32m
    Southern Islands, Singapore
    Labrador Nature Reserve

    HULU MAS (?TIRTA MAS)

    Best months: Jan–Mar

    Protected Area

    Labrador Nature Reserve

    Why dive here

    With 263+ marine species recorded in the area - including blue-spotted stingrays, dugongs, giant moray eels, seahorses and sea turtles - HULU MAS (?TIRTA MAS) offers some of Southern Islands's richest wreck diving. Water ranges 28-31°C, warmest May, June, November.

    Best timeJan–Mar
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBlue-Spotted Stingrays, Dugongs, Giant Moray Eels, Seahorses and Sea Turtles · 263+ species recorded
    Water28-31°C · warmest May, June, November
    CharacterWreck dive · max 32m
    StandoutExceptional marine biodiversity

    Alright, let's talk about the Hulu Mas. We know, Singapore isn't often on the wreck diver's radar, but this one's a real treat if you catch it right. Sunk in 2003, this 105-meter carrier lies upright on the seabed at 32 meters, making it a proper deep dive. The sheer scale of the Hulu Mas is what really grabs you. We love dropping down onto the huge deck, seeing the structure stretch out into the murk. Visibility here can be tricky, swinging from a decent 10 meters to a soupy 3, so pick your day carefully, ideally on a neap tide. But even in lower vis, the wreck’s presence is commanding. Look for schooling fusiliers, often so dense they form shimmering curtains around the mast and bridge. Inside, if you're qualified and careful, the cargo holds offer some cool penetration, just remember it’s silty. We've seen some impressive groupers lurking in the shadows and nudibranchs grazing on the encrusted railings. It's a challenging dive, best suited for experienced wreck divers comfortable with depth and variable conditions.

    Typical HULU MAS (?TIRTA MAS) Dive Profile

    15m30mSafety Stop0m32m 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 (32m) - 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.

    Today05:5117:5712h 6m daylightGolden hour 17:29

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    Conditions

    Ocean conditions, forecast and tides for HULU MAS (?TIRTA MAS)

    HULU MAS (?TIRTA MAS) Ocean Conditions

    Monthly averages for HULU MAS (?TIRTA MAS), sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (1.18, 103.96) (8km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    86°F · Range: 29.5–31.1°C

    Air Temperature

    27°C

    81°F

    Wind Speed

    4.07 m/s

    7.9 knots

    Atmospheric Pressure

    1009.8 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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