[{"data":1,"prerenderedAt":266},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-boullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail":9,"spot-boullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail":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 Boullanger Island (Jurien Bay Underwater Interpretive Snorkel and Dive Trail) - How's the Spot","Check snorkeling conditions at Boullanger Island (Jurien Bay Underwater Interpretive Snorkel and Dive Trail), Western Australia. Hazardous conditions, water...","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fboullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_boullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail_0_a619ea861de5.jpg",[15,28],{"@context":16,"@type":17,"name":18,"description":19,"url":12,"geo":20,"address":24},"https:\u002F\u002Fschema.org","Place","Boullanger Island (Jurien Bay Underwater Interpretive Snorkel and Dive Trail)","Boullanger Island lies just one kilometre offshore from Island Point at the southern end of Jurien Bay Marine Park, its shallow western flank a sun-dappled seagrass meadow perfect for family snorke...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-30.316565,115.002854,{"@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 Boullanger Island (Jurien Bay Underwater Interpretive Snorkel and Dive Trail)",{"@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\u002Fboullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail",{"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":188,"area_boundary":113,"routes":113,"created_at":198,"updated_at":199,"today_conditions":200,"today_verdict_view":221,"images":246,"submitted_by":263,"region_name":26,"verification_status":265,"verified_at":113,"disputed":212,"verifier_count":5,"last_verified_display_name":113},"773842fa-73b6-4fc8-8914-512d1647cfd2","boullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail","Boullanger Island lies just one kilometre offshore from Island Point at the southern end of Jurien Bay Marine Park, its shallow western flank a sun-dappled seagrass meadow perfect for family snorkelling. The Jurien Bay Underwater Interpretive Snorkel and Dive Trail weaves through water 2.5 to 6 metres deep past an artificial reef of over 70 reef balls, designed to mimic natural limestone systems and teeming with marine life. The island's sheltered lee offers calm, protected waters while the surrounding marine park — the only major Australian sea lion breeding colony on the west coast — provides an extraordinary backdrop of limestone reefs, caves, and grottos draped in colourful sponges and sea squirts.","beginner","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],0.0015983062611077846,0.009036996289703923,0.17193094099419287,0.01695845187088796,0.055178349019157975,0.004411425962866041,0.006656740504464165,0.004671285906162374,0.012902188436137113,0.1227914987024948,0.04681682772520223,0.026962622135220146,0.016401596191446474,0.041174196632602134,0.001760550483991272,[91,92,93,94,95,96,97,98,99,100,101,102,103,104,105],39.27738100924702,223.71174294994114,180.17828020261595,43.17730869317262,59.93203981441292,150.91104902238624,48.45145763782847,192.44967542363764,92.00654202317844,175.1628719981478,170.22062858869808,171.777301099684,4.994414615238412,70.12557334415735,342.44801414141887,"EOT20","1992-01-01T00:00:00Z",[109,114,117,120,126,129,132,136,139,142,146,149,152,155,158,161,164,167,171,176,179,182,185],{"name":110,"description":111,"severity":112,"season_start":113,"season_end":113},"Boat traffic","The island is accessed by boat and sits in a busy marine park frequented by recreational vessels. Snorkellers should stay vigilant and surface with care.","caution",null,{"name":115,"description":116,"severity":112,"season_start":113,"season_end":113},"Strong sea breezes","Afternoon south-westerly sea breezes can chop up the water surface and reduce visibility, particularly during summer afternoons.",{"name":118,"description":119,"severity":112,"season_start":113,"season_end":113},"Sharp limestone reef","Exposed limestone reef edges and bommies can cause cuts and scrapes. Wear protective footwear and avoid touching the reef.",{"name":121,"description":122,"severity":123,"season_start":124,"season_end":125},"Open