DivePlnr
    Thumb Rock dive site
    pinnacle
    10-25m
    West Coast, Ireland
    Bunduff Lough and Machair/Trawalua/Mullaghmore SAC

    Thumb Rock

    Best months: Jul–Aug

    Protected Area

    Bunduff Lough and Machair/Trawalua/Mullaghmore SAC

    Why dive here

    With 169+ marine species recorded in the area - including dolphins, dwarf minke whales, humpback whales, ocean sunfish (mola mola) and octopuses - Thumb Rock offers some of West Coast's richest pinnacle diving. Water ranges 8-17°C, warmest July, August, September.

    Best timeJul–Aug
    WetsuitA 5mm wetsuit
    Marine lifeDolphins, Dwarf Minke Whales, Humpback Whales, Ocean Sunfish (Mola Mola) and Octopuses · 169+ species recorded
    Water8-17°C · warmest July, August, September
    CharacterPinnacle dive · max 10-25m
    StandoutExceptional marine biodiversity

    Thumb Rock, tucked away on Ireland's west coast, offers a straightforward dive among rocky crevices and kelp beds. It's a solid choice for a calm day when you're looking for a relaxed exploration rather than a thrill. Expect to spot plenty of crabs, lobsters, and blennies peeking out from under the rocks. This site is ideal for less experienced divers or those looking for a chilled-out second dive.

    Typical Thumb 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 14°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today05:5516:4810h 53m daylightGolden hour 15:59

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    Conditions

    Ocean conditions, forecast and tides for Thumb Rock

    Thumb Rock Ocean Conditions

    Monthly averages for Thumb Rock, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (53.32, -9.66) (22km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    14°C

    56°F · Range: 11.7–15.4°C

    Air Temperature

    12°C

    54°F

    Wind Speed

    8.2 m/s

    15.9 knots

    Atmospheric Pressure

    1007.4 hPa

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

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