15-40m
    Coral Sea, Australia

    Holmes Reef

    Best months: Mar–Jul

    Why dive here

    With 113+ marine species recorded in the area - including dugongs, grey reef sharks, humpback whales, sea turtles and tiger sharks - Holmes Reef offers some of Coral Sea's richest reef diving. Water ranges 25-30°C, warmest January, February, March.

    Best timeMar–Jul
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeDugongs, Grey Reef Sharks, Humpback Whales, Sea Turtles and Tiger Sharks · 113+ species recorded
    Water25-30°C · warmest January, February, March
    CharacterReef dive · max 15-40m
    StandoutRich in charismatic marine life

    Holmes Reef isn't just another Coral Sea site; it’s an open-ocean adrenaline shot. We love the feeling of being truly out there, hundreds of kilometres from the coast, with nothing but deep blue below. The visibility here isn't just good, it's often ridiculous – we've had days where we could see the anchor chain disappear into a hazy 60-metre distance. This place is all about the pelagics. We’re talking silvertip sharks cruising the walls, occasionally a hammerhead ghosting by if you’re lucky and the thermocline is right. Keep an eye out for black marlin and swordfish in the blue; they’re not a daily guarantee but are a real possibility. The walls themselves are impressive, often dropping beyond 40 metres, plastered with staghorn coral that seems to glow in the clear water. It’s definitely a site for experienced divers comfortable with deep water and potentially strong currents, but the rewards are huge. Drop into the blue and the world feels impossibly vast, a true taste of the open ocean. You’ll spend most of your dive watching the drop-off for those big, shadowy shapes – a school of blackspot surgeonfish hugging the current, a curious bicolor cleaner wrasse investigating your mask, or a bold silvertip making a close pass. This is a site for divers who crave raw, untamed marine encounters and thrive on the unpredictable nature of the deep.

    Typical Holmes Reef Dive Profile

    5m10m15mSafety Stop0m15m max~50 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

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

    Today05:4418:0712h 23m daylightGolden hour 17:38

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    Conditions

    Ocean conditions, forecast and tides for Holmes Reef

    Holmes Reef Ocean Conditions

    Monthly averages for Holmes Reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-16.5, 148) (0km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    26°C

    79°F · Range: 25.4–29°C

    Current Speed

    10.3 cm/s

    Direction: SE (119.1°)

    Salinity

    35.38 PSU

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

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