33m
    Similan Islands, Thailand
    Khao Lak - Lam Ru

    SEA CHART 1

    Best months: Jan–May

    Protected Area

    Khao Lak - Lam Ru

    Why dive here

    With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - SEA CHART 1 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 33m
    StandoutExceptional marine biodiversity

    Sea Chart 1, resting upright at 33 metres, is a merchant vessel that found its final resting place in the Similans. We find it a bit of a moody dive, often with a slight chill in the water around the wreck itself. It’s been down there long enough now that nature has really started to reclaim it, with schools of snappers and barracuda using the hull for shelter. You can spend a good chunk of bottom time exploring the deck and superstructure, watching for lionfish tucked into crevices. This one is best for those comfortable with deeper dives and a current that can sometimes pick up a bit.

    Typical SEA CHART 1 Dive Profile

    15m30mSafety Stop0m33m max~20 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

    Deep dive (33m) - monitor air consumption closely. Advanced 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.

    Today06:1618:1411h 58m daylightGolden hour 17:46

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    Conditions

    Ocean conditions, forecast and tides for SEA CHART 1

    SEA CHART 1 Ocean Conditions

    Monthly averages for SEA CHART 1, 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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