Sail Rock

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What you'll see (19)

Bigeye TrevallyCaranx sexfasciatusseen 13× near here

Bluering AngelfishPomacanthus annularisseen 12× near here

Longfin BatfishPlatax teiraseen 11× near here

Blacktip GrouperEpinephelus fasciatusseen 9× near here

Black Longspine UrchinDiadema setosumseen 8× near here

Pickhandle BarracudaSphyraena jelloseen 7× near here

Orange-spotted TrevallyFlavocaranx bajadseen 7× near here

BlubberlipPlectorhinchus gibbosusseen 6× near here

Ocellate PhyllidiaPhyllidia ocellataseen 5× near here

Pink Skunk AnemonefishAmphiprion perideraionseen 5× near here

Hong Kong ButterflyfishChaetodon wiebeliseen 4× near here

Sixband AngelfishPomacanthus sexstriatusseen 4× near here

Java RabbitfishSiganus javusseen 4× near here

Whitecheek Monocle BreamScolopsis vosmeriseen 4× near here

Blue-barred ParrotfishScarus ghobbanseen 3× near here

Herring ScadAlepes variseen 3× near here

Chocolate GrouperCephalopholis boenakseen 3× near here

Lined ButterflyfishChaetodon lineolatusseen 3× near here

Coral GrouperEpinephelus corallicolaseen 3× near here

Planning a trip

4–8 days

worth going for

Flight, then a boat or domestic hop.

1,045km from Singapore — about 12h each way, so two of those days are travel. 33 dive sites within 25km, enough for several days of diving.

When people dive it

Busiest Mar, Jul, Aug · almost nobody dives it Nov, Dec.

From 2,294 logged sightings — when divers are in the water, which is not quite the same as when visibility is best.

Dive Crew is a dive group from Singapore. Members plan trips here, log their dives, and share their photos of each site.

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Monsoon

October is the worst of the season here.

Koh Tao and its neighbours run on the opposite calendar to Phuket — the gulf is at its best while the Andaman side is shut.

Northeast monsoon

The gulf's wet season. Heavy rain, wind onto the east-facing sites, and visibility that drops to a few metres after a storm. Diving continues; it just stops being worth the flight.

The year here

JFMAMJJASOND

Best here: March, April, May, June, July, August.

Gulf of Thailand. Written by hand from how the season actually runs, calibrated against what the boats do, since a season that disagrees with the operators is wrong however good the meteorology behind it. It describes most years, not this one: the forecast above is what knows about next week.

Moon and tides

Waning gibbous

71% lit · day 20 of the lunar month

Neap tides

Neap tides — the smallest range of the month, so the weakest currents. Easy conditions and usually the clearest water, though a drift site may barely drift.

New 10 Oct Full 26 Oct

Phase computed here, not fetched. This is the spring/neap cycle, which sets how hard the water moves — not a tide table: no free source publishes high and low water for Southeast Asian reefs, and the range peaks a day or two after the moon does, by an amount that varies with the coast. For times on the day, ask the operator.

Getting there

~5h 51m

door to water, each way · 3 legs

FlightKoh Samui (USM)~3h 51mFlight time plus the airports at both ends. A connection adds to it.Find flights →
FerryKoh Tao1h 30mThe Lomprayah catamaran, about 90 minutes, several a day.
Dive boatSail Rock30 minChumphon Pinnacle and the rest are 20 to 45 minutes off the island.

📍 Sail Rock on Google Maps 🧭 Route from Koh Samui

Times marked ~ are estimated from straight-line distance and will be roughly right at best. The road legs are the ones Google Maps answers properly; it will not plan the ferry or the dive boat at all. A dive site's coordinates put a pin in open water, so the map link drops you on the site, not on a jetty.

Details

Max depth: 35 m
Entry: boat
Type: reef
Island: Sail Rock
Country: Thailand
Marks: 9°56.700'N 99°59.423'E
Position: 9.9450, 99.9904
Local name: หินใบ

Where it is

Loading the map…

Nearby

Sightings and photographs from iNaturalist contributors, research-grade records within 6km, under Creative Commons licences. Counts are what divers and snorkellers have bothered to log — a common fish with few records is common all the same.