ocean swells","Exposed position offshore can experience moderate to large swells, especially in winter months (June–August).","warning",6,8,{"name":127,"description":128,"severity":123,"season_start":113,"season_end":113},"Strong currents","Oceanic currents can sweep around the island and over bommies; strong swimming ability required.",{"name":130,"description":131,"severity":112,"season_start":113,"season_end":113},"Sharp coral","The bommies are live coral formations with sharp edges; contact can cause cuts.",{"name":133,"description":134,"severity":112,"season_start":36,"season_end":135},"Afternoon sea breeze chop","Summer sea breezes can create choppy conditions and surge around the island's exposed western side, making navigation and snorkeling more challenging in the afternoon.",12,{"name":137,"description":138,"severity":123,"season_start":36,"season_end":135},"Tidal currents around island points","Strong outflow currents can develop around the island's southern and western points during tidal changes, particularly on larger tide movements.",{"name":140,"description":141,"severity":112,"season_start":113,"season_end":113},"Marine wildlife interaction regulations","Strict guidelines apply: maintain distance, do not touch sea lions, and never land on islands occupied by sea lions. Fines apply for non-compliance.",{"name":143,"description":144,"severity":112,"season_start":145,"season_end":135},"Wind and swell conditions","Afternoon sea breezes can create choppy water and reduced visibility. Early morning tours are recommended for calmest conditions.",9,{"name":147,"description":148,"severity":112,"season_start":124,"season_end":125},"Cold water temperatures","Water temperatures range 18–23°C year-round. Wetsuits are provided by tour operators but cold shock is a risk for unprepared swimmers, especially in winter (June–August).",{"name":150,"description":151,"severity":112,"season_start":124,"season_end":145},"Strong currents around island points","Tidal currents can pick up around the rocky points of the island, particularly during tidal changes.",{"name":153,"description":154,"severity":123,"season_start":113,"season_end":113},"Limited access \u002F remote location","No direct shore access from the mainland. Snorkelers must arrive by boat or kayak, so self-rescue options are limited.",{"name":156,"description":157,"severity":112,"season_start":113,"season_end":113},"Sharp reef and rocky shore","The island's fringing reef and rocky coastline have sharp limestone and coral edges; reef shoes or fins are strongly recommended.",{"name":159,"description":160,"severity":112,"season_start":113,"season_end":113},"Currents in channels","Tidal currents can run through passages between islands in the marine park; check conditions before crossing.",{"name":162,"description":163,"severity":112,"season_start":113,"season_end":113},"Marine stingers","Box jellyfish and other marine stingers may be present during warmer months (November to April).",{"name":165,"description":166,"severity":112,"season_start":113,"season_end":113},"Marine park zone restrictions","Certain areas have restrictions on spearfishing, crabbing, and netting. Check signage and know your zones before entering.",{"name":168,"description":169,"severity":112,"season_start":170,"season_end":145},"Weather-dependent conditions","Tours and access run subject to weather. Wind and swell can affect water clarity and safety, particularly on the exposed sides of the island.",5,{"name":172,"description":173,"severity":112,"season_start":174,"season_end":175},"Wind chop \u002F swell","The western side is sheltered but conditions can change quickly with sea breezes; afternoon chop reduces visibility.",4,10,{"name":177,"description":178,"severity":123,"season_start":113,"season_end":113},"Strong currents around points","Tidal currents can pick up around the island's northern and southern points, especially on outgoing tides.",{"name":180,"description":181,"severity":112,"season_start":113,"season_end":113},"Interpretive Trail Buried in Sand","The Jurien Bay Underwater Interpretive Snorkel and Dive Trail (near the old jetty) is reported to be covered with sand. Visitors should