intermediate
    (85)

    Silhouette Marine Park – Silhouette Island Dive Site

    28m Max
    15-30m Vis
    boat

    Site Overview

    Silhouette Marine Park is a remarkable dive site in the Silhouette Island region of Seychelles, situated in the warm tropical waters of the Indian Ocean among the stunning granitic and coralline islands that make this archipelago one of the world's most beautiful diving destinations. The site features depths from 5 to 28 meters with an average depth of 16 meters, offering an extraordinary underwater experience showcasing the unique marine biodiversity and dramatic granite and coral formations that Seychelles is celebrated for among divers worldwide. Renowned for its excellent visibility often exceeding twenty meters and its rich tropical marine communities, Silhouette Marine Park attracts divers seeking pristine encounters with Grey Reef Shark, Napoleon Wrasse, Scalloped Hammerhead and other remarkable marine species in a warm Indian Ocean setting. The granitic and coralline origins of the Seychelles create a stunning underwater landscape of massive boulders, coral walls, pinnacles, and sandy channels that provide habitat for incredibly diverse tropical marine communities. The surrounding Indian Ocean waters, influenced by the warm equatorial currents and seasonal monsoon patterns, bring nutrient-rich conditions supporting abundant marine life including seasonal whale shark aggregations from September to November, manta rays, hawksbill and green turtles, and numerous reef fish species. Visibility typically ranges between ten and thirty meters depending on season and plankton activity. Water temperatures range from twenty-four to thirty degrees Celsius depending on season and exposure. Silhouette Marine Park consistently ranks among the top dive sites in the Silhouette Island region, drawing dedicated divers who seek exceptional tropical diving experiences in one of the Indian Ocean's most pristine and biodiverse marine environments combining granite landscapes with vibrant coral ecosystems.

    Dive Briefing

    "A typical dive at Silhouette Marine Park begins with a boat entry into the warm Indian Ocean waters, descending to the main reef or granite formation at approximately 16 meters while orienting yourself and equalizing before exploring the remarkable Seychelles underwater landscape. Once established on the main formation, divers should swim along the primary structure exploring diverse habitats, moving between granite boulders, coral bommies, and sandy channels while maintaining excellent buoyancy control to protect the fragile reef communities below. The most productive depth zone is between 6 and 23 meters where the highest concentration of reef fish species and photographic opportunities are abundant. Navigate along the reef edge watching for pelagic species in the deep blue, and check the granite overhangs and coral ledges where moray eels, groupers, and reef sharks shelter from the current. The Seychelles ocean environment requires careful current awareness at exposed sites, as conditions can change with tidal shifts around the granite headlands and channel entrances. Monitor depth and NDL particularly near 28 meters, and always maintain a conservative approach to dive planning given the importance of safety margins in the warm tropical environment. Scan the sandy channels and rubble zones between reef sections for nudibranchs, pipefish, and interesting macro life hiding among the granite and coral formations. Conclude the dive with a slow ascent and a generous safety stop at 5 meters, deploying your DSMB before surfacing and signaling the boat crew for pickup."

    Signature Marine Life

    Grey Reef Shark

    high

    Carcharhinus amblyrhynchos

    Best: April, May, October

    Napoleon Wrasse

    high

    Cheilinus undulatus

    Best: April, May, October

    Scalloped Hammerhead

    high

    Sphyrna lewini

    Best: April, May, October

    Whale Shark

    high

    Rhincodon typus

    Best: April, May, October

    Hawksbill Turtle

    very high

    Eretmochelys imbricata

    Best: April, May, October

    Spotted Eagle Ray

    high

    Aetobatus narinari

    Best: April, May, October

    Green Turtle

    very high

    Chelonia mydas

    Best: April, May, October

    Butterflyfish

    very high

    Chaetodon auriga

    Best: April, May, October

    Parrotfish

    very high

    Chlorurus sordidus

    Best: April, May, October

    Giant Moray

    high

    Gymnothorax javanicus

    Best: April, May, October

    Safety & Hazards

    • Strong currents around granite headlands and channel entrances requiring reef hook use and DSMB deployment
    • Boat traffic near popular shore-access dive sites in the inner islands requiring surface marker buoy
    • Sea urchins on rocky shore entries and shallow reef flats requiring protective footwear
    • Variable visibility near river mouths after heavy rainfall, especially during northwest monsoon
    • Depth changes around granite boulders can be disorienting in low visibility requiring careful navigation
    Nearest Chamber
    Victoria Hospital, Mahé
    5km away

    Traveler Notes

    Who is this for?

    Silhouette Marine Park is best suited for Advanced Open Water certified divers comfortable with moderate depths and potential current exposure in the Seychelles Indian Ocean environment. The site rewards experienced divers with dramatic granite formations, diverse tropical marine communities, and the possibility of encounters with larger pelagic species including reef sharks, eagle rays, and tuna patrolling the deep water beyond the reef edge. Underwater photographers will find exceptional wide-angle opportunities with sheer granite walls and coral bommies as backdrops, while macro enthusiasts can document the extraordinary diversity of nudibranchs and small reef species unique to the Seychelles archipelago. Divers should be comfortable with drift diving techniques and DSMB deployment as conditions may require current management skills around exposed headlands and channel entrances.

    seychelles
    marine-park
    biodiversity
    whale-sharks
    silhouette

    Quick Stats

    Difficultyintermediate
    CertificationAdvanced Open Water
    Currentmoderate
    Water Temp24-30°C
    Best TimeApril - November

    Dive Logistics

    Operators
    • Silhouette Dive Centre
    • Labriz Dive School
    • Silhouette Marine Adventures
    Pricing Guide
    $90 - $180
    Per 2-tank boat dive

    Photography Info

    Recommended Gear
    16-35mm
    60mm macro
    100mm macro

    Best for: wide_angle, macro

    Nearby Stay

    Hilton Seychelles Labriz Resort & Spa

    Silhouette Island1km away

    Check Availability

    Silhouette Island Lodge

    Silhouette Island1km away

    Check Availability