10-30m
    Hawaii, United States
    Offshore Island, Pu'upehe

    Cathedrals

    Best months: Jan–Dec

    Protected Area

    Offshore Island, Pu'upehe

    Why dive here

    Cathedrals is a cave dive where divers can encounter blue sharks, sea turtles and sperm whales. Water ranges 26-29°C, warmest August, September, October.

    Marine lifeBlue Sharks, Sea Turtles and Sperm Whales
    Water26-29°C · warmest August, September, October
    CharacterCave dive · max 10-30m
    StandoutDramatic cave topography

    The Cathedrals in Lanai offer a unique cave diving experience, renowned for its two large lava tubes. Sunlight streams through cracks in the ceiling, creating an almost stained-glass effect. We often find turtles resting inside and schools of fish darting in and out. This site is best for experienced divers comfortable with overhead environments.

    Typical Cathedrals Dive Profile

    5m10mSafety Stop0m10m max~60 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

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

    Today06:1018:5212h 42m daylightGolden hour 18:22

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    Conditions

    Ocean conditions, forecast and tides for Cathedrals

    Cathedrals Ocean Conditions

    Monthly averages for Cathedrals, sourced from Copernicus Marine satellite data

    August Averages

    Sea Temperature

    28.48°C

    83°F

    Current Speed

    7.28 cm/s

    Direction: N (344.1°)

    Chlorophyll-a

    0.037 mg/m³

    Very clear (oligotrophic)

    Salinity

    34.85 PSU

    Data sources: Copernicus Marine Service (EU)

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