[{"data":1,"prerenderedAt":194},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-glennie-group-great-glennie-island-dannevig-island-citadel-island-mchugh-island":9,"spot-glennie-group-great-glennie-island-dannevig-island-citadel-island-mchugh-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 Glennie Group (Great Glennie Island, Dannevig Island, Citadel Island, McHugh Island) - How's the Spot","Check snorkeling conditions at Glennie Group (Great Glennie Island, Dannevig Island, Citadel Island, McHugh Island), Victoria. Fair conditions, water 13.9°C,...","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fglennie-group-great-glennie-island-dannevig-island-citadel-island-mchugh-island","https:\u002F\u002Fhowsthespot.com\u002Fog-default.png",[15,28],{"@context":16,"@type":17,"name":18,"description":19,"url":12,"geo":20,"address":24},"https:\u002F\u002Fschema.org","Place","Glennie Group (Great Glennie Island, Dannevig Island, Citadel Island, McHugh Island)","The Glennie Group is a remote cluster of granite islands lying off the southern coast of Wilsons Promontory in Victoria's Gippsland region. Great Glennie Island, Dannevig Island, Citadel Island, an...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-39.1,146.9,{"@type":25,"addressRegion":26,"addressCountry":27},"PostalAddress","Victoria","Australia",{"@context":16,"@type":29,"name":30,"description":11,"url":12,"breadcrumb":31},"WebPage","Snorkeling Conditions at Glennie Group (Great Glennie Island, Dannevig Island, Citadel Island, McHugh 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=victoria",{"@type":35,"position":43,"name":18,"item":12},3,[45,47,49],{"label":37,"href":46},"\u002F",{"label":26,"href":48},"\u002Fexplore?region=victoria",{"label":18,"href":50},"\u002Fspots\u002Fglennie-group-great-glennie-island-dannevig-island-citadel-island-mchugh-island",{"id":52,"name":18,"slug":53,"latitude":22,"longitude":23,"description":54,"difficulty":55,"image_url":56,"status":57,"tide_constituents":58,"hazard_entries":109,"access_info_structured":133,"area_boundary":56,"routes":56,"created_at":142,"updated_at":143,"today_conditions":144,"today_verdict_view":165,"images":190,"submitted_by":191,"region_name":26,"verification_status":193,"verified_at":56,"disputed":150,"verifier_count":5,"last_verified_display_name":56},"7e9a8298-757d-4a9d-a032-9f715212aa5a","glennie-group-great-glennie-island-dannevig-island-citadel-island-mchugh-island","The Glennie Group is a remote cluster of granite islands lying off the southern coast of Wilsons Promontory in Victoria's Gippsland region. Great Glennie Island, Dannevig Island, Citadel Island, and McHugh Island rise from the Bass Strait with windswept cliffs, rocky shorelines, and sheltered coves. These exposed waters are only accessible by private vessel in calm conditions, offering adventurous snorkelers the chance to explore pristine granite boulder gardens, kelp forests, and clear temperate waters. The isolation rewards those who make the journey with wild, untouched seascapes and stellar visibility on a good day.","advanced",null,"published",{"name":59,"amplitude":75,"phase":91,"latitude":22,"model":107,"epoch":108},[60,61,62,63,64,65,66,67,68,69,70,71,72,73,74],"2N2","J1","K1","K2","M2","M4","MF","MM","N2","O1","P1","Q1","S1","S2","T2",[76,77,78,79,80,81,82,83,84,85,86,87,88,89,90],0.02537088323961284,0.012532196647862513,0.21792916738906706,0.03429653419850829,0.6333052006729408,0.005870376226125221,0.006939953502152617,0.005006727483366509,0.16226290526513756,0.14101252669330713,0.06972695291231412,0.033853009185424734,0.008860011966888412,0.1251681608647261,0.010320985761761279,[92,93,94,95,96,97,98,99,100,101,102,103,104,105,106],322.62193135011205,330.06932390695476,302.6275259860396,225.91213993162918,32.94068656941606,226.98234187642646,199.15944608521005,242.5428283211293,0.36432670696363345,276.63027693993354,298.897695448124,260.05814283962997,18.09859495591356,214.56882120359694,191.54740240072093,"EOT20","1992-01-01T00:00:00Z",[110,115,121,124,130],{"name":111,"description":112,"severity":113,"season_start":36,"season_end":114},"Strong