HTMS Kut

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What you'll see (20)

Copperband ButterflyfishChelmon rostratusseen 4× near here

Black Longspine UrchinDiadema setosumseen 4× near here

Java RabbitfishSiganus javusseen 3× near here

Starry PufferArothron stellatusseen 3× near here

Pharaoh CuttlefishAcanthosepion pharaonisseen 3× near here

Scissortail SergeantAbudefduf sexfasciatusseen 2× near here

Pastel-green WrasseHalichoeres chloropterusseen 2× near here

Queensland SeahorseHippocampus spinosissimusseen 2× near here

Crescent GrunterTerapon jarbuaseen 2× near here

Rainbow Monocle BreamScolopsis monogrammaseen 2× near here

Red SquirrelfishSargocentron rubrumseen 2× near here

Ornate SandgobyIstigobius ornatusseen 2× near here

Hawksbill Sea TurtleEretmochelys imbricataseen 1× near here

Goose BarnacleLepas anseriferaseen 1× near here

Indo-Pacific Sergeant MajorAbudefduf vaigiensisseen 1× near here

Bluelined RockcodCephalopholis formosaseen 1× near here

Snake Sea CucumberSynapta maculataseen 1× near here

Leopard ConeConus leopardusseen 1× near here

Herring ScadAlepes variseen 1× near here

Ocellate ButterflyfishParachaetodon ocellatusseen 1× near here

Planning a trip

4–6 days

worth going for

Flight, then a boat or domestic hop.

1,332km from Singapore — about 12h each way, so two of those days are travel. 2 dive sites within 25km.

When people dive it

Busiest May, Jun, Jul, Aug, Sep, Oct.

From 569 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

~6h 57m

door to water, each way · 4 legs

FlightBangkok (BKK)~4h 24mFlight time plus the airports at both ends. A connection adds to it.Find flights →
Transferthe jetty~33 minRoad transfer to the coast, usually arranged by the resort or liveaboard.Directions →
Ferrythe crossing~1h 30mAt this distance the last stretch is a scheduled crossing rather than a dive boat, so book it before the flight — a missed sailing usually costs a day. Which crossing it is has been worked out from the distance and not from a timetable; ask the operator.
Dive boatHTMS Kut~30 minThen the dive boat out from the island.

📍 HTMS Kut on Google Maps 🧭 Route from Bangkok

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: 31 m
Island: Ko Lan
Country: Thailand
Marks: 12°57.001'N 100°47.933'E
Position: 12.9500, 100.7989

Site website →

Where it is

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Nearby

HTMS Khram12km

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.