[{"data":1,"prerenderedAt":204},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-althorpe-island":9,"spot-althorpe-island":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 Althorpe Island - How's the Spot","Check snorkeling conditions at Althorpe Island, South Australia. Hazardous conditions, water 15.9°C, waves 2.05m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Falthorpe-island","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_althorpe-island_0_48447ec9ae91.jpg",[15,28],{"@context":16,"@type":17,"name":18,"description":19,"url":12,"geo":20,"address":24},"https:\u002F\u002Fschema.org","Place","Althorpe Island","Althorpe Island is a remote and wild granite outcrop rising from the Southern Ocean off the southern tip of Yorke Peninsula, within reach of Dhilba Guuranda-Innes National Park. The island's rugged...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-35.372008,136.860411,{"@type":25,"addressRegion":26,"addressCountry":27},"PostalAddress","South Australia","Australia",{"@context":16,"@type":29,"name":30,"description":11,"url":12,"breadcrumb":31},"WebPage","Snorkeling Conditions at Althorpe Island",{"@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=south-australia",{"@type":35,"position":43,"name":18,"item":12},3,[45,47,49],{"label":37,"href":46},"\u002F",{"label":26,"href":48},"\u002Fexplore?region=south-australia",{"label":18,"href":50},"\u002Fspots\u002Falthorpe-island",{"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":135,"area_boundary":118,"routes":118,"created_at":143,"updated_at":144,"today_conditions":145,"today_verdict_view":167,"images":195,"submitted_by":201,"region_name":26,"verification_status":203,"verified_at":118,"disputed":158,"verifier_count":5,"last_verified_display_name":118},"5c6ea9e0-941d-4c9e-bd8d-7d6dd506ae90","althorpe-island","Althorpe Island is a remote and wild granite outcrop rising from the Southern Ocean off the southern tip of Yorke Peninsula, within reach of Dhilba Guuranda-Innes National Park. The island's rugged coastline is dominated by Seal Cove, a spectacular snorkeling site that teems with a large colony of Australian fur seals. The crystal-clear waters around the island also host big rays, blue groper, boarfish, and crayfish among boulder-strewn reefs and kelp forests. Access is exclusively by boat tour from Marion Bay, making this an unforgettable adventure for experienced ocean-goers seeking untamed marine encounters.","advanced","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],0.006326216390465131,0.011053362094899167,0.1953643252091134,0.03617696677269259,0.14855420677801717,0.0004510318142123285,0.008152376184734089,0.008791252168445939,0.010191651226305807,0.13679824759374404,0.05498266223152975,0.034181971804130795,0.017260172207764685,0.15329180913392845,0.015912092639697062,[91,92,93,94,95,96,97,98,99,100,101,102,103,104,105],172.60398693075797,274.194016180057,254.62259570138718,168.88723343027368,120.20095901073368,315.15604686706837,121.09827436290128,252.6007511902236,192.12126621646297,238.28105108929805,255.3236209303094,222.95724007988872,5.241691404542961,160.5650247373435,162.64517085972125,"EOT20","1992-01-01T00:00:00Z",[109,115,119,122,126,129,132],{"name":110,"description":111,"severity":112,"season_start":113,"season_end":114},"Strong ocean swells","Exposed Southern Ocean location means significant swell and surge around the island, especially on windy days.","warning",6,9,{"name":116,"description":117,"severity":112,"season_start":118,"season_end":118},"Remote location","Althorpe Island is 4.5 nautical miles offshore with no on-site facilities. Emergency evacuation is difficult.",null,{"name":120,"description":121,"severity":112,"season_start":113,"season_end":114},"Strong currents","Tidal flows and ocean currents can be powerful around the island's points and coves.",{"name":123,"description":124,"severity":125,"season_start":118,"season_end":118},"Marine wildlife interaction","Large colonies of Australian fur seals are curious and protective — maintain respectful distance.","caution",{"name":127,"description":128,"severity":112,"season_start":118,"season_end":118},"Ocean swell and surge","Open ocean site with significant surge around the rocky cove; swell can make entry and exit hazardous.",{"name":130,"description":131,"severity":112,"season_start":118,"season_end":118},"Tidal currents","Strong tidal currents sweep around Althorpe Island, particularly between the island and the mainland.",{"name":133,"description":134,"severity":125,"season_start":118,"season_end":118},"Protective fur seal colony","Seal Cove is home to a large colony of Australian fur seals; they are curious and may approach closely — maintain distance to avoid defensive behaviour.",{"directions":136,"parking":137,"facilities":138,"fees":141,"access_method":142},"Althorpe Island lies 4.5 nautical miles southwest of Marion Bay on the southern tip of Yorke Peninsula. Access is by chartered boat tour only — Marion Bay Ocean Safari runs the Althorpe Island Experience from Marion Bay, departing from the boat ramp near Dhilba Guuranda-Innes National Park.","Parking available at the Marion Bay boat ramp or within Dhilba Guuranda-Innes National Park (entry fees apply for the park).",[139,140],"parking","boat_ramp","Tour fees apply for the Althorpe Island Experience with Marion Bay Ocean Safari. National park entry fees also apply for Dhilba Guuranda-Innes National Park.","snorkel_tour","2026-07-27T02:57:19.115432Z","2026-08-04T05:32:31.002663Z",{"verdict":146,"evaluated_at":147,"models":148},"no_go","2026-10-03T02:17:11.481294Z",[149,156,162],{"model_name":150,"is_favourable":151,"value":152,"threshold":153,"unit":154,"operator":155},"Wind Speed",true,6.98,10,"kn","lte",{"model_name":157,"is_favourable":158,"value":159,"threshold":160,"unit":161,"operator":155},"Wave Height",false,2.05,0.5,"m",{"model_name":163,"is_favourable":158,"value":164,"threshold":40,"unit":165,"operator":166},"Visibility",0.99,"","gte",{"verdict":146,"rating":168,"evaluated_at":147,"generated_at":147,"source":169,"confidence":170,"visibility":173,"parameters":174,"models_passed":36,"models_total":190},"Hazardous","precomputed",{"level":171,"value":172},"High",100,{"score":164,"rating":118,"confidence":118},[175,177,183,186,192],{"name":157,"value":176,"label":118,"unit":161,"favourable":158,"score":5,"optimal_max":160,"marginal_max":36},2.0502383093914522,{"name":178,"value":179,"label":118,"unit":180,"favourable":158,"score":36,"optimal_max":181,"marginal_max":182},"Swell Period",10.35,"s",8,12,{"name":150,"value":184,"label":118,"unit":154,"favourable":151,"score":43,"optimal_max":153,"marginal_max":185},6.980450256635049,15,{"name":187,"value":188,"label":118,"unit":189,"favourable":158,"score":36,"optimal_max":190,"marginal_max":191},"Precipitation",11.4,"mm",5,20,{"name":193,"value":118,"label":194,"unit":165,"favourable":158,"score":36,"optimal_max":118,"marginal_max":118},"Tidal Phase","ebb",[196],{"id":197,"image_url":13,"sort_order":5,"is_primary":151,"moderation_status":198,"license":199,"license_url":200,"attribution":118,"author_name":118},"af00d83c-0d49-4c10-abc5-cfe178cba766","approved","CC BY-SA 3.0","https:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F3.0\u002F",{"display_name":202},"Daniel","unverified",1791009125461]