Asia › Sri Lanka

Aluth Gal Mattha

5–20 mMax Depth

boatEntry

63Species

Conditions Summary

Model forecast · local time (GMT+5:30)

Planning signal71/100

Waves

1.5 m

9.9 s

Swell

1.3 m

8.0 s

Current speed

0.7 km/h

flowing toward E

Water temperature

28.6°C

Wind

7.4 km/h

→ W

Sea level

0.5 m

WavesChallenging

SwellWatch

Current speedCalm

Forecast Overview

TodayChallenging

Waves1.5–1.5 mCurrent speed1.5 km/h maxWater temperature28.8°C

TomorrowChallenging

Waves1.5–1.6 mCurrent speed1.8 km/h maxWater temperature28.9°C

Tue, Sep 8Challenging

Waves1.6–1.9 mCurrent speed1.7 km/h maxWater temperature28.9°C

Wed, Sep 9Challenging

Waves1.9–1.9 mCurrent speed1.7 km/h maxWater temperature28.8°C

Next 72 hours

06:00

Waves: 1.5 m

Current speed: 0.7 km/h

Water temperature: 28.6°C

12:00

Waves: 1.5 m

Current speed: 1.3 km/h

Water temperature: 28.9°C

18:00

Waves: 1.5 m

Current speed: 1.3 km/h

Water temperature: 29.0°C

00:00

Waves: 1.5 m

Current speed: 0.9 km/h

Water temperature: 28.8°C

06:00

Waves: 1.5 m

Current speed: 0.7 km/h

Water temperature: 28.7°C

12:00

Waves: 1.5 m

Current speed: 1.6 km/h

Water temperature: 29.0°C

18:00

Waves: 1.6 m

Current speed: 1.7 km/h

Water temperature: 29.1°C

00:00

Waves: 1.6 m

Current speed: 1.5 km/h

Water temperature: 28.9°C

06:00

Waves: 1.7 m

Current speed: 1.0 km/h

Water temperature: 28.8°C

12:00

Waves: 1.7 m

Current speed: 1.7 km/h

Water temperature: 29.0°C

18:00

Waves: 1.8 m

Current speed: 1.5 km/h

Water temperature: 29.0°C

00:00

Waves: 1.9 m

Current speed: 1.7 km/h

Water temperature: 28.9°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.

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

Apr 29.5°

Jan27.8°

Feb28.2°

Mar29.0°

Apr29.5°

May29.0°

Jun28.2°

Jul27.5°

Aug27.6°

Sep27.8°

Oct28.1°

Nov28.5°

Dec28.2°

Current: mild

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 Waterbeginner Difficulty

Data source & current conditions

Profile facts were imported from DeepLog. ScubaProof adds nearby-center links and presents the recorded fields without treating missing data as confirmation. Conditions, access, permits, and site suitability can change; confirm them with a local operator before diving.

View the source profile →

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

Halgerda punctata

DeepLog4

Sea goldie

Pseudanthias squamipinnis

DeepLog4

Black stripped hypselodoris

Hypselodoris nigrostriata

DeepLog3

Bluering angelfish

Pomacanthus annularis

DeepLog3

Red-toothed triggerfish

Odonus niger

DeepLog3

Regal demoiselle

Neopomacentrus cyanomos

DeepLog3

Butterfly fish

Chaetodon decussatus

DeepLog2

Goldband fusilier

Pterocaesio chrysozona

DeepLog2

Goniobranchus geminus

DeepLog2

Goniobranchus setoensis

DeepLog2

Longfin batfish

Platax teira

DeepLog2

Lunartail snapper

Lutjanus lunulatus

DeepLog2

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

DeepLog + OBIS →

Photos