20m
    Intermediate
    Similan Islands, Thailand
    Khao Lampi- Hat Thai Mueang

    Premchai Wreck

    Best months: Jan–May

    Protected Area

    Khao Lampi- Hat Thai Mueang

    Why dive here

    With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Premchai Wreck offers some of Similan Islands's richest wreck diving. Water ranges 29-31°C, warmest April, May, June.

    Best timeJan–May
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBlacktip Reef Sharks, Eagle Rays, Giant Moray Eels, Whale Sharks and Clownfish · 173+ species recorded
    Water29-31°C · warmest April, May, June
    CharacterWreck dive · max 20m
    StandoutExceptional marine biodiversity

    The Premchai Wreck is one of those sites we always make time for on the way back to Tap Lamu. It’s not the deepest wreck out there, topping out around 20 metres, but it offers a solid intermediate dive. This old tin dredger, which went down in 2001, lies mostly upside down, and that unique orientation gives it a real character. We love poking around the darker spaces. You'll spend your dive exploring the hull, now encrusted with hard corals and big clams. We’ve spotted honeycomb morays tucked away in crevices, their patterns distinct against the metal. It’s a site that feels lived in, too; schools of fusiliers often mill above the deck, shimmering in the shafting light. The Premchai is a perfect dive for those who appreciate the history of a wreck, combined with a good chance of finding some interesting macro life without pushing deep limits. It’s a rewarding dive, especially as a last hurrah before heading back to shore.

    Typical Premchai Wreck Dive Profile

    10m20mSafety Stop0m20m 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 20m - 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.

    Today06:1518:1411h 59m daylightGolden hour 17:46

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    Conditions

    Ocean conditions, forecast and tides for Premchai Wreck

    Premchai Wreck Ocean Conditions

    Monthly averages for Premchai Wreck, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (8.1, 98.3) (6km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    85°F · Range: 28.7–30.4°C

    Current Speed

    5.1 cm/s

    Direction: S (191.3°)

    Salinity

    29.75 PSU

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

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