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The 3.5-tonne artificial reef sits just 50–75 metres offshore, creating a calm, beginner-friendly snorkel zone teeming with macroalgae, seaweed, and mussels that have rapidly colonised the structures. Underwater surveys have recorded double the marine life since installation, making this a must-visit for anyone wanting to see a thriving artificial ecosystem in Perth's crystal-clear coastal waters.","beginner",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],0.004069325823909827,0.009580000548645941,0.16611524296546198,0.014440773295855464,0.054810839874245496,0.004814749443883301,0.004811842523596494,0.004765109170341946,0.013737111875289554,0.12162132956348988,0.05054214454923644,0.02301955323559473,0.015695631430451714,0.04187806720123667,0.002783104438818689,[92,93,94,95,96,97,98,99,100,101,102,103,104,105,106],42.10913576643702,226.59353320467483,181.78257235747367,35.716919813675986,58.15611909694036,137.3296854619773,31.286949502097734,226.83045619214965,106.35504050734063,176.18030674893157,170.98156153344047,173.28370864095223,311.95285072805956,62.99541932275986,232.04190429418964,"EOT20","1992-01-01T00:00:00Z",[110,114],{"name":111,"description":112,"severity":113,"season_start":56,"season_end":56},"Boat traffic","The reef is close to shore but swimmers should be mindful of boat traffic in the area, particularly on weekends.","caution",{"name":115,"description":116,"severity":113,"season_start":117,"season_end":118},"Winter swell and cool water","During winter months, cold water and stronger swells can make snorkelling less comfortable and reduce visibility.",5,8,{"directions":120,"parking":121,"facilities":122,"fees":124,"access_method":125},"Located at the end of Rollinson Rd, North Coogee. The engineered reef sits about 50–75 metres offshore from the dog beach. Free parking available on Socrates Parade and adjacent streets.","Free street parking on Socrates Parade, Chieftain Esplanade, and nearby streets.",[123],"parking","Free","shore_entry","2026-07-27T02:55:07.861183Z","2026-08-04T05:36:16.070468Z",{"verdict":129,"evaluated_at":130,"models":131},"marginal","2026-10-03T02:20:35.510287Z",[132,139,145],{"model_name":133,"is_favourable":134,"value":135,"threshold":136,"unit":137,"operator":138},"Wind Speed",true,1.71,10,"kn","lte",{"model_name":140,"is_favourable":141,"value":142,"threshold":143,"unit":144,"operator":138},"Wave Height",false,0.888,0.5,"m",{"model_name":146,"is_favourable":134,"value":147,"threshold":40,"unit":148,"operator":149},"Visibility",2.1,"","gte",{"verdict":129,"rating":151,"evaluated_at":130,"generated_at":130,"source":152,"confidence":153,"visibility":156,"parameters":157,"models_passed":40,"models_total":117},"Fair","precomputed",{"level":154,"value":155},"High",100,{"score":147,"rating":56,"confidence":56},[158,160,165,168,173],{"name":140,"value":159,"label":56,"unit":144,"favourable":141,"score":36,"optimal_max":143,"marginal_max":36},0.887888369880318,{"name":161,"value":162,"label":56,"unit":163,"favourable":141,"score":36,"optimal_max":118,"marginal_max":164},"Swell Period",10.85,"s",12,{"name":133,"value":166,"label":56,"unit":137,"favourable":134,"score":43,"optimal_max":136,"marginal_max":167},1.713162607524044,15,{"name":169,"value":170,"label":56,"unit":171,"favourable":134,"score":43,"optimal_max":117,"marginal_max":172},"Precipitation",0.6,"mm",20,{"name":174,"value":56,"label":175,"unit":148,"favourable":141,"score":36,"optimal_max":56,"marginal_max":56},"Tidal Phase","ebb",[],{"display_name":178},"Daniel","unverified",1791009179890]