DivePlnr
    U 104 dive site
    wreck
    59m
    South Coast, Ireland
    Saltee Islands SPA

    U 104

    Good diving all year

    Protected Area

    Saltee Islands SPA

    Why dive here

    With 185+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - U 104 offers some of South Coast's richest wreck diving. Water ranges 9-15°C, warmest July, August, September.

    Best timeYear-round
    WetsuitA drysuit
    Marine lifeBlue Sharks, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 185+ species recorded
    Water9-15°C · warmest July, August, September
    CharacterWreck dive · max 59m
    StandoutExceptional marine biodiversity

    Diving the U 104 off Ireland's South Coast is a deep dive, pushing nearly 60 metres, so it’s one for the experienced tech divers among us. This WWI German submarine met its end in 1918, rammed and depth-charged by HMS Jessamine. Today, she lies remarkably intact for her age, offering a tangible link to a bygone era. We’ve found her colonised by all the usual suspects, conger eels peeking from every opening, and squat lobsters tucked into crevices. It’s a serious wreck, demanding respect, but it rewards with a genuine sense of history and some quality deeper dwelling marine encounters.

    Typical U 104 Dive Profile

    15m30m45m60mSafety Stop0m59m max~15 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

    Maximum depth 59m exceeds recreational limits (40m). Technical diving certification and equipment required.

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

    Cold water this month (avg 14°C). Drysuit or thick wetsuit (7mm+) recommended.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:4417:4310h 59m daylightGolden hour 16:57

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    Conditions

    Ocean conditions, forecast and tides for U 104

    U 104 Ocean Conditions

    Monthly averages for U 104, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (51.71, -8.38) (9km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    14°C

    57°F · Range: 12.3–14.8°C

    Air Temperature

    12°C

    54°F

    Wind Speed

    7.84 m/s

    15.2 knots

    Atmospheric Pressure

    1008.6 hPa

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

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