advanced
    (75)

    Strangford Lough Narrows (The Dorn)

    30m Max
    6-14m Vis
    boat

    Site Overview

    The Strangford Narrows, including the Dorn, host one of the world’s strongest tidal races, but at slack water divers drop into deep channels walled with dead-men’s fingers, plumose anemones, massive spider crabs and scallops. The biodiversity is outstanding and the timing is everything, making this a bucket-list site for advanced divers who love tidal-flow diving. Strict planning and a local guide are essential. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers.

    Dive Briefing

    "Brief on the exact slack window, shotline and a strict turn time. Descend quickly to the channel wall, control buoyancy against the current, and photograph the anemone gardens. Ascend the line the moment slack ends, with a safety stop, and deploy the DSMB. Never drift with the race. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point."

    Signature Marine Life

    Plumose Anemone

    high

    Metridium senile

    Best: Year-round

    Dead-man’s Fingers

    high

    Alcyonium digitatum

    Best: Year-round

    Spider Crab

    high

    Maja squinado

    Best: Year-round

    Scallop

    high

    Pecten maximus

    Best: Year-round

    Lobster

    medium

    Homarus gammarus

    Best: Year-round

    Safety & Hazards

    • Extreme tidal current
    • Short slack window
    • Cold water
    • Deep channel
    • Entanglement
    • Remote location
    Nearest Chamber
    Belfast City Hospital Hyperbaric
    40km away

    Traveler Notes

    Who is this for?

    For advanced divers with strong buoyancy and tidal-dive experience, comfortable with a guide-led, time-critical drift. Not for recreational beginners. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance.

    drift
    channel
    macro
    advanced
    tidal

    Quick Stats

    Difficultyadvanced
    CertificationAdvanced Open Water
    Currentvery strong
    Water Temp9-15°C
    Best TimeMay - September

    Dive Logistics

    Operators
    • Strangford Dive
    • Lough Diving
    Pricing Guide
    $110 - $190
    Per 2-tank boat dive

    Photography Info

    Recommended Gear
    60mm
    16-35mm

    Best for: macro, wide_angle

    Nearby Stay

    Culloden Estate & Spa

    Holywood10km away

    Check Availability

    Portaferry Hotel

    Portaferry2km away

    Check Availability