Mahé dive sites

Whale shark sightings at Shark Bank are most likely during the transitional periods between the northwest and southeast monsoons, particularly from March to May and September to November. These periods bring nutrient-rich water upwellings that attract plankton and in turn the whale sharks that feed on them. Sightings are never guaranteed as whale sharks are transient visitors, but the probability is highest during these windows. Some dive operators also run dedicated whale shark snorkelling trips when sightings are reported in the area.

Shark Bank sits in exposed open water roughly 8 kilometres northwest of Mahé with no shelter from currents, waves, or weather. Currents can be strong and unpredictable, changing direction during the dive. The plateau top sits at around 20 metres with the most interesting features between 25 and 40 metres, requiring good air management and decompression awareness. Surface conditions can be rough, and the boat ride can be uncomfortable. Dive operators typically require Advanced Open Water certification and logged open-water experience.

Shark Bank is reached by dive boat from operators based on Mahé's northwest coast, primarily from Beau Vallon or Victoria. The boat ride takes approximately 30 to 45 minutes depending on conditions. Due to its exposed position, the trip is weather-dependent and may be cancelled when swells are too high or visibility is expected to be poor. Most operators offer Shark Bank as a special trip that requires advance booking and may have minimum diver number requirements.