Thailand

Ton Sai Bay

8–25 mMax Depth

boatEntry

44Species

Conditions Summary

Model forecast · local time (GMT+7)

Model conditions signal100/100

Waves

0.3 m

6.7 s

Swell

0.3 m

3.7 s

Current speed

0.4 km/h

flowing toward SE

Water temperature

30.9°C

Wind

9.0 km/h

→ E

Sea level

0.7 m

falling

WavesCalm

SwellCalm

Current speedCalm

Planning window

08:15–08:00

Calmest model window

Forecast Overview

TodayCalm

Waves0.3–0.3 mCurrent speed0.7 km/h maxWater temperature31.0°C

TomorrowCalm

Waves0.2–0.3 mCurrent speed0.9 km/h maxWater temperature31.0°C

Fri, Oct 23Calm

Waves0.2–0.4 mCurrent speed0.9 km/h maxWater temperature31.0°C

Sat, Oct 24Calm

Waves0.3–0.6 mCurrent speed1.0 km/h maxWater temperature30.9°C

Next 72 hours

08:00

Waves: 0.3 m

Current speed: 0.4 km/h

Water temperature: 30.9°C

14:00

Waves: 0.3 m

Current speed: 0.6 km/h

Water temperature: 31.1°C

20:00

Waves: 0.3 m

Current speed: 0.5 km/h

Water temperature: 31.0°C

02:00

Waves: 0.3 m

Current speed: 0.0 km/h

Water temperature: 30.9°C

08:00

Waves: 0.3 m

Current speed: 0.6 km/h

Water temperature: 30.8°C

14:00

Waves: 0.3 m

Current speed: 0.3 km/h

Water temperature: 31.3°C

20:00

Waves: 0.2 m

Current speed: 0.8 km/h

Water temperature: 31.1°C

02:00

Waves: 0.2 m

Current speed: 0.2 km/h

Water temperature: 30.9°C

08:00

Waves: 0.3 m

Current speed: 0.5 km/h

Water temperature: 30.9°C

14:00

Waves: 0.3 m

Current speed: 0.3 km/h

Water temperature: 31.2°C

20:00

Waves: 0.3 m

Current speed: 0.8 km/h

Water temperature: 31.0°C

02:00

Waves: 0.3 m

Current speed: 0.2 km/h

Water temperature: 30.9°C

Catalog depth8–25 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.

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

Nov-Apr

Peak month

Apr 30.2°

Jan28.4°

Feb28.8°

Mar29.4°

Apr30.2°

May30.2°

Jun30.1°

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

reefshoresalt 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

Moon wrasse

Thalassoma lunare

DeepLog4

Moray eel

Gymnothorax javanicus

DeepLog4

Porcupine sea urchin

Diadema setosum

DeepLog4

Blackeye thicklip

Hemigymnus melapterus

DeepLog3

Indo-Pacific sergeant

Abudefduf vaigiensis

DeepLog3

Black-blotched porcupinefish

Diodon liturosus

DeepLog2

Harpooner sea urchin

Echinothrix calamaris

DeepLog2

Longfin grouper

Epinephelus quoyanus

DeepLog2

Moorish idol

Zanclus cornutus

DeepLog2

Pharaoh cuttlefish

Acanthosepion pharaonis

DeepLog2

Scrawled filefish

Aluterus scriptus

DeepLog2

Starry grouper

Cephalopholis polyspila

DeepLog2

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

DeepLog + OBIS →

Photos