Scapa Flow, Orkney, United Kingdom
    Bullers of Buchan Coast

    Wreck of Mercator

    Good diving all year

    Protected Area

    Bullers of Buchan Coast

    Why dive here

    With 140+ marine species recorded in the area - including blue whales, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - Wreck of Mercator offers some of Scapa Flow, Orkney's richest wreck diving. Water ranges 8-14°C, warmest July, August, September.

    Best timeYear-round
    WetsuitA drysuit
    Marine lifeBlue Whales, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 140+ species recorded
    Water8-14°C · warmest July, August, September
    CharacterWreck dive
    StandoutRich in charismatic marine life

    The Mercator is pure Scapa Flow character, a trawler sitting upright on a sandy bottom, broken but still whole enough to give you a real sense of its past life. We love how the deck machinery is still so identifiable, the winches and davits almost ready for another day’s fishing. Swim through the holds, which are surprisingly open and easy to navigate even for less experienced wreck divers, or peek into the superstructure. It's a fantastic training ground for getting comfortable inside overhead environments. Look for the resident pollack and cod darting in and out of the shadows, and we often find various colourful anemones clinging to the plates, a nice splash of colour against the rusted steel. The visibility here can be decent, especially on a settled day. We’d suggest a dive with a good torch; it really brings out the textures and the life tucked into every corner. Mercator offers a classic Scapa dive without the depths or currents of some of the bigger blockships, making it a great option for a second dive or for newer wreck enthusiasts.

    Safety Notes

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Cold water this month (avg 13°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today06:3117:1610h 45m daylightGolden hour 16:23

    Reviews for Wreck of Mercator

    Sign in to write a review

    Conditions

    Ocean conditions, forecast and tides for Wreck of Mercator

    Wreck of Mercator Ocean Conditions

    Monthly averages for Wreck of Mercator, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (58.64, -3.16) (8km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    13°C

    55°F · Range: 11.4–13.8°C

    Air Temperature

    10°C

    50°F

    Wind Speed

    9.26 m/s

    18.0 knots

    Atmospheric Pressure

    1005.3 hPa

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

    Plan & book

    Ways to dive Scapa Flow, Orkney, from day trips to liveaboards.

    Day trips & courses

    via GetYourGuide

    Guided dives, courses and snorkel trips with instant booking.

    Find dive trips in Scapa Flow, Orkney

    Places to stay

    via Booking.com

    Hotels and dive resorts near Scapa Flow, Orkney.

    Search stays in Scapa Flow, Orkney

    Dive insurance

    Most travel insurance excludes or limits scuba. Check what you need before you go.

    Dive insurance explained

    Partner links: we may earn a commission if you book, at no extra cost to you. How we make money

    Where to Stay near Wreck of Mercator

    Prices from Booking.com. We may earn a commission at no extra cost to you.

    Back to Scapa Flow, Orkney