40m
    Vava'u Group, Tonga
    'Utungake SMA

    GLEN MACWILLIAM

    Best months: Jan–Dec

    Protected Area

    'Utungake SMA

    Why dive here

    With 312+ marine species recorded in the area - including barracuda, giant moray eels, humpback whales, sperm whales and whitetip reef sharks - GLEN MACWILLIAM offers some of Vava'u Group's richest wreck diving. Water sits around 28°C.

    Marine lifeBarracuda, Giant Moray Eels, Humpback Whales, Sperm Whales and Whitetip Reef Sharks · 312+ species recorded
    Water28°C · warmest January, February, March
    CharacterWreck dive · max 40m
    StandoutExceptional marine biodiversity

    We love a good wreck, and the Glen MacWilliam is a corker, especially if you’re into a bit of history with your dive. She’s a decent sized steamship, 115 metres long, sunk after a copra fire back in the day, though we hear the chromium ore cargo she was carrying is worth a fortune now. The wreck sits at 40 metres, making it a dive for those comfortable with deeper profiles. Descending onto the Glen MacWilliam, you really get a sense of her scale. The bow comes into view first, then the huge superstructure looming out of the blue. You can spend a good chunk of your bottom time just circumnavigating her, marvelling at how completely the reef has taken hold. Schools of fusiliers swirl around the mast, so thick they occasionally block the light, and we've spotted resident trevally patrolling the decks. The cargo holds are open, offering some intriguing swim-throughs, but watch your buoyancy – it’s easy to stir up the silt. We'd suggest going early in the morning for the best visibility and fewer other divers. This site is a proper deep wreck dive, great for experienced divers who appreciate history and don’t mind a bit of a current sometimes.

    Typical GLEN MACWILLIAM Dive Profile

    15m30m45mSafety Stop0m40m 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 (40m) - 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.

    Today05:5217:2811h 36m daylightGolden hour 16:58

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    Conditions

    Ocean conditions, forecast and tides for GLEN MACWILLIAM

    GLEN MACWILLIAM Ocean Conditions

    Monthly averages for GLEN MACWILLIAM, sourced from NOAA buoy data - nearest station: Open-Meteo grid (-18.65, -174.02) (0km away)

    August Averages

    Sea Temperature

    27.79°C

    82°F

    Air Temperature

    24.02°C

    75°F

    Wind Speed

    9.27 m/s

    18.0 knots

    Atmospheric Pressure

    1015.7 hPa

    Based on 5 years of monitoring data · Data sources: NOAA NDBC

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