[{"data":1,"prerenderedAt":191},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-blowhole-lady-julia-percy-island":9,"spot-blowhole-lady-julia-percy-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 Blowhole (Lady Julia Percy Island) - How's the Spot","Check snorkeling conditions at Blowhole (Lady Julia Percy Island), Victoria. Fair conditions, water 14.7°C, waves 1.15m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fblowhole-lady-julia-percy-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","Blowhole (Lady Julia Percy Island)","The Blowhole sits at Thunder Point on the south-east tip of Lady Julia Percy Island — Australia's only offshore volcano and home to the largest Australian fur seal colony in the southern hemisphere...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-38.425871,141.998482,{"@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 Blowhole (Lady Julia Percy 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\u002Fblowhole-lady-julia-percy-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":129,"area_boundary":56,"routes":56,"created_at":137,"updated_at":138,"today_conditions":139,"today_verdict_view":160,"images":187,"submitted_by":188,"region_name":26,"verification_status":190,"verified_at":56,"disputed":145,"verifier_count":5,"last_verified_display_name":56},"56ea6861-3025-4560-bba2-28b699314f63","blowhole-lady-julia-percy-island","The Blowhole sits at Thunder Point on the south-east tip of Lady Julia Percy Island — Australia's only offshore volcano and home to the largest Australian fur seal colony in the southern hemisphere. This advanced dive site features a dramatic 18-metre opening that leads into a magnificent cave system deep beneath the island. When swell conditions are flat and calm, the underwater cave reveals otherworldly basalt formations carved by ancient volcanic activity. Above water, the blowhole blasts streams of seawater skyward; below it, few have ever ventured into the cathedral-like cavern. The island itself (Deen Maar) is culturally sacred to the Eastern Maar and Gunditjmara peoples and is only accessible by boat from Port Fairy.","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],0.003767117911803439,0.010379414476911583,0.17668947913821131,0.039018848963874905,0.130445006141824,0.00378697053647711,0.005128676333857998,0.005185501860527604,0.009597871561039159,0.12983249623107648,0.05434831517310029,0.03328739485655512,0.011419736046018132,0.13735634875604724,0.01230143475723529,[92,93,94,95,96,97,98,99,100,101,102,103,104,105,106],156.45248289695496,280.6431444560874,256.49533474973634,115.78403871995816,42.66890190221762,115.62905247329908,170.21507593781382,245.71621986918896,295.5662828944105,237.89237545883657,250.57719001846147,223.83153455509313,10.608959339045388,113.58831545322278,122.65413510103274,"EOT20","1992-01-01T00:00:00Z",[110,115,119,122,125],{"name":111,"description":112,"severity":113,"season_start":36,"season_end":114},"Swell-dependent access","The Blowhole is only diveable \u002F snorkelable in extremely flat, calm conditions with zero swell. Swell makes the site dangerous and the cave inaccessible.","danger",12,{"name":116,"description":117,"severity":118,"season_start":36,"season_end":114},"Remote offshore location","Lady Julia Percy Island is 8 km offshore in Bass Strait. Emergency rescue is extremely difficult; boat support is mandatory.","warning",{"name":120,"description":121,"severity":113,"season_start":36,"season_end":114},"Cave entanglement risk","The 18-metre underwater cave opening can disorient snorkelers and divers. Strong surge inside the cave system increases risk of entanglement or impact with basalt walls.",{"name":123,"description":124,"severity":118,"season_start":36,"season_end":114},"Strong currents and surge","Bass Strait currents and Southern Ocean swells create unpredictable surge around Thunder Point, especially near the blowhole opening.",{"name":126,"description":127,"severity":128,"season_start":36,"season_end":114},"Cold water temperatures","Southern Ocean waters around the island are cold year-round (10–16°C), increasing risk of hypothermia without proper exposure protection.","caution",{"directions":130,"parking":131,"facilities":132,"fees":135,"access_method":136},"The Blowhole is located on the south-east end of Lady Julia Percy Island, approximately 8 km off the coast of western Victoria. Boat tours and charters depart from Port Fairy (pier\u002Fboat ramp). The island itself is not open to public landing. GPS: -38.425871, 141.998482.","Parking available at Port Fairy boat ramp\u002Fpier area. Arrive early as spaces fill during peak season.",[133,134],"parking","toilets","No fee to view from the water, but boat charter\u002Ftour fees apply. Typical scenic tour rates from Port Fairy operators.","boat","2026-07-27T02:57:52.779924Z","2026-08-04T05:32:31.002515Z",{"verdict":140,"evaluated_at":141,"models":142},"marginal","2026-10-03T02:17:03.340754Z",[143,150,155],{"model_name":144,"is_favourable":145,"value":146,"threshold":147,"unit":148,"operator":149},"Wind Speed",false,12.38,10,"kn","lte",{"model_name":151,"is_favourable":145,"value":152,"threshold":153,"unit":154,"operator":149},"Wave Height",1.15,0.5,"m",{"model_name":156,"is_favourable":145,"value":157,"threshold":40,"unit":158,"operator":159},"Visibility",0.91,"","gte",{"verdict":140,"rating":161,"evaluated_at":141,"generated_at":141,"source":162,"confidence":163,"visibility":166,"parameters":167,"models_passed":36,"models_total":181},"Fair","precomputed",{"level":164,"value":165},"High",100,{"score":157,"rating":56,"confidence":56},[168,169,174,177,183],{"name":151,"value":152,"label":56,"unit":154,"favourable":145,"score":5,"optimal_max":153,"marginal_max":36},{"name":170,"value":171,"label":56,"unit":172,"favourable":145,"score":36,"optimal_max":173,"marginal_max":114},"Swell Period",11.1,"s",8,{"name":144,"value":175,"label":56,"unit":148,"favourable":145,"score":36,"optimal_max":147,"marginal_max":176},12.382260800000001,15,{"name":178,"value":179,"label":56,"unit":180,"favourable":145,"score":5,"optimal_max":181,"marginal_max":182},"Precipitation",21.3,"mm",5,20,{"name":184,"value":56,"label":185,"unit":158,"favourable":186,"score":43,"optimal_max":56,"marginal_max":56},"Tidal Phase","slack",true,[],{"display_name":189},"Daniel","unverified",1791009132579]