[{"data":1,"prerenderedAt":281},["ShallowReactive",2],{"leaderboard-total":3,"spot-seo-ammo-jetty-dive-site":9,"spot-ammo-jetty-dive-site":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 Ammo Jetty Dive Site - How's the Spot","Check snorkeling conditions at Ammo Jetty Dive Site, Western Australia. Fair conditions, water 19.1°C, waves 0.99m","https:\u002F\u002Fhowsthespot.com\u002Fspots\u002Fammo-jetty-dive-site","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_ammo-jetty-dive-site_0_dd096a92a589.jpg",[15,28],{"@context":16,"@type":17,"name":18,"description":19,"url":12,"geo":20,"address":24},"https:\u002F\u002Fschema.org","Place","Ammo Jetty Dive Site","Woodman Point Ammo Jetty, known to locals as the Ammo Jetty, is an iconic Perth snorkel and dive destination 9 km south of Fremantle. Originally built in 1903 for loading explosives, the jetty's he...",{"@type":21,"latitude":22,"longitude":23},"GeoCoordinates",-32.123956,115.757973,{"@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 Ammo Jetty Dive Site",{"@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\u002Fammo-jetty-dive-site",{"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":198,"area_boundary":125,"routes":125,"created_at":207,"updated_at":208,"today_conditions":209,"today_verdict_view":230,"images":255,"submitted_by":278,"region_name":26,"verification_status":280,"verified_at":125,"disputed":221,"verifier_count":5,"last_verified_display_name":125},"0e9db579-38ec-4a1c-a983-3b50da82d9ff","ammo-jetty-dive-site","Woodman Point Ammo Jetty, known to locals as the Ammo Jetty, is an iconic Perth snorkel and dive destination 9 km south of Fremantle. Originally built in 1903 for loading explosives, the jetty's heritage-listed concrete piles are encrusted with colourful sponges, soft corals, and invertebrate communities that attract huge schools of fish. The water depth ranges from 7–9 metres, so snorkellers cannot touch the bottom — the marine life is the show. The jetty is currently closed (as of 2026) due to storm damage and a major $17M replacement project is underway, with construction through 2027. Snorkellers should check current access status before visiting, with Sue's Groyne, Woodman Point Groyne, and the Omeo Wreck as nearby alternatives.","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],0.004069325823909827,0.009580000548645941,0.16611524296546198,0.014440773295855464,0.054810839874245496,0.004814749443883301,0.004811842523596494,0.004765109170341946,0.013737111875289554,0.12162132956348988,0.05054214454923644,0.02301955323559473,0.015695631430451714,0.04187806720123667,0.002783104438818689,[91,92,93,94,95,96,97,98,99,100,101,102,103,104,105],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",[109,114,119,122,126,129,132,135,138,141,144,147,152,155,158,161,164,167,170,173,177,180,183,186,189,192,195],{"name":110,"description":111,"severity":112,"season_start":36,"season_end":113},"Fishing lines and hooks","Ammo Jetty is a popular fishing spot. Snorkellers should stay directly under the jetty and avoid swimming along the edges where anglers cast lines, to avoid entanglement or injury from hooks.","warning",12,{"name":115,"description":116,"severity":117,"season_start":118,"season_end":113},"Boat traffic near jetty end","Boat traffic can be present around the outer end of the jetty where depths reach 8–9 metres. Snorkellers should surface cautiously and be visible.","caution",10,{"name":120,"description":121,"severity":117,"season_start":113,"season_end":113},"Crowds during peak times","The jetty gets very busy during summer weekends and school holidays, which can lead to congested water conditions and increased risk of accidental contact.",{"name":123,"description":124,"severity":117,"season_start":125,"season_end":125},"Boat traffic near jetty","The Ammo Jetty is used by recreational and fishing boats; snorkelers should stay alert and be visible.",null,{"name":127,"description":128,"severity":117,"season_start":125,"season_end":125},"Jagged structure \u002F debris","The ageing jetty has deteriorated surfaces and submerged debris that can cause cuts or scrapes.",{"name":130,"description":131,"severity":117,"season_start":125,"season_end":125},"Boat traffic","Boat activity in Cockburn Sound requires snorkelers to tow a dive flag for