DivePlnr
    Denny Rock dive site
    pinnacle
    10-30m
    Alaska, United States

    Denny 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 - Denny 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

    Denny Rock in Alaska is a solid choice for those seeking a cooler water dive with a bit of a wild edge. Below the surface, the rock walls give way to a silty bottom, where we often spot big skates resting. Keep an eye out for the colourful sunflower stars clinging to the rocks and the occasional Pacific glass shrimp darting past. If you’re a fan of unique finds and don't mind a bit of a chill, this site offers a different kind of Alaskan beauty, away from the typical reef dives.

    Typical Denny 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.

    Today05:4716:5111h 3m daylightGolden hour 16:06

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    Conditions

    Ocean conditions, forecast and tides for Denny Rock

    Denny Rock Ocean Conditions

    Monthly averages for Denny 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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