[{"data":1,"prerenderedAt":245},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-henrietta-rocks":9,"spot-henrietta-rocks":51},{"entries":4,"total":5,"period":6,"type":7,"generated_at":8},[],0,"all_time","reports","2026-10-03T06:32:05.526386Z",{"title":10,"description":11,"canonical_url":12,"og_image":13,"structured_data":14,"breadcrumbs":44},"Snorkeling Conditions at Henrietta Rocks - How's the Spot","Check snorkeling conditions at Henrietta Rocks, Western Australia. 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This 19th-century iron steamship lies in shallow,...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-32.012842,115.541435,{"@type":25,"addressRegion":26,"addressCountry":27},"PostalAddress","Western Australia","Australia",{"@context":16,"@type":29,"name":30,"description":11,"url":12,"breadcrumb":31},"WebPage","Snorkeling Conditions at Henrietta Rocks",{"@context":16,"@type":32,"itemListElement":33},"BreadcrumbList",[34,39,42],{"@type":35,"position":36,"name":37,"item":38},"ListItem",1,"Home","https:\u002F\u002Fhowsthespot.com",{"@type":35,"position":40,"name":26,"item":41},2,"https:\u002F\u002Fhowsthespot.com\u002Fexplore?region=western-australia",{"@type":35,"position":43,"name":18,"item":12},3,[45,47,49],{"label":37,"href":46},"\u002F",{"label":26,"href":48},"\u002Fexplore?region=western-australia",{"label":18,"href":50},"\u002Fspots\u002Fhenrietta-rocks",{"id":52,"name":18,"slug":53,"latitude":22,"longitude":23,"description":54,"difficulty":55,"image_url":13,"status":56,"tide_constituents":57,"hazard_entries":108,"access_info_structured":157,"area_boundary":123,"routes":123,"created_at":164,"updated_at":165,"today_conditions":166,"today_verdict_view":186,"images":212,"submitted_by":242,"region_name":26,"verification_status":244,"verified_at":123,"disputed":200,"verifier_count":5,"last_verified_display_name":123},"d18f20f3-9500-443c-9363-29cc921eea35","henrietta-rocks","Just off Rottnest Island's northeastern shore, Henrietta Rocks is a spectacular snorkeling site centered around the historic wreck of the SS Shark. This 19th-century iron steamship lies in shallow, crystal-clear water just 20 metres from the beach, encrusted with vibrant corals and thriving with fish life. The surrounding limestone reef forms a natural cove with calm, protected waters, making it easy to swim out to the wreck and explore. With its white sandy beach, turquoise lagoon, and the haunting silhouette of the wreck just below the surface, Henrietta Rocks offers one of the most accessible and rewarding snorkeling experiences in the Perth region.","beginner","published",{"name":58,"amplitude":74,"phase":90,"latitude":22,"model":106,"epoch":107},[59,60,61,62,63,64,65,66,67,68,69,70,71,72,73],"2N2","J1","K1","K2","M2","M4","MF","MM","N2","O1","P1","Q1","S1","S2","T2",[75,76,77,78,79,80,81,82,83,84,85,86,87,88,89],0.004246646050641868,0.00929715593939091,0.16671990024248595,0.013763551056940972,0.05442926686434654,0.004831037571235754,0.005031046440380575,0.004593391224684983,0.013459586396300377,0.12210902263225695,0.05066823186019397,0.023037956390366602,0.013620958504661312,0.04165109266427433,0.002988107938348202,[91,92,93,94,95,96,97,98,99,100,101,102,103,104,105],38.07168459976013,226.5547116816707,181.76307460570933,39.03973987574349,58.69595906491372,131.53454162642942,33.33911075183571,222.96465763182368,105.85905092868404,176.01364000372735,171.0963195429075,173.02286853875765,319.8592487484466,64.23281584403975,227.84649155086737,"EOT20","1992-01-01T00:00:00Z",[109,115,120,124,129,133,136,139,142,145,148,151,154],{"name":110,"description":111,"severity":112,"season_start":113,"season_end":114},"Swell and Surge","Southern and western beaches (e.g., Strickland Bay) can experience strong swell and wave surge, especially in winter months.","caution",5,9,{"name":116,"description":117,"severity":112,"season_start":118,"season_end":119},"Strong Winds","Afternoon sea breezes (the 'Fremantle Doctor') can pick up suddenly, creating choppy surface conditions and making swimming back to shore tiring.",10,12,{"name":121,"description":122,"severity":112,"season_start":123,"season_end":123},"Boat Traffic","Ferries, charter vessels, and private boats operate year-round in the main channels near Thomson Bay and the jetty area.",null,{"name":125,"description":126,"severity":127,"season_start":128,"season_end":119},"Stinging Jellyfish","Box jellyfish and bluebottles can occasionally be present during warmer months in nearshore waters.","warning",11,{"name":130,"description":131,"severity":127,"season_start":43,"season_end":132},"Strong offshore winds","Southerly sea breezes can pick up quickly in the afternoon, making conditions choppy and creating a risk of being blown offshore.",4,{"name":134,"description":135,"severity":112,"season_start":123,"season_end":123},"Sharp limestone reef","The limestone reef formations have sharp edges; cuts and scrapes are common without reef shoes or fins.",{"name":137,"description":138,"severity":112,"season_start":123,"season_end":123},"Sharp limestone reef edges","The reef surrounding the wreck has sharp limestone edges that can cut exposed skin. Wear reef shoes or fins.",{"name":140,"description":141,"severity":112,"season_start":123,"season_end":123},"Boat traffic near wreck","The wreck site is occasionally visited by small boats and kayaks. Stay aware of your surroundings.",{"name":143,"description":144,"severity":112,"season_start":123,"season_end":123},"Changing tide conditions","Water clarity and current can shift with the tide. Check conditions before entering and avoid strong outgoing tides.",{"name":146,"description":147,"severity":112,"season_start":123,"season_end":123},"Sharp reef limestone","The limestone reef edge has sharp, jagged edges that can cause cuts and scrapes. Wear reef shoes or fins.",{"name":149,"description":150,"severity":112,"season_start":123,"season_end":123},"Sharp wreckage","Exposed metal and broken sections of the Shark shipwreck can cause cuts if touched.",{"name":152,"description":153,"severity":112,"season_start":123,"season_end":123},"Boat traffic","The spot is offshore near a navigation channel; occasional boat traffic nearby.",{"name":155,"description":156,"severity":112,"season_start":123,"season_end":123},"Marine stingers (summer)","Warmer summer waters may bring box jellyfish and other marine stingers.",{"directions":158,"parking":159,"facilities":160,"fees":162,"access_method":163},"From the main settlement on Rottnest Island, Henrietta Rocks is about a 30-minute walk east along the coastline or an 8-minute bike ride. Follow the sealed path past the golf course towards the northeastern side of the island. The Rottnest Island bus also stops nearby.","Bicycle racks are available near the beach; no car parking on Rottnest Island — visitors use bicycles or the bus service.",[161],"parking","No additional fee beyond Rottnest Island entry and ferry costs. 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