[{"data":1,"prerenderedAt":272},["ShallowReactive",2],{"leaderboard-total":3,"spot-waterfall-bay-caves":9,"spot-seo-waterfall-bay-caves":238},{"entries":4,"total":5,"period":6,"type":7,"generated_at":8},[],0,"all_time","reports","2026-10-02T06:59:37.379659Z",{"id":10,"name":11,"slug":12,"latitude":13,"longitude":14,"description":15,"difficulty":16,"image_url":17,"status":18,"tide_constituents":19,"hazard_entries":70,"access_info_structured":150,"area_boundary":109,"routes":109,"created_at":158,"updated_at":159,"today_conditions":160,"today_verdict_view":182,"images":209,"submitted_by":234,"region_name":236,"verification_status":237,"verified_at":109,"disputed":197,"verifier_count":5,"last_verified_display_name":109},"2a8f1182-352d-43ba-a641-fd32c9d17166","Waterfall Bay Caves","waterfall-bay-caves",-43.050541,147.950854,"Waterfall Bay Caves, centred on the massive Cathedral Cave system on the Tasman Peninsula, is Australia's largest sea cave complex and an extraordinary snorkelling and dive location. Accessed by boat from Eaglehawk Neck's Doo Town wharf, the site features towering vertical cliffs that plunge into deep teal water, a maze of interconnected sea caves, tunnels, arches, and the spectacular Cathedral Arch — a massive natural rock archway penetrating through Waterfall Bluff. Sunlight shafts into the caverns illuminating colourful walls draped in sponges, sea squirts, and bryozoans normally found at greater depths. The sheer scale of the cave system, with at least a dozen linked passages including Skull Cave, the Catacombs, and Revelation Bend, makes this a world-class underwater playground in Tasmania's dramatic coastline.","advanced","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_waterfall-bay-caves_0_5ca0d0548218.jpg","published",{"name":20,"amplitude":36,"phase":52,"latitude":13,"model":68,"epoch":69},[21,22,23,24,25,26,27,28,29,30,31,32,33,34,35],"2N2","J1","K1","K2","M2","M4","MF","MM","N2","O1","P1","Q1","S1","S2","T2",[37,38,39,40,41,42,43,44,45,46,47,48,49,50,51],0.01288878254376405,0.008562341307081653,0.1625176027252124,0.012417464663252314,0.2765428864827135,0.0029298968963829765,0.008732475615402531,0.0031237297181147625,0.07461111608480264,0.10811637995820242,0.0512523219525258,0.026309541093446093,0.01108767621204379,0.02280306026402482,0.0037230217824996453,[53,54,55,56,57,58,59,60,61,62,63,64,65,66,67],269.9967197364035,318.5687734858514,298.70636745984837,278.5872624829128,311.89778772064096,243.47222804490912,155.1037891494243,182.70890535420352,299.4296810956431,272.5142363318257,293.6300373658933,251.34995199726336,24.028429365277844,317.72551722665406,242.4652795873394,"EOT20","1992-01-01T00:00:00Z",[71,77,81,86,91,94,97,100,103,106,110,113,116,120,123,126,129,132,135,138,141,144,147],{"name":72,"description":73,"severity":74,"season_start":75,"season_end":76},"Overhead cave environment","Multiple interconnected sea caves and tunnels with limited direct surface access. Entrapment risk, silt-out potential, and disorientation hazard for inexperienced snorkellers.","danger",1,12,{"name":78,"description":79,"severity":80,"season_start":75,"season_end":76},"Boat traffic","Access is via a narrow inlet where dive boats tie to wall ropes. Boats entering and exiting the cove create overhead hazards in the confined space.","warning",{"name":82,"description":83,"severity":84,"season_start":85,"season_end":76},"Cold water temperatures","Water temperature averages 17°C even in summer (February). Prolonged exposure risks hypothermia without adequate thermal protection.","caution",5,{"name":87,"description":88,"severity":80,"season_start":89,"season_end":90},"Strong surge and currents","Swell can create strong surge through cave tunnels and around the bluff. Requires calm sea conditions for safe entry and exit.",6,9,{"name":92,"description":93,"severity":84,"season_start":75,"season_end":76},"Rocky boulder seafloor","The bottom is covered in large boulders at ~22 m depth, presenting entanglement and footing hazards when navigating cave entrances.",{"name":95,"description":96,"severity":74,"season_start":75,"season_end":76},"Dark enclosed cave tunnels","Multiple tunnels including Revelation Bend and narrow passages require lights; zero natural light in parts of Skull Cave and Catacombs.",{"name":98,"description":99,"severity":80,"season_start":85,"season_end":90},"Cold water temperature","Water temperature averages 17°C in summer (February) and drops significantly in winter, increasing risk of