ONA DELTA
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.
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
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.
Nearest Dive Centres to ONA DELTA
Dive shops near ONA DELTA
BUCEO YAMANA
Argentina YMCA
CENTRO BUCEO SUR
La Casa del Buceador
Mermaid World
AM DIVE
Reviews for ONA DELTA
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)
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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