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
Grandad's is a dive site off Maui in the Hawaiian Islands, in the waters off the island's coast within the central Pacific archipelago of the United States. Dive sites in this part of Maui are typically reached by boat from local harbors.
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.
Hump CoralPorites lobataReported here · unconfirmed
Saddle WrasseThalassoma duperreyReported here · unconfirmed
Dusky SurgeonfishAcanthurus nigrofuscusReported here · unconfirmed
Porites compressaReported here · unconfirmed
Hawaiian Spotted TobyCanthigaster jactatorReported here · unconfirmed
Goldring SurgeonfishCtenochaetus strigosusReported here · unconfirmed
Cauliflower CoralPocillopora meandrinaReported here · unconfirmed
Blue-eye DamselPlectroglyphidodon johnstonianusReported 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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