hypothermia.",{"name":101,"description":102,"severity":74,"season_start":75,"season_end":76},"Narrow passage restrictions","Some tunnels are very narrow and low-ceilinged, requiring careful finning and good buoyancy control to avoid disorientation or entrapment.",{"name":104,"description":105,"severity":80,"season_start":89,"season_end":90},"Swell and surge","The cave system can experience surge and reduced visibility during rough weather; very calm conditions needed for outer caves.",{"name":107,"description":108,"severity":80,"season_start":109,"season_end":109},"Cave system navigation","Extensive maze of interconnected tunnels and chambers with multiple exits; very easy to become disoriented without a guide or cave-diving certification.",null,{"name":111,"description":112,"severity":74,"season_start":109,"season_end":109},"Low visibility in caves","Inside the caves and tunnels, natural light fades to near-total darkness; silt can easily be stirred up reducing visibility to zero.",{"name":114,"description":115,"severity":84,"season_start":109,"season_end":109},"Restricted passages","Narrow tunnels such as Revelation Bend require careful finning and can be tight for larger divers, with low ceiling sections.",{"name":117,"description":118,"severity":80,"season_start":89,"season_end":119},"Weather-dependent boat access","The site is in an exposed location on the Roaring Forties; swells and wind can make entry through the arch dangerous or impossible.",8,{"name":121,"description":122,"severity":80,"season_start":89,"season_end":90},"Strong surge and swell at cave entrances","Surge pushes into cave mouths, especially around Cathedral Arch and Skull Cave. Only diveable in calm conditions; surge can slam snorkelers against rocks.",{"name":124,"description":125,"severity":74,"season_start":75,"season_end":76},"Limited exit points","The cave system has long narrow passages like Revelation Bend that are very dark and tight. Easy to become lost without an experienced guide.",{"name":127,"description":128,"severity":74,"season_start":75,"season_end":76},"Unfenced Cliff Tops","The walking track and lookout areas sit directly atop 300-metre cliffs with no guardrails — extreme care needed near the edge.",{"name":130,"description":131,"severity":80,"season_start":89,"season_end":90},"Exposed Swell & Surge","The bay opens to the Tasman Sea and can receive large southerly swells and surge against the rocky shoreline.",{"name":133,"description":134,"severity":84,"season_start":76,"season_end":76},"Seasonal Waterfall Flow","The waterfall is often reduced to a trickle or dry stain in summer heat — best flow after heavy rain.",{"name":136,"description":137,"severity":84,"season_start":75,"season_end":76},"Slippery wet rocks","Rock platforms at cave entrances are often wet and coated with algae, making footing treacherous when entering or exiting the water.",{"name":139,"description":140,"severity":80,"season_start":89,"season_end":90},"Surge around cave entrances","Ocean swell can create strong surge conditions near cave mouths, pushing snorkelers against rugged dolerite walls.",{"name":142,"description":143,"severity":84,"season_start":75,"season_end":76},"Sudden depth changes","The seafloor drops off rapidly from shallow rocky ledges into deeper water inside the caves, requiring good buoyancy control.",{"name":145,"description":146,"severity":84,"season_start":109,"season_end":109},"Strong Ocean Swell","Exposed to Tasman Sea swell rolling into the bay, conditions can change rapidly especially after heavy weather.",{"name":148,"description":149,"severity":84,"season_start":109,"season_end":109},"Rough Cliff Access","Surrounding terrain features steep, rocky cliff edges and boulder gardens that can be hazardous when entering or exiting the water.",{"directions":151,"parking":152,"facilities":153,"fees":156,"access_method":157},"Drive ~1 hour south-east from Hobart to Eaglehawk Neck on the Tasman Peninsula. From Eaglehawk Neck, continue a few minutes to Doo Town where the boat ramp\u002Fwharf is located. From the wharf, head south into the Tasman Sea for less than 5 km to reach Waterfall Bay. The Cathedral Caves inlet is just south of Waterfall Bluff. GPS: S43° 03' 49.4\" E147° 57' 17.3\" (WGS84). Alternatively, snorkel tours operate from Eaglehawk Neck.","Limited parking available near the Doo Town boat ramp\u002Fwharf area.",[154,155],"parking","boat_ramp","No entry fee for the waterway. Snorkel\u002Fdive tours with Eaglehawk Dive Centre charge tour