Caribbean Coast, Costa Rica
    Marino las Baulas de Guanacaste

    Roca Sucia, Dirty Rock

    Good diving all year

    Protected Area

    Marino las Baulas de Guanacaste

    Why dive here

    With 217+ marine species recorded in the area - including dolphins, humpback whales, orcas, sea turtles and pufferfish - Roca Sucia, Dirty Rock offers some of Caribbean Coast's richest reef diving. Water ranges 29-31°C, warmest March, April, May.

    Best timeYear-round
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeDolphins, Humpback Whales, Orcas, Sea Turtles and Pufferfish · 217+ species recorded
    Water29-31°C · warmest March, April, May
    CharacterReef dive
    StandoutExceptional marine biodiversity

    Roca Sucia, or Dirty Rock, is one of those places that, despite its name, really delivers. We love the way this pinnacle rises from the seabed, creating a real magnet for fish. Drop in, and you’re immediately surrounded, particularly on the east side where the barber fish and king angels become your eager escorts – a genuinely fun experience as they zip around you, almost like they're posing for photos. Visibility here averages around 10 meters, so it’s not always gin-clear, but that’s part of its charm. It lends a slightly dramatic, atmospheric feel to the rock formations. We’ve had some fantastic encounters with schools of pompano flashing silver in the distance and spotted sneaky needle-tooth morays tucked into crevices. Keep an eye out for the smaller stuff too; the blennies and gobies are everywhere if you take a moment to look. Currents can be strong, especially deeper, so this site is definitely best for more experienced divers who are comfortable moving with a bit of push. It's a dive that rewards attentive eyes and a willingness to explore the nooks and crannies of a truly active rock reef.

    Today05:3317:2911h 57m daylightGolden hour 17:01

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    Conditions

    Ocean conditions, forecast and tides for Roca Sucia, Dirty Rock

    Roca Sucia, Dirty Rock Ocean Conditions

    Monthly averages for Roca Sucia, Dirty Rock, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (9.78, -84.89) (48km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    29°C

    85°F · Range: 27.9–31.1°C

    Current Speed

    5 cm/s

    Direction: N (0°)

    Chlorophyll-a

    0.142 mg/m³

    Clear water

    Salinity

    28.81 PSU

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

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