Shark Fin Rock

Chonburi, Bang Lamung District, Pattaya, Eastern Thailand, Thailandreef85 m maxtechnical

Conditions & tides

Shark Fin RockPattaya

Good · 5/5

conditions visualisation

Good5/5

Calm and diveable right now — best window today 7 AM–5 PM.

Wind5 kn N

Current~0.5 kn W · model

Swell

0.2 m · 3s · SSE

Water

31 °C

Max depth

85 m

Conditions through the day

6 AM6 PM

Calmest current near slack — 09:15 & 21:45 local

Sunrise 06:11 · Sunset 17:48 local

Show details

Tide · local

Outlook — select a day for full conditions

On-face swell 0.2 m — the component of the swell aimed at this site’s exposed face. Current is a regional model value (Copernicus, ~9 km grid) — a guide to the area, not a precise reef measurement. Imagery © Esri · not depth or visibility.

Scored by DiveConnect's site-physics model

Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.

Dived here today? How were conditions vs. what we showed?

About this site

Shark Fin Rock, also known as Hin Chalam, is a dive site located near Koh Samaesan, roughly 40 minutes south of Pattaya, accessible by a approximately 30-minute boat ride from the mainland. The site is noted for its healthy coral gardens and sits within one of the most concentrated areas of technical diving in the Gulf of Thailand, alongside sites such as Samaesan Hole and 1/4 Mile Mouthpiece Drop.

The site drops to a maximum depth of 85 metres on a wall profile, making it the second deepest dive site in the Gulf of Thailand. This depth and wall terrain place it firmly in technical diving territory, and it is suited to experienced technical divers rather than recreational divers.

Conditions at Shark Fin Rock involve strong currents, and the best diving season runs from November to April, when water temperatures range between 27 and 30°C.

AI-written site guide

Marine life here

Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.

Bengal SergeantAbudefduf bengalensisReported here · unconfirmed
Eightband ButterflyfishChaetodon octofasciatusReported here · unconfirmed
Scissortail SergeantAbudefduf sexfasciatusReported here · unconfirmed
Mottled Lightfoot CrabGrapsus albolineatusReported here · unconfirmed
Indo-Pacific Sergeant MajorAbudefduf vaigiensisReported here · unconfirmed
Black-margined NudibranchDoriprismatica atromarginataReported here · unconfirmed
Copperband ButterflyfishChelmon rostratusReported here · unconfirmed
Synaptula reticulataReported here · unconfirmed

Diver notes

Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.

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Nearby dive sites

Shark Fin RockChon Buri, Thailand4.3 km Hardeep WreckChonburi, Bang Lamung District, Pattaya, Eastern Thailand, Thailand5.1 km SS SuddhadibThailand5.7 km SamaesanChon Buri, Thailand6.3 km Koh ChuangChonburi, Bang Lamung District, Pattaya, Eastern Thailand, Thailand7.4 km Koh ChanChonburi, Bang Lamung District, Pattaya, Eastern Thailand, Thailand8.7 km

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