Santa Luzia & Ilheu do Passa: Passa Islet Dive Site – Cape Verde
Site Overview
Passa Islet is a expert-level wall dive site located off the Santa Luzia & Ilheu do Passa coastline in Cape Verde, offering an extraordinary combination of volcanic underwater landscapes and rich Atlantic marine biodiversity. The site is accessed by boat from Mindelo (expedition departure), typically 27 to 33 minutes depending on sea conditions. Passa Islet reaches a maximum depth of 30 meters with the most productive diving occurring between five and 25 meters where the volcanic walls and reef structures provide shelter and feeding grounds for diverse marine species. The underwater topography features dramatic volcanic formations including vertical walls, overhangs, coral-encrusted pinnacles, and sandy channels that create a mosaic of distinct ecological zones. Marine life encounters commonly include Barracuda, Wahoo, Lemon Shark, Sand Tiger Shark, along with numerous smaller reef species that inhabit the volcanic substrate. The water temperature ranges from 22 degrees in winter to 26 degrees in late summer, with visibility typically between 18 and 30 meters during the calmer months from May through November. Seasonal visitors including humpback whales from February to May and whale sharks from July to October add an extraordinary dimension to dives in this region. The site's position in the eastern Atlantic means it benefits from nutrient-rich upwellings that sustain prolific coral growth and attract large pelagic species year-round. Santa Luzia & Ilheu do Passa is increasingly recognized as one of Cape Verde's premier diving destinations, offering uncrowded conditions and authentic Atlantic diving experiences that remain largely undiscovered by the broader diving community. The challenging conditions including strong currents, significant depth, and exposure to open Atlantic conditions demand experienced divers with appropriate certifications.
Dive Briefing
"The descent begins from the dive boat moored above the reef structure after your guide assesses current direction and strength. The dive profile typically begins with a gradual descent along the reef wall to approximately 17 meters where the current-facing side offers the best marine life encounters. Barracuda are frequently observed patrolling the wall at 14 to 22 meters, while Wahoo inhabit the coral gardens and overhangs throughout the mid-section of the dive. The volcanic substrate between 12 and 25 meters is encrusted with colorful sponges, gorgonian fans, and endemic Cape Verde corals that provide excellent macro photography opportunities between the larger species encounters. Lemon Shark can be found in crevices and ledges throughout the site. Your guide leads you progressively shallower along the reef contour, ensuring adequate bottom time for the safety stop at five meters. The final portion of the dive is spent exploring the shallow reef flat at three to eight meters where coral diversity is highest and sunlight creates ideal conditions for wide-angle photography. The safety stop is conducted along the upper reef before surfacing and returning to the boat for a total dive time of approximately 50 to 60 minutes."
Signature Marine Life
Barracuda
Sphyraena viridensis
Best: April, May, June
Wahoo
Acanthocybium solandri
Lemon Shark
Negaprion brevirostris
Best: April, May, June
Sand Tiger Shark
Carcharias taurus
Best: April, May, June
Whitetip Reef Shark
Triaenodon obesus
Yellowfin Tuna
Thunnus albacares
Best: April, May, June
Safety & Hazards
- Atlantic current variability requiring constant awareness and SMB deployment capability
- Fire coral and sharp volcanic rock formations requiring careful fin and hand placement
- Sea urchins on rocky substrate and rubble patches throughout the dive site
- Moray eels in crevices that may bite if provoked or if hands are placed in holes
- Strong surge near cavern entrances and shallow reef flats during Atlantic swell events
- Potential for nitrogen narcosis at deeper sections below twenty-five meters
Traveler Notes
Who is this for?
Passa Islet is reserved for expert-level divers with Rescue Diver certification or higher and extensive experience in challenging open ocean conditions including strong currents, significant depth, and remote locations with limited emergency support. The site presents serious challenges including depths reaching 30 meters, powerful Atlantic currents, and extended boat travel times that demand self-reliant diving skills and thorough emergency planning. Only divers with proven deep diving competence, excellent physical fitness, and the ability to make sound decisions under pressure should attempt this site. The rewards for expert divers are extraordinary: pristine walls with virtually no other divers, encounters with oceanic pelagic species rarely seen at more accessible sites, and the satisfaction of exploring some of the most remote and untouched dive sites in the entire Atlantic basin.
Quick Stats
Dive Logistics
- Permitted expedition operators only
Photography Info
Best for: wide_angle, macro
Nearby Stay
Expedition vessel
On board • 0km away
Pre-expedition Mindelo
Mindelo • 50km away