visibility.",{"name":133,"description":134,"severity":117,"season_start":125,"season_end":125},"Limited visibility near shore","Visibility can be low close to the beach (especially after wind\u002F swell), improving as you approach the rock wall.",{"name":136,"description":137,"severity":117,"season_start":125,"season_end":125},"Fishing line and hooks entanglement","Fishing activity from the jetty with hooks, lines, and sinkers. Snorkellers should watch for discarded fishing tackle.",{"name":139,"description":140,"severity":117,"season_start":125,"season_end":125},"Silt suspension (poor viz)","Silty bottom easily stirred up, reducing visibility from 8–10 m to near-zero within minutes.",{"name":142,"description":143,"severity":117,"season_start":125,"season_end":125},"Jetty redevelopment construction (2026+)","Construction works from 2026 onward may restrict access; check Department of Transport WA updates.",{"name":145,"description":146,"severity":117,"season_start":125,"season_end":125},"Fishing activity peak hours","Fishers are active from late morning onward; early morning (before 8am) is quietest.",{"name":148,"description":149,"severity":112,"season_start":150,"season_end":151},"Swell and wind chop","Winter swell and strong sea-breezes can deteriorate conditions quickly; check forecast before going.",5,8,{"name":153,"description":154,"severity":112,"season_start":125,"season_end":125},"Jetty closure (construction)","The jetty and waters immediately adjacent and underneath are closed due to storm damage and construction works until approximately late 2027.",{"name":156,"description":157,"severity":117,"season_start":36,"season_end":113},"Fishing lines","Jetty is heavily used by fishers; risk of entanglement from fishing lines and hooks in the water.",{"name":159,"description":160,"severity":112,"season_start":125,"season_end":125},"Structural deterioration","The old jetty piles are deteriorating with sharp, exposed metal and broken concrete underwater.",{"name":162,"description":163,"severity":117,"season_start":125,"season_end":125},"Boat traffic adjacent to zone","While motorised vessels are restricted near the jetty, boat traffic exists in the broader Woodman Point area.",{"name":165,"description":166,"severity":117,"season_start":125,"season_end":125},"Jetty structure debris","The old wooden jetty is deteriorating with loose timber, nails, and metal fittings; sharp objects may be present on the seabed.",{"name":168,"description":169,"severity":117,"season_start":125,"season_end":125},"Boat traffic (outside exclusion zone)","Motorised vessels are restricted around the jetty, but kayaks and dinghies may be present; keep awareness near the T-head and channel.",{"name":171,"description":172,"severity":112,"season_start":125,"season_end":125},"Storm damage \u002F construction closure","As of 2026, the jetty is closed due to storm damage and construction. Access under and immediately adjacent to the jetty is prohibited.",{"name":174,"description":175,"severity":176,"season_start":36,"season_end":113},"Jetty closed for construction","The jetty is closed to the public including waters immediately adjacent to and underneath due to storm damage and construction works (spring 2026 onward).","danger",{"name":178,"description":179,"severity":112,"season_start":125,"season_end":125},"Fishing line entanglement on piles","The old jetty piles are covered in marine growth but also tangled fishing line — a dive knife is strongly advised when snorkelling under the jetty.",{"name":181,"description":182,"severity":117,"season_start":125,"season_end":125},"Boat traffic in adjacent waters","Motorised vessels are restricted immediately around the jetty but occur in the surrounding Owen Anchorage and Cockburn Sound.",{"name":184,"description":185,"severity":112,"season_start":125,"season_end":125},"Deteriorating jetty structure","The old ammunition jetty has deteriorated over time with exposed metal and debris; caution needed around the pylons.",{"name":187,"description":188,"severity":117,"season_start":125,"season_end":125},"Sharp marine growth","Barnacles and encrusting organisms on the jetty pylons can cause cuts — wearing a wetsuit or rash guard is recommended.",{"name":190,"description":191,"severity":176,"season_start":125,"season_end":125},"Jetty closed (storm damage)","Due to storm damage sustained in mid-2026, the