10-30m
    Alaska, United States

    Kogangas Rock

    Good diving all year

    Why dive here

    With 58+ marine species recorded in the area - including blue sharks, blue whales, humpback whales, orcas and seals & sea lions - Kogangas Rock offers some of Alaska's richest pinnacle diving. Water ranges 5-15°C, warmest July, August, September.

    Best timeYear-round
    WetsuitA drysuit
    Marine lifeBlue Sharks, Blue Whales, Humpback Whales, Orcas and Seals & Sea Lions · 58+ species recorded
    Water5-15°C · warmest July, August, September
    CharacterPinnacle dive · max 10-30m
    StandoutRich in charismatic marine life

    Kogangas Rock isn't for the faint of heart, or for those who skimp on drysuit insulation. This is Alaska diving, raw and exhilarating. We love the sheer drama of the place, where kelp forests sway in the currents like ancient trees, and the rock itself plunges into the gloom. Visibility can be hit or miss, but on a good day, when the sun penetrates the surface, it’s a genuinely spectacular sight. You’ll encounter a very different cast of characters here compared to warmer climes. Giant octopuses are the real stars, often found tucked into rocky crevices, their intelligent eyes watching you. We’ve also had incredible encounters with playful sea lions zipping through the kelp. Keep an eye out for the vibrant red soft corals contrasting against the dark rock, and the odd Spotted Ratfish gliding past. This site is definitely best suited for experienced cold-water divers who appreciate the wild side of diving and don't mind a bit of a current.

    Typical Kogangas Rock 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

    Cold water this month (avg 11°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today06:0417:0411h 0m daylightGolden hour 16:17

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    Conditions

    Ocean conditions, forecast and tides for Kogangas Rock

    Kogangas Rock Ocean Conditions

    Monthly averages for Kogangas Rock, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (57, -135.4) (0km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    11°C

    51°F · Range: 8.5–12.8°C

    Air Temperature

    8°C

    47°F

    Wind Speed

    6.44 m/s

    12.5 knots

    Atmospheric Pressure

    1007.9 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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