 m

Current speed: 1.9 km/h

Water temperature: 28.5°C

18:00

Waves: 1.5 m

Current speed: 1.4 km/h

Water temperature: 28.6°C

00:00

Waves: 1.5 m

Current speed: 0.9 km/h

Water temperature: 28.4°C

06:00

Waves: 1.5 m

Current speed: 1.2 km/h

Water temperature: 28.3°C

12:00

Waves: 1.5 m

Current speed: 2.2 km/h

Water temperature: 28.4°C

18:00

Waves: 1.5 m

Current speed: 1.4 km/h

Water temperature: 28.5°C

Catalog depth5–20 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.

Updated: cached data

Open-Meteo Marine + Weather APIs →

Dive readiness

Collecting the latest marine conditions and forecast signals.

Seasons · water temperature

12-month outlook

Best window

Jan-Jun

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

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

Nypa fruticans

DeepLog3

Yellow angel-fish

Centropyge flavissima

DeepLog3

Guam damsel

Pomachromis guamensis

DeepLog2

Indo-Pacific sergeant

Abudefduf vaigiensis

DeepLog2

Octopus coral

Galaxea fascicularis

DeepLog2

Spotted boxfish

Ostracion meleagris

DeepLog2

Striate boomerang coral

Herpolitha limax

DeepLog2

Thuridilla bayeri

DeepLog2

Anemone coral

Goniopora fruticosa

DeepLog1

Bird wrasse

Gomphosus varius

DeepLog1

Black and white snapper

Macolor niger

DeepLog1

Blackside hawkfish

Paracirrhites forsteri

DeepLog1

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

DeepLog + OBIS →

Photos