Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
Rosario is a reef dive site off Nosy Be, in the Diana region of northwest Madagascar, reached by boat through the channel waters and reef patches surrounding the island. It sits within the Mozambique Channel, an area where local operators run excursions out to the scatter of islands and reefs nearby. Divers have reported whale sharks passing through the site, though sightings of them are seasonal and not something to count on for every dive.
AI overviewMarine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Whale SharkRhincodon typusReported here · unconfirmed
Green Sea TurtleChelonia mydasReported here · unconfirmed
Paramontastraea peresiReported here · unconfirmed
Lace CoralPocillopora damicornisReported here · unconfirmed
Serpent CoralPachyseris speciosaReported here · unconfirmed
Small Giant ClamTridacna maximaReported here · unconfirmed
Danafungia horridaReported here · unconfirmed
Antler CoralPocillopora grandisReported here · unconfirmed
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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