Mandalay Shipwreck - 1966 Maritime Heritage

Man snorkeling a shipwreck lying on the sandy bottom of the ocean

The Mandalay rests on Long Reef in the eastern part of Biscayne National Park, its steel hull and scattered debris now covered with marine growth and colonized by reef fish. This 110-foot schooner was a luxury cruise ship that ran aground on New Year's Day 1966 following a navigation error by the captain. Today, it is one of the park's best shallow dive sites, lying at 20-30 feet and offering divers an opportunity to explore intact ship structure, fittings, and the artificial reef ecosystem that has flourished around the wreck.

Access & viewing

GPS Coordinates: 25.442167, -80.121683
Accessibility: Water-based access only. Requires boat charter or private vessel. SCUBA certification required. Not suitable for non-swimmers or young children.

Conditions & safety

Permits Required: 0

Planning advice

Nearby Attractions: Other shipwrecks in the park: Alicia, Arratoon Apcar, Erl King, Lugano. Fowey Rocks Lighthouse. Elliott Key and Boca Chita islands with established campgrounds.
Nearby Facilities: Boat launch at Convoy Point; no other facilities at the site. Nearest marina services and amenities in Key Largo (25 miles) and Miami area (30+ miles).
Best Time To Visit: December to May for clearest water, calmest seas, and optimal diving visibility. Water temperature ranges from 70-75°F in winter to 80-85°F in summer. Avoid June-November hurricane season and summer afternoon thunderstorms.
Tips Advice: Bring a wide-angle underwater camera to capture the full wreck structure in shallow water.
Plan an early-morning boat departure (6am-10am) for the calmest water conditions and best visibility.
The wreck lies at 20-30 feet—shallow enough for recreational divers but deep enough to require proper training and dive discipline.
Marine growth (algae, coral, fish) now encrusts the wreck; stay outside wreck structure to avoid entanglement and preserve the archaeological site.
Check current conditions and book through an experienced Biscayne dive operator for safety and navigation.
Insider Tips: Bring a wide-angle underwater camera; the wreck fits perfectly in wide-angle frames at these depths.
Early-morning trips offer the calmest water—depart by 6am for ideal conditions and best visibility.
At 20-30 feet, this is one of the shallowest wreck dives in the park, ideal for recreational certification-level divers building wreck diving confidence.
Marine life now colonizes the wreck completely; the ecosystem is thriving but the wreck itself is delicate—observe without touching to preserve the archaeological site.

