[{"data":1,"prerenderedAt":185},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-undertow-bay":9,"spot-undertow-bay":51},{"entries":4,"total":5,"period":6,"type":7,"generated_at":8},[],0,"all_time","reports","2026-10-02T06:59:37.379659Z",{"title":10,"description":11,"canonical_url":12,"og_image":13,"structured_data":14,"breadcrumbs":44},"Snorkeling Conditions at Undertow Bay - How's the Spot","Check snorkeling conditions at Undertow Bay, Victoria. Fair conditions, water 14.6°C, waves 0.96m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fundertow-bay","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","Undertow Bay","Undertow Bay is a 300-metre-long southeast-facing beach tucked next to the town of Cape Paterson on Victoria's Bass Coast, within the Yallock-Bulluk Marine and Coastal Park. Its protected sandy bay...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-38.668,145.578,{"@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 Undertow Bay",{"@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\u002Fundertow-bay",{"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":125,"area_boundary":56,"routes":56,"created_at":132,"updated_at":133,"today_conditions":134,"today_verdict_view":155,"images":181,"submitted_by":182,"region_name":26,"verification_status":184,"verified_at":56,"disputed":146,"verifier_count":5,"last_verified_display_name":56},"7b401c15-b31d-4c2f-aa70-7cb15480b807","undertow-bay","Undertow Bay is a 300-metre-long southeast-facing beach tucked next to the town of Cape Paterson on Victoria's Bass Coast, within the Yallock-Bulluk Marine and Coastal Park. Its protected sandy bay and adjacent rocky reef structure create a haven for kelp forests and cool-temperate marine life, making it a popular shoreline entry snorkel spot for those who time the conditions carefully.","intermediate",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],0.0235145543339627,0.013777943097357245,0.22246239048539973,0.049166198499182905,0.8133973231121304,0.043254898704917416,0.007423330195767513,0.005914991161964258,0.17260902857389235,0.15280781121066125,0.06794846796292621,0.03632932819511623,0.010079278804896787,0.20844446988485818,0.02076988471243677,[92,93,94,95,96,97,98,99,100,101,102,103,104,105,106],313.6890761409269,305.78436605845536,278.485986598913,170.99678814689685,35.725367720299175,152.66614489231517,182.6860221099064,252.51524158787527,358.17189714739965,257.03901193387526,270.2608677870547,247.68214291765696,1.5048325716089437,168.7338839092028,165.08297324438456,"EOT20","1992-01-01T00:00:00Z",[110,116,119],{"name":111,"description":112,"severity":113,"season_start":114,"season_end":115},"Strong surf and swell","The southeast exposure picks up long-period swell and wind chop, making conditions unfavourable at times — especially with southerly winds.","warning",6,8,{"name":117,"description":118,"severity":113,"season_start":56,"season_end":56},"Rip currents","Like many exposed Bass Coast beaches, rip currents can develop, particularly around the rocky headlands flanking the bay.",{"name":120,"description":121,"severity":122,"season_start":123,"season_end":124},"Cold water temperatures","Bass Strait waters are cold year-round (10–16°C), posing a risk of cold shock and hypothermia without proper wetsuit protection.","caution",5,10,{"directions":126,"parking":127,"facilities":128,"fees":130,"access_method":131},"Located immediately east of the town of Cape Paterson, next to the major bend in the main road (Undertow Bay Road). Approximately 2 hours' drive southeast of Melbourne via the M1 and Bass Highway.","Roadside parking available along Undertow Bay Road near the beach access point.",[129],"parking","No fees. The site is within the Yallock-Bulluk Marine and Coastal Park, which is free to enter.","shore_entry","2026-07-27T02:58:22.134279Z","2026-08-04T05:34:24.990659Z",{"verdict":135,"evaluated_at":136,"models":137},"marginal","2026-10-02T02:19:59.879657Z",[138,144,150],{"model_name":139,"is_favourable":140,"value":141,"threshold":124,"unit":142,"operator":143},"Wind Speed",true,5.96,"kn","lte",{"model_name":145,"is_favourable":146,"value":147,"threshold":148,"unit":149,"operator":143},"Wave Height",false,0.956,0.5,"m",{"model_name":151,"is_favourable":146,"value":152,"threshold":40,"unit":153,"operator":154},"Visibility",0.99,"","gte",{"verdict":135,"rating":156,"evaluated_at":136,"generated_at":136,"source":157,"confidence":158,"visibility":161,"parameters":162,"models_passed":36,"models_total":123},"Fair","precomputed",{"level":159,"value":160},"High",100,{"score":152,"rating":56,"confidence":56},[163,165,170,173,178],{"name":145,"value":164,"label":56,"unit":149,"favourable":146,"score":36,"optimal_max":148,"marginal_max":36},0.9564244942836763,{"name":166,"value":167,"label":56,"unit":168,"favourable":146,"score":36,"optimal_max":115,"marginal_max":169},"Swell Period",11.85,"s",12,{"name":139,"value":171,"label":56,"unit":142,"favourable":140,"score":43,"optimal_max":124,"marginal_max":172},5.963480343858983,15,{"name":174,"value":175,"label":56,"unit":176,"favourable":146,"score":36,"optimal_max":123,"marginal_max":177},"Precipitation",19.6,"mm",20,{"name":179,"value":56,"label":180,"unit":153,"favourable":146,"score":36,"optimal_max":56,"marginal_max":56},"Tidal Phase","flood",[],{"display_name":183},"Daniel","unverified",1790924518855]