Sharks Cove

For half the year Sharks Cove belongs to the surf reports; in summer the same water lies down flat and reveals Oʻahu's best shore dive. The cove's lava plumbing (tubes, skylighted caverns, canyons a diver can wander like alleys) holds turtles, schools of goatfish and tang, octopus, and the odd whitetip despite the name's overselling. Protection since 1983 shows in fish that barely yield right of way. Depths stay modest and the caverns keep daylight in sight, but surge judgment still matters on marginal days. Come October, the ocean repossesses the whole property without notice.

اللحظة التي جئت من أجلها: Lava tubes and skylights; tame reserve fish life; the North Shore in its brief, benign summer costume.

التضاريس: Lava tubes, arches, and boulder canyons inside a Marine Life Conservation District

نقطة الدخول: Rocky beach entry at Pūpūkea on the North Shore; strictly a May–September site: winter surf makes it lethal.

المخاطر: Winter surf closes the site absolutely; even summer south of a north swell brings surge in the tubes; slick rock entries.

الحفاظ على البيئة البحرية: Pūpūkea MLCD rules apply: no take of anything, and stay off the shallow reef shelf where waders trample.