Thailand

Koh Si

5–25 mMax Depth

boatEntry

47Species

Conditions Summary

Model forecast · local time (GMT+7)

Model conditions signal100/100

Waves

0.1 m

4.7 s

Swell

0.1 m

3.2 s

Current speed

0.2 km/h

flowing toward S

Water temperature

31.1°C

Wind

14.2 km/h

→ E

Sea level

0.9 m

falling

WavesCalm

SwellCalm

Current speedCalm

Planning window

07:30–07:00

Calmest model window

Forecast Overview

TodayCalm

Waves0.1–0.1 mCurrent speed0.5 km/h maxWater temperature31.3°C

TomorrowCalm

Waves0.1–0.1 mCurrent speed0.7 km/h maxWater temperature31.3°C

Fri, Oct 23Calm

Waves0.1–0.2 mCurrent speed0.7 km/h maxWater temperature31.2°C

Sat, Oct 24Calm

Waves0.2–0.3 mCurrent speed0.7 km/h maxWater temperature31.0°C

Next 72 hours

07:00

Waves: 0.1 m

Current speed: 0.2 km/h

Water temperature: 31.1°C

13:00

Waves: 0.1 m

Current speed: 0.3 km/h

Water temperature: 31.4°C

19:00

Waves: 0.1 m

Current speed: 0.2 km/h

Water temperature: 31.3°C

01:00

Waves: 0.1 m

Current speed: 0.0 km/h

Water temperature: 31.2°C

07:00

Waves: 0.1 m

Current speed: 0.2 km/h

Water temperature: 31.1°C

13:00

Waves: 0.1 m

Current speed: 0.4 km/h

Water temperature: 31.5°C

19:00

Waves: 0.1 m

Current speed: 0.4 km/h

Water temperature: 31.3°C

01:00

Waves: 0.1 m

Current speed: 0.4 km/h

Water temperature: 31.2°C

07:00

Waves: 0.1 m

Current speed: 0.3 km/h

Water temperature: 31.1°C

13:00

Waves: 0.1 m

Current speed: 0.5 km/h

Water temperature: 31.4°C

19:00

Waves: 0.2 m

Current speed: 0.4 km/h

Water temperature: 31.2°C

01:00

Waves: 0.2 m

Current speed: 0.5 km/h

Water temperature: 31.1°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

Nov-Apr

Peak month

May 30.3°

Jan28.3°

Feb28.8°

Mar29.4°

Apr30.2°

May30.3°

Jun30.0°

Jul29.8°

Aug29.6°

Sep29.2°

Oct29.0°

Nov28.9°

Dec28.6°

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

reefboatsalt 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

Palmer's damsel-fish

Abudefduf bengalensis

DeepLog7

Streaked spinefoot

Siganus javus

DeepLog7

Eight banded butterfly fish

Chaetodon octofasciatus

DeepLog6

Moon wrasse

Thalassoma lunare

DeepLog6

Parrotfish

Scarus quoyi

DeepLog6

Rock cod

Cephalopholis formosa

DeepLog5

Two-lined monocle bream

Scolopsis bilineata

DeepLog5

Moorish idol

Zanclus cornutus

DeepLog4

Barhead spinefoot

Siganus virgatus

DeepLog3

Indo-Pacific sergeant

Abudefduf vaigiensis

DeepLog3

Saw-jawed monocle bream

Scolopsis ciliata

DeepLog3

Bay of Bengal hogfish

Bodianus neilli

DeepLog2

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

DeepLog + OBIS →

Photos