4m
    Mar del Plata, Argentina

    ONA DELTA

    Best months: Jan–Mar

    Why dive here

    With 33+ marine species recorded in the area - including sperm whales - ONA DELTA offers some of Mar del Plata's richest wreck diving. Water ranges 10-21°C, warmest January, February, March.

    Best timeJan–Mar
    WetsuitA 5mm wetsuit
    Marine lifeSperm Whales · 33+ species recorded
    Water10-21°C · warmest January, February, March
    CharacterWreck dive · max 4m

    ONA DELTA is one of those sites that just feels… different. It’s a shallow wreck, only 4 metres deep, but don't let that fool you into thinking it's boring. We love the sheer character of the place. The ONA DELTA, a fishing vessel, ran aground back in 1961, and what’s left of her is now a tangled, rusted skeleton draped in kelp and alive with small fish. You’re not getting vast schools here, but rather a constant parade of individual characters – blennies poking out of crevices, small crabs scuttling over plates of rust, and the occasional cuttlefish lurking in the shadows. Our favourite thing to do is just drift slowly over the remains, watching the light play through the kelp forest that has grown up around the stern. It's surprisingly atmospheric, especially on a calm day when the visibility stretches out. We'd suggest going early in the morning before the wind picks up; it really helps with the visibility and the overall serenity. This site is perfect for photographers who appreciate the details and for divers who enjoy a bit of history mixed with their marine life, all without the need for deep technical skills. Just be mindful of the exposed metal; it’s an old wreck, so watch your buoyancy and keep a respectful distance from anything that looks like it might snag a hose.

    Typical ONA DELTA Dive Profile

    5mSafety Stop0m4m 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

    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.

    Today05:1818:0312h 45m daylightGolden hour 17:30

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    Conditions

    Ocean conditions, forecast and tides for ONA DELTA

    ONA DELTA Ocean Conditions

    Monthly averages for ONA DELTA, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-38.05, -57.5) (0km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    14°C

    56°F · Range: 11.1–16.9°C

    Current Speed

    2.83 cm/s

    Direction: SE (135°)

    Salinity

    0 PSU

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

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