DivePlnr
    Haleiwa Trench dive site
    channel
    15-30m
    Hawaii, United States
    Pupukea Marine Life Conservation District

    Haleiwa Trench

    Best months: Jul–Sep

    Protected Area

    Pupukea Marine Life Conservation District

    Why dive here

    Haleiwa Trench is a channel dive where divers can encounter blue sharks, sea turtles and sperm whales. Water ranges 25-28°C, warmest August, September, October.

    Best timeJul–Sep
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBlue Sharks, Sea Turtles and Sperm Whales
    Water25-28°C · warmest August, September, October
    CharacterChannel dive · max 15-30m

    The Haleiwa Trench offers a straightforward dive, often used by local operators for check-out dives or when conditions offshore are choppy. You'll generally find a sloping sandy bottom leading to a gradual drop-off. Keep an eye out for green sea turtles resting on the sand or patrolling the reef edge, and we've spotted white-tip reef sharks cruising through the trench itself. It's a reliable spot for beginners or those looking for an easy, calm dive.

    Typical Haleiwa Trench 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

    Channel dive - currents can be strong and change direction. Dive at slack tide when possible.

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

    Today05:2717:1311h 46m daylightGolden hour 16:43

    Nearest Dive Centres to Haleiwa Trench

    Dive shops near Haleiwa Trench

    Hawaii Eco Divers

    911m away
    Web
    Courses

    Underwater Oahu, LLC

    18km away
    Web
    Phone

    Affinity Freediving

    30km away
    Web
    Phone

    Dive Oahu - Navy Exchange

    31km away
    Web
    Courses

    The Hawaiian Dive Company

    37km away
    Web
    Phone
    Courses

    Hawaiian Diving Adventures

    39km away
    Web
    Courses
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    Conditions

    Ocean conditions, forecast and tides for Haleiwa Trench

    Haleiwa Trench Ocean Conditions

    Monthly averages for Haleiwa Trench, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (20.73, -156.95) (9km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    27°C

    81°F · Range: 26.7–28.4°C

    Current Speed

    11.31 cm/s

    Direction: NW (315°)

    Chlorophyll-a

    0.035 mg/m³

    Very clear (oligotrophic)

    Salinity

    35.58 PSU

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

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