Thailand
Koh Tachai (Thailand Similan Islands)
5–30 mMax Depth
boatEntry
5Species
Conditions Summary
Model forecast · local time (GMT+7)
Model conditions signal100/100
Waves
0.4 m
9.0 s
Swell
0.3 m
11.4 s
Current speed
0.2 km/h
flowing toward E
Water temperature
30.3°C
Wind
12.3 km/h
→ S
Sea level
0.2 m
rising
WavesCalm
SwellCalm
Current speedCalm
Planning window
11:45–11:00
Calmest model window
Forecast Overview
Tue, Oct 20Calm
Waves0.4–0.5 mCurrent speed0.4 km/h maxWater temperature30.3°C
TodayWatch
Waves0.5–0.6 mCurrent speed0.9 km/h maxWater temperature30.2°C
TomorrowCalm
Waves0.4–0.5 mCurrent speed0.7 km/h maxWater temperature30.2°C
Fri, Oct 23Calm
Waves0.5–0.5 mCurrent speed0.4 km/h maxWater temperature30.1°C
Next 72 hours
Catalog depth5–30 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 29.8°
Jan28.4°
Feb28.7°
Mar29.2°
Apr29.8°
May29.8°
Jun29.4°
Jul29.1°
Aug28.9°
Sep28.6°
Oct28.4°
Nov28.7°
Dec28.5°
Current: strong
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 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
Atlantic green turtle
Chelonia mydas
DeepLog1
Black and white snapper
Macolor niger
DeepLog1
Bluefin trevally
Caranx melampygus
DeepLog1
Tube coral
Tubastraea micranthus
DeepLog1
Two-spot red snapper
Lutjanus bohar
DeepLog1
Scarus rubroviolaceus
Nearby OBIS observations8
Phyllidia varicosa
Nearby OBIS observations6
Trimma sanguinellum
Nearby OBIS observations6
Pteraeolidia semperi
Nearby OBIS observations5
Sponges
Porifera
Nearby OBIS observations5
Chaetodon trifasciatus
Nearby OBIS observations4
Melichthys indicus
Nearby OBIS observations4
These are nearby biodiversity records, not a guarantee that every species will be seen on a particular dive.
DeepLog + OBIS →Photos
