[{"data":1,"prerenderedAt":204},["ShallowReactive",2],{"leaderboard-total":3,"spot-johns-beach-karratha-back-beach":9,"spot-seo-johns-beach-karratha-back-beach":170},{"entries":4,"total":5,"period":6,"type":7,"generated_at":8},[],0,"all_time","reports","2026-10-03T06:32:05.526386Z",{"id":10,"name":11,"slug":12,"latitude":13,"longitude":14,"description":15,"difficulty":16,"image_url":17,"status":18,"tide_constituents":19,"hazard_entries":70,"access_info_structured":93,"area_boundary":81,"routes":81,"created_at":102,"updated_at":103,"today_conditions":104,"today_verdict_view":124,"images":152,"submitted_by":166,"region_name":168,"verification_status":169,"verified_at":81,"disputed":151,"verifier_count":5,"last_verified_display_name":81},"4173540d-c3c0-4094-9a67-7103cb141ca0","Johns Beach (Karratha Back Beach)","johns-beach-karratha-back-beach",-20.733695,116.844706,"Johns Beach, better known locally as Karratha Back Beach, is a popular shore-entry snorkelling spot on the Pilbara coast. A public boat ramp and jetty provide easy access to the waters of the Dampier Archipelago — the richest marine biodiversity zone in Western Australia. Snorkellers can swim straight off the beach to explore coral patches, sponge gardens, and seagrass beds teeming with over 650 fish species. The beach's sheltered western aspect and sandy entry make it a favourite for families and beginners, while the adjacent reef systems offer more adventurous swimming for experienced snorkellers. Best visited at low tide when clarity improves.","beginner","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_johns-beach-karratha-back-beach_0_46b2f628cf51.jpg","published",{"name":20,"amplitude":36,"phase":52,"latitude":13,"model":68,"epoch":69},[21,22,23,24,25,26,27,28,29,30,31,32,33,34,35],"2N2","J1","K1","K2","M2","M4","MF","MM","N2","O1","P1","Q1","S1","S2","T2",[37,38,39,40,41,42,43,44,45,46,47,48,49,50,51],0.022239772830258436,0.009134948790082188,0.23786874032859096,0.2214919072894389,1.2992423722450201,0.028448668298918497,0.011320842209648947,0.004209635858160399,0.23158984490980278,0.14526296972698038,0.06684174868509768,0.03304176818683429,0.017379717447592914,0.794259818549115,0.03935491147192414,[53,54,55,56,57,58,59,60,61,62,63,64,65,66,67],20.086543008747526,191.0064713531507,173.23713424138307,133.36009453955813,75.42024052172653,16.507946745957952,358.6160126094584,232.84467989377958,47.21849667246789,162.0560767436151,166.31167641931884,157.50321261868362,3.5377137988863296,136.55512497817875,144.62575774028392,"EOT20","1992-01-01T00:00:00Z",[71,77,82,87,90],{"name":72,"description":73,"severity":74,"season_start":75,"season_end":76},"Box jellyfish","Stinging box jellyfish (Chironex fleckeri) may be present during warmer months (Oct-Apr). Wear a stinger suit for protection.","warning",4,10,{"name":78,"description":79,"severity":80,"season_start":81,"season_end":81},"Outgoing tide current","Tidal movement through the bay can create moderate currents on an outgoing tide, especially near the rocky headlands.","caution",null,{"name":83,"description":84,"severity":80,"season_start":85,"season_end":86},"Summer heat","Extreme Pilbara heat (often 40+°C) from November to March makes early-morning snorkelling strongly recommended.",3,11,{"name":88,"description":89,"severity":74,"season_start":81,"season_end":81},"Marine stingers","Box jellyfish and irukandji may be present during the warmer months from November to May.",{"name":91,"description":92,"severity":74,"season_start":81,"season_end":81},"Boat traffic","The public boat ramp and jetty see regular boat launching activity; snorkellers should stay clear of the ramp channel.",{"directions":94,"parking":95,"facilities":96,"fees":100,"access_method":101},"Located on the western edge of Karratha, off Back Beach Road. From the Karratha town centre, follow Dampier Highway west for about 3 km, then turn onto Back Beach Road and continue to the beach carpark.","Sealed carpark with trailer parking (approx. 