DivePlnr
    Blue Hole dive site
    cave
    27m
    Intermediate
    Apo Reef, Philippines

    Blue Hole

    Best months: Oct–Feb

    Why dive here

    With 176+ marine species recorded in the area - including giant moray eels, sea turtles, sperm whales, lionfish and pufferfish - Blue Hole offers some of Apo Reef's richest cave diving. Water ranges 28-30°C, warmest May, June, July.

    Best timeOct–Feb
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeGiant Moray Eels, Sea Turtles, Sperm Whales, Lionfish and Pufferfish · 176+ species recorded
    Water28-30°C · warmest May, June, July
    CharacterCave dive · max 27m
    StandoutExceptional marine biodiversity

    Dropping into Apo Reef’s Blue Hole, you’re looking at a large opening that funnels down to about 27 meters. Inside, the light plays tricks, making it a dramatic, if straightforward, cave dive. We've seen various reef fish around the entrance and occasionally a pelagic passing by in the deeper blue. It’s an intermediate dive, good for those who want a taste of overhead environments without anything too technical.

    Typical Blue Hole Dive Profile

    10m20m30mSafety Stop0m27m 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 27m - Advanced Open Water certification recommended.

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

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

    Today05:4217:3611h 55m daylightGolden hour 17:08

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    Conditions

    Ocean conditions, forecast and tides for Blue Hole

    Blue Hole Ocean Conditions

    Monthly averages for Blue Hole, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (12.33, 121.06) (26km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    86°F · Range: 28.1–31.3°C

    Current Speed

    3.16 cm/s

    Direction: E (108.4°)

    Chlorophyll-a

    0.049 mg/m³

    Very clear (oligotrophic)

    Salinity

    32.63 PSU

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

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