Bowbelle Wreck, Madeira: Deep Artificial Reef Off Madalena do Mar

The Bowbelle, formerly known as the Bom Rei, sits upright on the sandy bottom as a prominent landmark off the coast of Madalena do Mar. This steel wreck measures approximately 90 metres in length and acts as a substantial artificial reef in the open ocean. Unlike many other dives in the region that follow steep volcanic walls, this site is an offshore wreck situated on a relatively flat seabed. You will approach the vessel via boat, which may anchor or hook directly onto the structure depending on the sea conditions.

Your descent will take you through the water column to a depth between 21 and 32 metres. Once you reach the wreck, you will find a large, intact structure that has been heavily colonized by marine growth. The silhouette of the hull is clearly visible, providing a strong sense of scale as you navigate the perimeter. Because of the depth and the way the structure sits on the sand, opportunities for internal penetration are limited. You should focus your exploration on swimming along the exterior of the vessel to observe the detail of the hull.

The site's topography creates a unique habitat where the steel meets the sandy substrate. This interface is an ideal area to look for resident species that rely on the hard surfaces provided by the wreckage. You can expect to find various organisms attached to the hull, including sponges and corals that have claimed the metal. The combination of the vertical surfaces and the surrounding sand makes for a high-contrast environment that is particularly photogenic. The layout allows for several different lines of exploration around the exterior of the 90-metre structure.

As you navigate the periphery of the wreck, you will encounter a variety of reef fish and invertebrates. Look closely at the structure and the sandy patches immediately adjacent to the hull for moray eels and octopus seeking shelter. You may also spot triggerfish and pufferfish patrolling the area. Cuttlefish often utilize the various nooks and crannies of the wreck for camouflage. The presence of these animals indicates a healthy, established ecosystem thriving on the artificial substrate.

The resident fauna also includes larger species that frequent the edges of the wreck. You will likely see groupers lurking near the deeper sections of the hull or resting on the seabed. Rays often glide across the sandy bottom surrounding the vessel, occasionally appearing from beneath the edges of the steel structure. For those observing closely, sea urchins and starfish can be found across the seabed and the lower parts of the wreck. The biodiversity here is a direct result of the wreck providing a permanent hard surface in an otherwise sandy environment.

Conditions at Bowbelle are heavily influenced by the external environment, particularly wind and swell. Because the wreck is located 180 metres offshore, it is susceptible to changes in sea state. The current can become a drift-style movement, common in deep-style wreck dives, which you should account for during your bottom time. Visibility is generally good, typically ranging from 10 to 30 metres, though this depends on the recent swell and local currents. It is a site that rewards divers who time their visits to coincide with calmer sea states.

The best time to plan a dive here is between May and September, when the Atlantic conditions are most stable. During these months, you are more likely to experience the higher end of the visibility range and more manageable surface conditions. While the site can be dived year-round, the offshore location means that wind and swell will dictate whether the site is safe and comfortable. Always check the local weather and swell forecasts before heading out to ensure the sea state is appropriate for a boat dive at this depth.