not rely on finding marked trail plaques.",{"name":183,"description":184,"severity":112,"season_start":113,"season_end":113},"Remote Island Access","Small boat\u002Fwatercraft required to reach the island; no bridge access. Snorkellers should be competent swimmers and be prepared for open-water conditions outside the protected lagoon.",{"name":186,"description":187,"severity":112,"season_start":113,"season_end":113},"Trail may be sand-covered","The interpretive trail markers and reef balls have been periodically covered by shifting sand, reducing navigability of the formal trail.",{"directions":189,"parking":190,"facilities":191,"fees":196,"access_method":197},"Boullanger Island is located 1 km offshore from Island Point at the southern end of Jurien Bay, approximately 2.5 hours north of Perth via Indian Ocean Drive. No direct road access to the island; access is by boat, kayak, or guided snorkel tour from Jurien Bay.","Parking available at the Jurien Bay boat ramp and marina precinct, and at Island Point lookout area. Can be crowded during summer and Easter holidays.",[192,193,194,195],"toilets","parking","boat_ramp","picnic_tables","No fee for snorkelling the site itself. Guided tours from Jurien Bay start from approximately $115 per person. Snorkel trail swim cards available from local shops for a $5 donation.","boat","2026-07-27T02:58:52.202225Z","2026-08-04T05:34:24.990641Z",{"verdict":201,"evaluated_at":202,"models":203},"no_go","2026-10-03T02:17:45.646704Z",[204,210,216],{"model_name":205,"is_favourable":206,"value":207,"threshold":175,"unit":208,"operator":209},"Wind Speed",true,2.44,"kn","lte",{"model_name":211,"is_favourable":212,"value":213,"threshold":214,"unit":215,"operator":209},"Wave Height",false,1.91,0.5,"m",{"model_name":217,"is_favourable":212,"value":218,"threshold":40,"unit":219,"operator":220},"Visibility",1.65,"","gte",{"verdict":201,"rating":222,"evaluated_at":202,"generated_at":202,"source":223,"confidence":224,"visibility":227,"parameters":228,"models_passed":40,"models_total":170},"Hazardous","precomputed",{"level":225,"value":226},"High",100,{"score":218,"rating":113,"confidence":113},[229,231,235,238,243],{"name":211,"value":230,"label":113,"unit":215,"favourable":212,"score":5,"optimal_max":214,"marginal_max":36},1.9104550355555552,{"name":232,"value":233,"label":113,"unit":234,"favourable":212,"score":36,"optimal_max":125,"marginal_max":135},"Swell Period",11.25,"s",{"name":205,"value":236,"label":113,"unit":208,"favourable":206,"score":43,"optimal_max":175,"marginal_max":237},2.4433705593362665,15,{"name":239,"value":240,"label":113,"unit":241,"favourable":206,"score":43,"optimal_max":170,"marginal_max":242},"Precipitation",2.5,"mm",20,{"name":244,"value":113,"label":245,"unit":219,"favourable":212,"score":36,"optimal_max":113,"marginal_max":113},"Tidal Phase","ebb",[247,254,257,260],{"id":248,"image_url":13,"sort_order":5,"is_primary":206,"moderation_status":249,"license":250,"license_url":251,"attribution":252,"author_name":253},"6ebf8428-1b0f-462c-93d0-28e11b754255","approved","CC BY-SA 4.0","https:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F","Photo by Calistemon","Calistemon",{"id":255,"image_url":256,"sort_order":36,"is_primary":212,"moderation_status":249,"license":250,"license_url":251,"attribution":252,"author_name":253},"ca8ba1fb-b63f-4595-806e-af3857dd6587","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_boullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail_1_15f4dacfdad2.jpg",{"id":258,"image_url":259,"sort_order":40,"is_primary":212,"moderation_status":249,"license":250,"license_url":251,"attribution":252,"author_name":253},"8a6b2ec4-0a59-4952-85a3-d6dc15c89b7b","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_boullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail_2_cc4b708e35d3.jpg",{"id":261,"image_url":262,"sort_order":43,"is_primary":212,"moderation_status":249,"license":250,"license_url":251,"attribution":252,"author_name":253},"cb2fc3a9-3c41-4ca0-9aca-6f9cac473200","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_boullanger-island-jurien-bay-underwater-interpretive-snorkel-and-dive-trail_3_9230f81ca52a.jpg",{"display_name":264},"Daniel","unverified",1791009134582]