ocean currents","Bass Strait currents funnel between the islands, creating powerful and unpredictable flows that can quickly sweep swimmers out to sea.","danger",12,{"name":116,"description":117,"severity":118,"season_start":119,"season_end":120},"Swell and surge","Exposed to Southern Ocean and Bass Strait swells; large waves and surging water around rocky shorelines make entries and exits hazardous.","warning",6,9,{"name":122,"description":123,"severity":118,"season_start":36,"season_end":114},"Variable weather","Rapidly changing conditions with strong winds, fog, and rough seas can strand visitors; only attempt in settled weather windows.",{"name":125,"description":126,"severity":127,"season_start":128,"season_end":129},"Cold water temperatures","Temperate Bass Strait waters range from 11-16°C year-round, posing hypothermia risk without adequate thermal protection.","caution",5,10,{"name":131,"description":132,"severity":118,"season_start":36,"season_end":114},"Remote location","No facilities, emergency services, or regular vessel traffic; self-sufficiency and safety equipment are essential.",{"directions":134,"parking":135,"facilities":136,"fees":140,"access_method":141},"The Glennie Group is located approximately 15-20 km south of Wilsons Promontory in Bass Strait, Victoria. Access is by private boat only—launch from Tidal River or Yanakie on the Victorian mainland. A 4-5 meter swell forecast window and calm winds are mandatory. No public ferries run to the islands.","Park at the boat ramp at Tidal River (within Wilsons Promontory National Park) or Yanakie boat ramp. Both require a national park day pass or camping permit.",[137,138,139],"toilets","parking","boat_ramp","Wilsons Promontory National Park entry fee applies for vehicle access (approx. AUD 13 per vehicle per day). No additional fee for the islands themselves.","boat","2026-07-27T02:58:20.674549Z","2026-08-04T05:34:24.990679Z",{"verdict":145,"evaluated_at":146,"models":147},"marginal","2026-10-03T02:17:53.041806Z",[148,154,160],{"model_name":149,"is_favourable":150,"value":151,"threshold":129,"unit":152,"operator":153},"Wind Speed",false,11.32,"kn","lte",{"model_name":155,"is_favourable":156,"value":157,"threshold":158,"unit":159,"operator":153},"Wave Height",true,0.24,0.5,"m",{"model_name":161,"is_favourable":150,"value":162,"threshold":40,"unit":163,"operator":164},"Visibility",0.99,"","gte",{"verdict":145,"rating":166,"evaluated_at":146,"generated_at":146,"source":167,"confidence":168,"visibility":171,"parameters":172,"models_passed":36,"models_total":128},"Fair","precomputed",{"level":169,"value":170},"High",100,{"score":162,"rating":56,"confidence":56},[173,174,179,182,187],{"name":155,"value":157,"label":56,"unit":159,"favourable":156,"score":43,"optimal_max":158,"marginal_max":36},{"name":175,"value":176,"label":56,"unit":177,"favourable":150,"score":36,"optimal_max":178,"marginal_max":114},"Swell Period",11.2,"s",8,{"name":149,"value":180,"label":56,"unit":152,"favourable":150,"score":36,"optimal_max":129,"marginal_max":181},11.322868,15,{"name":183,"value":184,"label":56,"unit":185,"favourable":150,"score":5,"optimal_max":128,"marginal_max":186},"Precipitation",25.3,"mm",20,{"name":188,"value":56,"label":189,"unit":163,"favourable":150,"score":36,"optimal_max":56,"marginal_max":56},"Tidal Phase","flood",[],{"display_name":192},"Daniel","unverified",1791009155269]