DivePlnr
    Desconocida Reef dive site
    reef
    10-25m
    Alaska, United States

    Desconocida Reef

    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 - Desconocida Reef offers some of Alaska's richest reef 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
    CharacterReef dive · max 10-25m
    StandoutRich in charismatic marine life

    Desconocida Reef in Alaska delivers a rugged cold-water dive. You'll drop into a landscape of impressive rock formations, where large sea stars cling to the walls and anemones sway gently in the chill. This site is best for experienced drysuit divers keen on exploring the unique, raw beauty of Alaska's underwater environment. Expect a genuine wilderness feel, often with strong currents.

    Typical Desconocida Reef 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.

    Today06:1517:0810h 53m daylightGolden hour 16:17

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    Conditions

    Ocean conditions, forecast and tides for Desconocida Reef

    Desconocida Reef Ocean Conditions

    Monthly averages for Desconocida Reef, 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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