20 car bays + 20 trailer bays). Also a separate carpark for RVs and caravans.",[97,98,99],"toilets","parking","boat_ramp","Free entry and parking.","shore_entry","2026-07-27T02:59:34.236693Z","2026-08-04T05:32:31.002357Z",{"verdict":105,"evaluated_at":106,"models":107},"go","2026-10-03T02:16:35.669218Z",[108,114,119],{"model_name":109,"is_favourable":110,"value":111,"threshold":76,"unit":112,"operator":113},"Wind Speed",true,1.43,"kn","lte",{"model_name":115,"is_favourable":110,"value":116,"threshold":117,"unit":118,"operator":113},"Wave Height",0.1,0.5,"m",{"model_name":120,"is_favourable":110,"value":85,"threshold":121,"unit":122,"operator":123},"Visibility",2,"","gte",{"verdict":105,"rating":125,"evaluated_at":106,"generated_at":106,"source":126,"confidence":127,"visibility":130,"parameters":131,"models_passed":75,"models_total":146},"Excellent","precomputed",{"level":128,"value":129},"High",100,{"score":85,"rating":81,"confidence":81},[132,134,140,143,148],{"name":115,"value":116,"label":81,"unit":118,"favourable":110,"score":85,"optimal_max":117,"marginal_max":133},1,{"name":135,"value":136,"label":81,"unit":137,"favourable":110,"score":85,"optimal_max":138,"marginal_max":139},"Swell Period",2.55,"s",8,12,{"name":109,"value":141,"label":81,"unit":112,"favourable":110,"score":85,"optimal_max":76,"marginal_max":142},1.4287224,15,{"name":144,"value":5,"label":81,"unit":145,"favourable":110,"score":85,"optimal_max":146,"marginal_max":147},"Precipitation","mm",5,20,{"name":149,"value":81,"label":150,"unit":122,"favourable":151,"score":133,"optimal_max":81,"marginal_max":81},"Tidal Phase","flood",false,[153,160,163],{"id":154,"image_url":17,"sort_order":5,"is_primary":110,"moderation_status":155,"license":156,"license_url":157,"attribution":158,"author_name":159},"0ba1c03f-9b1c-415c-8224-b41c6a457633","approved","CC BY-SA 2.0","https:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F2.0\u002F","Photo by Jim Bendon from Karratha, Australia","Jim Bendon",{"id":161,"image_url":162,"sort_order":133,"is_primary":151,"moderation_status":155,"license":156,"license_url":157,"attribution":158,"author_name":159},"e56378fe-c9ae-4fdc-a3cc-56c3c3e56ce5","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_johns-beach-karratha-back-beach_1_ad5abb9d855d.jpg",{"id":164,"image_url":165,"sort_order":121,"is_primary":151,"moderation_status":155,"license":156,"license_url":157,"attribution":158,"author_name":159},"2db6ac6e-95b6-4118-9822-2e512b6e7779","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_johns-beach-karratha-back-beach_2_35d964c0b015.jpg",{"display_name":167},"Daniel","Western Australia","unverified",{"title":171,"description":172,"canonical_url":173,"og_image":17,"structured_data":174,"breadcrumbs":197},"Snorkeling Conditions at Johns Beach (Karratha Back Beach) - How's the Spot","Check snorkeling conditions at Johns Beach (Karratha Back Beach), Western Australia. Excellent conditions, water 26.7°C, waves 0.10m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fjohns-beach-karratha-back-beach",[175,184],{"@context":176,"@type":177,"name":11,"description":178,"url":173,"geo":179,"address":181},"https:\u002F\u002Fschema.org","Place","Johns Beach, better known locally as Karratha Back Beach, is a popular shore-entry snorkelling spot on the Pilbara coast. A public boat ramp and jetty provide easy access to the waters of the Dampi...",{"@type":180,"latitude":13,"longitude":14},"GeoCoordinates",{"@type":182,"addressRegion":168,"addressCountry":183},"PostalAddress","Australia",{"@context":176,"@type":185,"name":186,"description":172,"url":173,"breadcrumb":187},"WebPage","Snorkeling Conditions at Johns Beach (Karratha Back Beach)",{"@context":176,"@type":188,"itemListElement":189},"BreadcrumbList",[190,194,196],{"@type":191,"position":133,"name":192,"item":193},"ListItem","Home","https:\u002F\u002Fhowsthespot.com",{"@type":191,"position":121,"name":168,"item":195},"https:\u002F\u002Fhowsthespot.com\u002Fexplore?region=western-australia",{"@type":191,"position":85,"name":11,"item":173},[198,200,202],{"label":192,"href":199},"\u002F",{"label":168,"href":201},"\u002Fexplore?region=western-australia",{"label":11,"href":203},"\u002Fspots\u002Fjohns-beach-karratha-back-beach",1791009163250]