jetty is closed to the public including waters immediately adjacent to and under the structure. Swimming, diving and snorkelling are prohibited until further notice.",{"name":193,"description":194,"severity":112,"season_start":125,"season_end":125},"Depth (7-9 metres)","The water depth at the jetty is 7-9 metres — you cannot touch the bottom. Suitable only for confident swimmers and snorkellers.",{"name":196,"description":197,"severity":176,"season_start":125,"season_end":125},"Construction activity","Major reconstruction works began in spring 2026 with heavy machinery, vessels, and debris hazard in the vicinity for approximately 12 months.",{"directions":199,"parking":200,"facilities":201,"fees":205,"access_method":206},"Located within Woodman Point Regional Park, John Graham Reserve, Coogee. From Perth CBD, drive ~30 km south or ~15 min from Fremantle. Enter Woodman Point via Cockburn Road; follow signs to the jetty. The jetty is a 5-10 minute walk from the carpark along a flat, paved path.","Car park available at John Graham Reserve \u002F Woodman Point Regional Park; walking path leads to the jetty.",[202,203,204],"parking","toilets","picnic_tables","No entry fee for the park or jetty access.","shore_entry","2026-07-27T02:55:03.345497Z","2026-08-04T05:30:44.786446Z",{"verdict":210,"evaluated_at":211,"models":212},"marginal","2026-10-03T02:15:39.128490Z",[213,219,225],{"model_name":214,"is_favourable":215,"value":216,"threshold":118,"unit":217,"operator":218},"Wind Speed",true,1.98,"kn","lte",{"model_name":220,"is_favourable":221,"value":222,"threshold":223,"unit":224,"operator":218},"Wave Height",false,0.991,0.5,"m",{"model_name":226,"is_favourable":215,"value":227,"threshold":40,"unit":228,"operator":229},"Visibility",2.1,"","gte",{"verdict":210,"rating":231,"evaluated_at":211,"generated_at":211,"source":232,"confidence":233,"visibility":236,"parameters":237,"models_passed":40,"models_total":150},"Fair","precomputed",{"level":234,"value":235},"High",100,{"score":227,"rating":125,"confidence":125},[238,240,244,247,252],{"name":220,"value":239,"label":125,"unit":224,"favourable":221,"score":36,"optimal_max":223,"marginal_max":36},0.991480966802787,{"name":241,"value":242,"label":125,"unit":243,"favourable":221,"score":36,"optimal_max":151,"marginal_max":113},"Swell Period",10.85,"s",{"name":214,"value":245,"label":125,"unit":217,"favourable":215,"score":43,"optimal_max":118,"marginal_max":246},1.9836188230441885,15,{"name":248,"value":249,"label":125,"unit":250,"favourable":215,"score":43,"optimal_max":150,"marginal_max":251},"Precipitation",0.6,"mm",20,{"name":253,"value":125,"label":254,"unit":228,"favourable":221,"score":36,"optimal_max":125,"marginal_max":125},"Tidal Phase","ebb",[256,259,266,271,274],{"id":257,"image_url":13,"sort_order":5,"is_primary":215,"moderation_status":258,"license":125,"license_url":125,"attribution":125,"author_name":125},"ed12b66a-9ed1-43e2-806f-599b3b3cac50","approved",{"id":260,"image_url":261,"sort_order":36,"is_primary":221,"moderation_status":258,"license":262,"license_url":263,"attribution":264,"author_name":265},"a9d96066-1b0c-4654-927c-467ca3f665fb","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_ammo-jetty-dive-site_1_ed4dcb9bb6e7.jpg","CC BY-SA 4.0","https:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F","Photo by ZidaneHartono","ZidaneHartono",{"id":267,"image_url":268,"sort_order":40,"is_primary":221,"moderation_status":258,"license":262,"license_url":263,"attribution":269,"author_name":270},"870aa6ca-3ac8-4f0c-925a-d1f09992ac9c","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_ammo-jetty-dive-site_2_f749074cc3aa.jpg","Photo by Calistemon","Calistemon",{"id":272,"image_url":273,"sort_order":43,"is_primary":221,"moderation_status":258,"license":262,"license_url":263,"attribution":269,"author_name":270},"4a58dccc-2a87-444c-9500-0538c50bfb27","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_ammo-jetty-dive-site_3_ca5ba9e167ca.jpg",{"id":275,"image_url":276,"sort_order":277,"is_primary":221,"moderation_status":258,"license":262,"license_url":263,"attribution":269,"author_name":270},"cbb48e40-6cd2-4f03-874a-b243d2b6a5b2","https:\u002F\u002Fhowsthespot.syd1.cdn.digitaloceanspaces.com\u002Fspots\u002Fimport_ammo-jetty-dive-site_4_c7b9856935d7.jpg",4,{"display_name":279},"Daniel","unverified",1791009125469]