Blanca Rosita - Mar del Plata

Blanca Rosita isn’t a deep dive, sitting shallow at just seven metres, but it offers a genuinely engaging experience for anyone keen on history and macro life. We love how accessible this wreck is, perfect for an afternoon’s exploration without needing extensive bottom time. Sunk back in October 1926, she’s a century-old steel skeleton, well broken up but still very much a wreck, not just a pile of debris. You’ll spend your dive poking around twisted metal plates and rusted beams, feeling the slight surge against you as you peek into tight crevices. This is prime territory for small stuff; think blennies peeking out of holes, nudibranchs crawling along encrusted surfaces, and often some decent-sized crabs scuttling away as you approach. We’d suggest going during a slack tide if you can, as the visibility can improve dramatically, letting you appreciate the wreck’s full outline without fighting the current. Blanca Rosita is our pick for a relaxing, historical dive that rewards a slow, observant pace.

Location
Mar del Plata, Argentina, South America
Coordinates
-33.640003, -59.539290
Type
wreck
Maximum Depth
7m

Wreck History - Blanca Rosita

Year Sunk
1926
Vessel Type
fishing vessel
Cause
unknown

The story of the Blanca Rosita, which sank off the coast of Mar del Plata on October 24, 1926, is shrouded in mystery. While the date of its loss is recorded, the cause remains unknown, leaving its final moments to the imagination. Given its location in one of Argentina's busiest fishing ports and its name, it was likely a local fishing vessel or small coastal trader that met an unfortunate end. Today, it lies in just 7 metres of water, making it one of the most accessible wreck sites in the area.

Its shallow depth and proximity to shore make the Blanca Rosita an ideal dive for beginners, photographers, and those looking for a relaxed second dive of the day. The classification as a "dangerous wreck" hints that the structure is broken, with sharp edges and scattered debris that now provide a perfect habitat for a variety of local marine life. Exploring the remains of this 1920s-era vessel offers a unique glimpse into the region's maritime past, even if its complete story has been claimed by the sea.

Best Time to Dive in Mar del Plata

The warmest water temperatures in Mar del Plata occur in January, averaging 26.7°C. The coolest conditions are in July at 11.0°C.

Monthly Water Temperatures

  • January: 26.7°C
  • February: 25.8°C
  • March: 24.1°C
  • April: 20.3°C
  • May: 16.3°C
  • June: 13.0°C
  • July: 11.0°C
  • August: 12.2°C
  • September: 14.8°C
  • October: 18.2°C
  • November: 22.3°C
  • December: 24.8°C

Nearby Dive Sites in Mar del Plata

Nearest Dive Centres to Blanca Rosita

Marine Life in Mar del Plata

Home to 33 recorded species including 19 reef fish, 7 sharks & rays, 3 whales & dolphins, 2 other, 1 crabs & lobsters, 1 sea snails & nudibranchs.

Notable Species

Recommended Packing List for Blanca Rosita

Based on average water temperature of 19.1°C, currents 3 cm/s.

  • Wetsuit (3-5mm) - comfortable for 19°C water
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories