DivePlnr
    NO. 1 dive site
    wreck
    21m
    Koh Tao, Thailand
    Chonburi Environmental Protected Area

    NO. 1

    Best months: Oct–Feb

    Protected Area

    Chonburi Environmental Protected Area

    Why dive here

    With 54+ marine species recorded in the area - including sea turtles, tiger sharks and pufferfish - NO. 1 offers some of Koh Tao's richest wreck diving. Water ranges 29-31°C, warmest April, May, June.

    Best timeOct–Feb
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeSea Turtles, Tiger Sharks and Pufferfish · 54+ species recorded
    Water29-31°C · warmest April, May, June
    CharacterWreck dive · max 21m

    The NO. 1 wreck off Koh Tao is a torpedo boat, now a deliberate hazard for unwary skippers and a cool dive for us. She sits upright at 21 meters, a steel skeleton draped in fishing nets and growth. We usually find schools of yellowtail barracuda circling the bow, and often see some grumpy stonefish tucked into crevices. It’s an easy wreck to navigate, great for those new to penetration diving, with open hatches leading into accessible holds. Just watch for the current, it can pick up here, making for a swift drift around the old girl.

    Typical NO. 1 Dive Profile

    10m20mSafety Stop0m21m max~30 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Depth of 21m - Advanced Open Water certification recommended.

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:0718:0111h 55m daylightGolden hour 17:33

    Nearest Dive Centres to NO. 1

    Dive shops near NO. 1

    NODC Sattahip Dive

    8km away
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    BBK Dive Sattahip

    9km away
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    INDY FREEDIVE

    11km away
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    Super Dive Thailand

    12km away
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    Courses

    Happydive.net

    13km away
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    Real Divers

    28km away
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    View all dive centres in Koh Tao

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    Conditions

    Ocean conditions, forecast and tides for NO. 1

    NO. 1 Ocean Conditions

    Monthly averages for NO. 1, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (11.17, 101.33) (40km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    86°F · Range: 29.1–31.1°C

    Current Speed

    7.07 cm/s

    Direction: E (98.1°)

    Salinity

    31.67 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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