[{"data":1,"prerenderedAt":259},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-shoalwater-islands-marine-park-reefs":9,"spot-shoalwater-islands-marine-park-reefs":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 Shoalwater Islands Marine Park (reefs) - How's the Spot","Check snorkeling conditions at Shoalwater Islands Marine Park (reefs), Western Australia. Fair conditions, water 19.0°C, waves 0.94m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fshoalwater-islands-marine-park-reefs","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_shoalwater-islands-marine-park-reefs_0_2def814d88ee.jpg",[15,28],{"@context":16,"@type":17,"name":18,"description":19,"url":12,"geo":20,"address":24},"https:\u002F\u002Fschema.org","Place","Shoalwater Islands Marine Park (reefs)","Shoalwater Islands Marine Park, just 40 minutes south of Perth, protects a stunning chain of limestone islands fringed by cavernous reef systems teeming with marine life. The reefs surrounding Peng...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-32.302921,115.701991,{"@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 Shoalwater Islands Marine Park (reefs)",{"@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\u002Fshoalwater-islands-marine-park-reefs",{"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":166,"area_boundary":129,"routes":129,"created_at":177,"updated_at":178,"today_conditions":179,"today_verdict_view":201,"images":228,"submitted_by":256,"region_name":26,"verification_status":258,"verified_at":129,"disputed":192,"verifier_count":5,"last_verified_display_name":129},"9f495c7d-965f-47e5-8abb-752345771206","shoalwater-islands-marine-park-reefs","Shoalwater Islands Marine Park, just 40 minutes south of Perth, protects a stunning chain of limestone islands fringed by cavernous reef systems teeming with marine life. The reefs surrounding Penguin, Seal, and Shag islands offer crystal-clear shallow snorkeling among limestone bommies, sponge gardens, and seagrass beds. This unique park is one of the few places in the world where you can snorkel alongside wild Australian sea lions in their natural habitat, while the waters also host dolphins, rays, and countless reef fish. The sheltered western sides of the islands provide calm conditions perfect for exploring the underwater labyrinth of gutters and caves.","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],0.004138255641140625,0.009100934676354215,0.16712810092975103,0.014615285462913732,0.05287839209855107,0.004532580355073513,0.0043761610059752445,0.004658670296748399,0.01395122398217303,0.12144491362904936,0.05124507917871472,0.023338793184845205,0.012680799720642446,0.0411397135029236,0.00262858239039233,[91,92,93,94,95,96,97,98,99,100,101,102,103,104,105],51.440990170955466,224.07046495493967,181.38993203477355,34.1184239872897,57.3134776224858,139.95715412737724,28.57387552934816,232.08145044492517,108.19639413611452,175.70225030214988,170.9042552168189,172.95596287067735,321.16277221407677,61.83143503496228,245.3368145548592,"EOT20","1992-01-01T00:00:00Z",[109,114,118,122,126,130,133,136,139,142,145,148,151,154,157,160,163],{"name":110,"description":111,"severity":112,"season_start":36,"season_end":113},"Strong tidal currents around sandbar","Strong currents occur on the sandbar crossing between the mainland and Penguin Island. People have drowned attempting to cross. Only cross at low tide with local knowledge.","danger",12,{"name":115,"description":116,"severity":117,"season_start":36,"season_end":113},"Changing water depth on sandbar","Water depth and flow can change rapidly on the Penguin Island sandbar crossing, catching visitors off guard.","warning",{"name":119,"description":120,"severity":121,"season_start":36,"season_end":113},"Boat traffic in marine park channels","Tour boats and private vessels operate in the narrow channels between islands. Snorkelers in open water should stay alert and be visible.","caution",{"name":123,"description":124,"severity":121,"season_start":125,"season_end":125},"Box jellyfish (stinger season)","Warmer months (Nov to Apr) may bring occasional box jellyfish and other stingers to protected waters.",11,{"name":127,"description":128,"severity":117,"season_start":129,"season_end":129},"Unpredictable sea lions","Australian sea lions are wild animals that may bite if approached too closely; maintain a safe distance.",null,{"name":131,"description":132,"severity":121,"season_start":36,"season_end":113},"Boat traffic","General use zones allow recreational and commercial vessels; stay vigilant when snorkeling near channels.",{"name":134,"description":135,"severity":121,"season_start":129,"season_end":129},"Strong winds and currents","South-westerly winds can pick up suddenly, creating choppy conditions around the exposed islands and reefs.",{"name":137,"description":138,"severity":121,"season_start":129,"season_end":129},"Sharp reef cuts","Walking on or touching the limestone reef can cause cuts and injuries; wear protective footwear and avoid standing on live coral.",{"name":140,"description":141,"severity":117,"season_start":129,"season_end":129},"Strong tidal currents around channels","Tidal flows can create strong currents between islands, especially at Penguin Island and the causeway area.",{"name":143,"description":144,"severity":121,"season_start":129,"season_end":129},"Bluebottle jellyfish","Bluebottle jellyfish can drift into the shallow reef zones during warmer months.",{"name":146,"description":147,"severity":117,"season_start":36,"season_end":113},"Strong currents around island channels","Tidal currents can run swiftly through the passages between islands, particularly between Penguin Island and the mainland.",{"name":149,"description":150,"severity":121,"season_start":129,"season_end":129},"Stinger jellyfish","Box jellyfish and other stingers may be present in warmer months (November to April).",{"name":152,"description":153,"severity":121,"season_start":36,"season_end":113},"Sharp limestone reef","The cavernous limestone reefs have sharp edges and crevices. Reef shoes are recommended to avoid cuts, and care is needed to avoid damaging the fragile reef ecosystem.",{"name":155,"description":156,"severity":117,"season_start":129,"season_end":129},"Swell and surge on outer reef","Limestone reef creates surge and dumping waves on the outer reef in swells above 1 m. Advanced snorkelers only beyond the yellow marine buoy.",{"name":158,"description":159,"severity":112,"season_start":129,"season_end":129},"Penguin Island sandbar rips and currents","Water depth and currents change rapidly over the Penguin Island sandbar. Multiple drownings recorded. Use the ferry service — do not attempt to wade or swim across.",{"name":161,"description":162,"severity":117,"season_start":129,"season_end":129},"Sharks in open water","Open water beyond Point Peron's outer reef (7+ m depth, up to 1 km offshore) is frequented by hammerhead sharks, bronze whalers, and bull sharks.",{"name":164,"description":165,"severity":121,"season_start":129,"season_end":129},"Vehicle break-ins","Opportunistic thieves target parked vehicles. Leave no valuables in your car.",{"directions":167,"parking":168,"facilities":169,"fees":175,"access_method":176},"From Perth, take the Kwinana Freeway south to Rockingham. Turn onto Penguin Road following signs to Penguin Island and Mersey Point. The main departure point for snorkel tours is from the Shoalwater Bay foreshore near the Penguin Island ferry terminal at 153 Arcadia Drive, Shoalwater.","Paid parking is available at the Mersey Point carpark on Arcadia Drive, Shoalwater. The lot fills quickly on weekends and during peak summer season (December-February).",[170,171,172,173,174],"toilets","parking","showers","picnic_tables","drinking_water","Marine park entry is free. Snorkel tours with sea lions typically cost $85-$130 per person. 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