rates.","boat","2026-07-27T02:57:28.977403Z","2026-08-04T05:30:44.786684Z",{"verdict":161,"evaluated_at":162,"models":163},"marginal","2026-10-02T02:16:06.998726Z",[164,171,176],{"model_name":165,"is_favourable":166,"value":167,"threshold":168,"unit":169,"operator":170},"Wind Speed",true,2.53,10,"kn","lte",{"model_name":172,"is_favourable":166,"value":173,"threshold":174,"unit":175,"operator":170},"Wave Height",0.186,0.5,"m",{"model_name":177,"is_favourable":166,"value":178,"threshold":179,"unit":180,"operator":181},"Visibility",2.39,2,"","gte",{"verdict":161,"rating":183,"evaluated_at":162,"generated_at":162,"source":184,"confidence":185,"visibility":188,"parameters":189,"models_passed":192,"models_total":85},"Fair","precomputed",{"level":186,"value":187},"High",100,{"score":178,"rating":109,"confidence":109},[190,193,198,201,206],{"name":172,"value":191,"label":109,"unit":175,"favourable":166,"score":192,"optimal_max":174,"marginal_max":75},0.18600000000000003,3,{"name":194,"value":195,"label":109,"unit":196,"favourable":197,"score":5,"optimal_max":119,"marginal_max":76},"Swell Period",12.15,"s",false,{"name":165,"value":199,"label":109,"unit":169,"favourable":166,"score":192,"optimal_max":168,"marginal_max":200},2.5324544437124827,15,{"name":202,"value":203,"label":109,"unit":204,"favourable":166,"score":192,"optimal_max":85,"marginal_max":205},"Precipitation",2.5,"mm",20,{"name":207,"value":109,"label":208,"unit":180,"favourable":197,"score":75,"optimal_max":109,"marginal_max":109},"Tidal Phase","ebb",[210,217,220,227],{"id":211,"image_url":17,"sort_order":5,"is_primary":166,"moderation_status":212,"license":213,"license_url":214,"attribution":215,"author_name":216},"dbc09983-a077-4ce9-a997-38258ac158d5","approved","CC BY 2.0","https:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F2.0\u002F","Photo by Ed Dunens","Ed Dunens",{"id":218,"image_url":219,"sort_order":179,"is_primary":197,"moderation_status":212,"license":213,"license_url":214,"attribution":215,"author_name":216},"2c7a8b49-68f8-4e9c-bd6f-af811a093b8e","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_waterfall-bay-caves_2_5a603843101a.jpg",{"id":221,"image_url":222,"sort_order":192,"is_primary":197,"moderation_status":212,"license":223,"license_url":224,"attribution":225,"author_name":226},"a062aacf-474a-4b2e-8ea3-d3305fb81df8","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_waterfall-bay-caves_3_3823ae602d2b.jpg","CC BY-SA 4.0","https:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F","Photo by Tasmoons","Tasmoons",{"id":228,"image_url":229,"sort_order":230,"is_primary":197,"moderation_status":212,"license":231,"license_url":232,"attribution":233,"author_name":233},"a3e9155c-7e70-4b1b-be18-7211daf97097","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_waterfall-bay-caves_4_da7512f5f009.jpg",4,"CC BY-SA 3.0","https:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F3.0\u002F","Richard Horvath",{"display_name":235},"Daniel","Tasmania","unverified",{"title":239,"description":240,"canonical_url":241,"og_image":17,"structured_data":242,"breadcrumbs":265},"Snorkeling Conditions at Waterfall Bay Caves - How's the Spot","Check snorkeling conditions at Waterfall Bay Caves, Tasmania. Fair conditions, water 13.5°C, waves 0.19m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fwaterfall-bay-caves",[243,252],{"@context":244,"@type":245,"name":11,"description":246,"url":241,"geo":247,"address":249},"https:\u002F\u002Fschema.org","Place","Waterfall Bay Caves, centred on the massive Cathedral Cave system on the Tasman Peninsula, is Australia's largest sea cave complex and an extraordinary snorkelling and dive location. Accessed by bo...",{"@type":248,"latitude":13,"longitude":14},"GeoCoordinates",{"@type":250,"addressRegion":236,"addressCountry":251},"PostalAddress","Australia",{"@context":244,"@type":253,"name":254,"description":240,"url":241,"breadcrumb":255},"WebPage","Snorkeling Conditions at Waterfall Bay Caves",{"@context":244,"@type":256,"itemListElement":257},"BreadcrumbList",[258,262,264],{"@type":259,"position":75,"name":260,"item":261},"ListItem","Home","https:\u002F\u002Fhowsthespot.com",{"@type":259,"position":179,"name":236,"item":263},"https:\u002F\u002Fhowsthespot.com\u002Fexplore?region=tasmania",{"@type":259,"position":192,"name":11,"item":241},[266,268,270],{"label":260,"href":267},"\u002F",{"label":236,"href":269},"\u002Fexplore?region=tasmania",{"label":11,"href":271},"\u002Fspots\u002Fwaterfall-bay-caves",1790924521381]