More details

Park Area: Eastern Biscayne, Long Reef
Family Friendly Notes: Suitable only for families with teenagers (16+) who are certified SCUBA divers or willing to pursue certification. No facilities for young children. Requires physical fitness for water entry/exit and diving. Strong swimmers recommended.
Attraction Type: Shipwreck / Maritime Archaeological Site
Elevation Feet: 0
Accessibility Level: Boat access required; SCUBA certification required
How To Get There: Access by private boat or charter service from Key Largo or Miami. Boat launch available at Convoy Point in the park. Navigate by GPS coordinates: 25.442167, -80.121683.
Parking Availability: Not applicable—water-based access only.
Road Type: Water access; no road access
Seasonal Access: Year-round water access. Diving conditions optimal December-May. Hurricane season (June-November) may affect boating safety and visibility.
Entry Fees: No entrance fee
Main Features: Steel-hulled schooner, Long Reef location, shallow-water dive site at 20-30 feet, intact wreck structure with marine life colonization, artificial reef ecosystem
What Youll See: The steel hull structure of the Mandalay, intact cabin fixtures and fittings, scattered debris covered with algae and coral growth, schools of grouper, snapper, and jacks, the thriving artificial reef ecosystem surrounding and colonizing the wreck
Unique Characteristics: Built by George Lawley & Son Corporation in 1928 for $177,000. Designed by John G. Alden Naval Architects. Featured luxury finishes in mahogany, brass, and ivory with teak decking. Grounded by captain's navigation error on New Year's Day 1966. One of the park's most accessible shipwrecks with intact structure.
Safety Considerations: SCUBA certification required—diving hazard. Maximum safe recreational diving depth 130 feet; this wreck at 20-30 feet is within recreational limits but requires dive discipline and proper training. Risk of nitrogen narcosis at depth. Never enter the wreck structure without technical diving training and a safety line. Water temperature 70-85°F depending on season. Strong current possible in certain conditions. Always dive with a buddy and follow dive operator safety briefing.
Best Viewpoints: Directly above and around the wreck structure. Approach from multiple angles at 20-30 feet depth to capture full profile and structural detail.
Photo Opportunities: Photograph the wreck profile from 30-50 feet above, circling around the hull. Best natural light between 10am-2pm when sun angle illuminates hull detail. Wide-angle compositions for full structure; macro work on marine growth and fish sheltering in the wreck.
Photography Spots: Wreck profile shots from 30-50 feet distance; macro detail shots of coral, algae, and fish on hull surfaces; wide-angle full-structure compositions with sea floor in frame
Sunrise Sunset Quality: Variable depending on boat location and sea state. Early morning often offers flat water but limited light; evening light is stronger but seas rougher.
Visitor Center Present: 0
Restrooms Available: 0
Picnic Areas: 0
Interpretive Signs: 0
Cell Service: Poor to none when on the water
Water Available: 0
Guided Tours Available: 0
Trailheads Here: None—water-based site only. Access via boat launch at Convoy Point or charter service.
Connecting Trails: None—water-based site only. Boat routes connect to Elliott Key Campground, Boca Chita Campground, and Convoy Point visitor area.
Nearby Services: Dive shops, boat rental, and charter services in Key Largo (approximately 25 miles north). Marina services in Miami area. No facilities at the wreck site.
Common Wildlife: Grouper, snapper, parrotfish, jacks, barracuda, sea turtles, moray eels, octopi, spiny lobster
Best Wildlife Times: Year-round. Peak fish activity in early morning hours. Sea turtles more visible in summer months.
Geological Formation Type: Maritime Archaeological Site
Scientific Interest: Maritime archaeology and ship history. The Mandalay provides research value in early 20th-century vessel design, steel construction methods, materials preservation in saltwater, and maritime heritage. The grounding event is documented in historical record; wreck structure offers insights into vessel construction and long-term material degradation patterns in marine environments.
Winter Access: Year-round water access. Winter diving (December-February) offers clearest water and calmest conditions. Water temperature 70-72°F—wetsuit recommended.
Best Visit Times: Early morning (6am-10am) for calmest water, best visibility, and optimal diving conditions
Best Season: December to May
Weather Patterns: Afternoon thunderstorms common in summer. Hurricane season (June-November) brings rough seas and poor visibility. Winter cold fronts create strong currents and choppy water. Best conditions in early morning hours before wind picks up.
Busiest Season: Winter to early spring (December-April) when diving conditions are optimal and water is clearest
Fishing Species: Grouper, snapper, permit, mackerel
Fishing Nearby: 1
Swimming Allowed: 1
Boating Allowed: 1
Climbing Areas: 0
Review Summary: Divers consistently rank the Mandalay as one of Biscayne's best wreck dives due to shallow depth, clear water in winter, and intact structure visible to recreational divers. Visitors appreciate the balance of accessibility and historic interest. Site remains popular year-round but most accessible December-May.

Location

Frequently asked questions

Can non-divers visit the Mandalay?

No—the wreck lies at 20-30 feet underwater and requires SCUBA certification. Non-diving family members can enjoy other park activities like snorkeling at shallower sites or birding.

Is the wreck safe to explore?

The wreck structure is intact but fragile and colonized by marine life. Never enter the wreck interior. Stay outside the hull to avoid entanglement and preserve the archaeological site. Always dive with a partner and follow your dive operator's safety briefing.

What will I see underwater?

The 110-foot steel hull, cabin structures, railings, and scattered fixtures covered in algae and small corals. Grouper, snapper, jacks, and other reef fish shelter throughout the wreck structure.

Do I need to bring my own boat?

No—you can charter a boat and guide from dive operators in Key Largo. Alternatively, if you own a boat, a launch ramp is available at Convoy Point. Navigate by GPS: 25.442167, -80.121683.

What's the best season to dive the Mandalay?

December to May offers the clearest water (50-80 foot visibility), calmest seas, and best weather. Summer is accessible but visibility drops to 30-50 feet and thunderstorms are frequent.

Is the site fragile? Can we touch things?

Yes—the wreck is a maritime archaeological site. Do not touch, remove, or disturb any part of the wreck, debris, or marine growth. Observe only. Respect helps preserve the site for future generations and scientific research.

How deep is the wreck, and am I ready for it?

The wreck sits at 20-30 feet, within recreational SCUBA limits. You should be comfortable at that depth and have experience with wreck protocols (staying outside, avoiding entanglement). Newer divers should take a wreck specialty course or dive with an experienced guide.