[{"data":1,"prerenderedAt":219},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-marmion-marine-park-reefs-ledges-swim-throughs":9,"spot-marmion-marine-park-reefs-ledges-swim-throughs":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 Marmion Marine Park - How's the Spot","Check snorkeling conditions at Marmion Marine Park, Western Australia. Fair conditions, water 19.3°C, waves 0.96m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fmarmion-marine-park-reefs-ledges-swim-throughs","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_marmion-marine-park-reefs-ledges-swim-throughs_0_b2bb6d1089a5.jpg",[15,28],{"@context":16,"@type":17,"name":18,"description":19,"url":12,"geo":20,"address":24},"https:\u002F\u002Fschema.org","Place","Marmion Marine Park","Just north of Perth, Marmion Marine Park is a snorkelling and diving playground of submerged limestone reefs, intricate ledges, caves, and swim-through channels set in crystal-clear lagoons. The pa...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-31.850226,115.751406,{"@type":25,"addressRegion":26,"addressCountry":27},"PostalAddress","Western Australia","Australia",{"@context":16,"@type":29,"name":30,"description":11,"url":12,"breadcrumb":31},"WebPage","Snorkeling Conditions at Marmion Marine Park",{"@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=western-australia",{"@type":35,"position":43,"name":18,"item":12},3,[45,47,49],{"label":37,"href":46},"\u002F",{"label":26,"href":48},"\u002Fexplore?region=western-australia",{"label":18,"href":50},"\u002Fspots\u002Fmarmion-marine-park-reefs-ledges-swim-throughs",{"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":144,"area_boundary":118,"routes":118,"created_at":153,"updated_at":154,"today_conditions":155,"today_verdict_view":177,"images":202,"submitted_by":216,"region_name":26,"verification_status":218,"verified_at":118,"disputed":168,"verifier_count":5,"last_verified_display_name":118},"93750bf5-2064-46dd-8198-f2ee5bc80ec3","marmion-marine-park-reefs-ledges-swim-throughs","Just north of Perth, Marmion Marine Park is a snorkelling and diving playground of submerged limestone reefs, intricate ledges, caves, and swim-through channels set in crystal-clear lagoons. The park stretches from Trigg Island to Burns Beach, with easy shore access at Mettams Pool — a protected nearshore snorkel spot. The reef systems harbour colourful gorgonian corals, and the waters are home to dolphins, sea lions, rays, and seabirds. Between September and December, migrating humpback whales pass through the park. Private dive charters explore offshore sites like Boyinaboat Reef and Wanneroo Reef.","intermediate","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],0.004349365941535819,0.00926741896775185,0.1666072050159385,0.01344304367083093,0.055314134950340516,0.004960114534354051,0.005349492418752834,0.004627878303902165,0.013270664839166953,0.1223946399999975,0.050422269524137565,0.022978820472093663,0.013701882408665931,0.04189887111239728,0.003185717441722617,[91,92,93,94,95,96,97,98,99,100,101,102,103,104,105],32.465438398763304,227.72670912886508,181.79600509759723,41.14901925599287,59.14250614771857,127.84745873268706,36.210051294030364,217.53243682831817,104.15965933221861,175.95879501515287,171.12388371159034,172.82430128822807,318.29751286006194,65.03368873326534,220.8471923124807,"EOT20","1992-01-01T00:00:00Z",[109,115,119,122,126,132,135,138,141],{"name":110,"description":111,"severity":112,"season_start":113,"season_end":114},"Swell and surf conditions","Inshore sites can be affected by swell; best snorkelled on calm days with low swell (<1m).","caution",6,8,{"name":116,"description":117,"severity":112,"season_start":118,"season_end":118},"Sharp limestone reef","The limestone reef has sharp edges and crevices; wear reef shoes or fins to avoid cuts.",null,{"name":120,"description":121,"severity":112,"season_start":118,"season_end":118},"Boat traffic near launch sites","Some inshore areas near Hillarys Boat Harbour and Ocean Reef may see boat traffic. Stay aware in marked channels.",{"name":123,"description":124,"severity":112,"season_start":125,"season_end":125},"Stinger jellyfish (summer months)","Warmer waters from December to March may bring stinger jellyfish near inshore reefs.",12,{"name":127,"description":128,"severity":129,"season_start":130,"season_end":131},"Strong swell and surge","Offshore reefs are exposed to ocean swell and can develop hazardous surge conditions, especially in winter. Many sites should only be accessed in good weather.","warning",5,9,{"name":133,"description":134,"severity":112,"season_start":118,"season_end":118},"Boat traffic","The offshore reefs are popular with dive charters, fishing boats and recreational vessels. Snorkellers need to stay vigilant and use a dive flag or SMB.",{"name":136,"description":137,"severity":112,"season_start":130,"season_end":131},"Strong currents","Oceanic swells and tidal flows can create moderate currents, particularly near reef channels and the outer reef ledges.",{"name":139,"description":140,"severity":129,"season_start":113,"season_end":114},"Swell and Surge","Exposed limestone reefs can experience significant ocean swell and surge, particularly in winter (June to August), creating strong water movement around ledges and swim-throughs.",{"name":142,"description":143,"severity":112,"season_start":118,"season_end":118},"Strong Afternoon Sea Breezes","Summer sea breezes can create challenging surface conditions for snorkellers returning to shore.",{"directions":145,"parking":146,"facilities":147,"fees":151,"access_method":152},"20-minute drive north of Perth city centre. Head to Marmion Avenue and turn west towards the coast. The main shore-access snorkel spot is Mettams Pool, located at the southern end of the marine park near Trigg Island. Hillarys Boat Harbour offers boat-launch facilities and private dive charter departures.","Free car parking available at Mettams Pool car park (off West Coast Drive) and at Hillarys Boat Harbour. Street parking along West Coast Drive near beach access points.",[148,149,150],"parking","toilets","showers","No entry fee for the marine park. 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