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44,272-acre Yanchep Lagoon Australian saltwater fishing map showing only directly measured AusBathyTopo 2026 cells, source-qualified fishing spots, official regional fish evidence, seasonal forage context, access guidance and current-rule links. Trip-scale surveyed footprint within Yanchep Lagoon. An official Australian lagoon evaluated inside a compact 24-kilometre trip-planning window centred on the Composite Gazetteer feature. The public outline is limited to retained direct AusBathyTopo survey cells, not a legal or navigational boundary. The displayed footprint is not a legal boundary or a claim of complete named-water coverage. The water tops out around 93 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The rest of this page walks each species through its year, using the map's own scoring.
The drawn water covers 44,270 acres wrapped in 43 miles of bank. A middling shoreline index (1.5) gives it some bays to work without being a maze. The shallow band under 15 ft claims about 8% of the surface — that's where the groceries are. Tip to tip the water measures near 18.5 mi with a 4.7-mi widest point. Its nearest charted neighbour, Cockburn Sound - Northwest, is 29 mi to the south.
Regional occurrence does not mean equal abundance, child-specific catch rate, retention permission or a promised catch. Live state, territory, Commonwealth, protected-area and local rules always control. The roster may combine exact-water monitoring with habitat-filtered official regional evidence; it does not imply that every species is equally abundant throughout the mapped section.
| Species | Evidence basis | Count / date |
|---|---|---|
| mulloway (Mulloway) | official species listing | — |
| yellowtail kingfish (Yellowtail Kingfish) | official species listing | — |
| tailor (Tailor) | official species listing | — |
| silver trevally (Silver Trevally) | official species listing | — |
| gummy shark (Gummy Shark) | official species listing | — |
| King George whiting (King George Whiting) | official species listing | — |
Official species-evidence source.
Spring mulloway on Yanchep Lagoon hold shallow, usually 5 to 30 ft. They move out to 13 to 93 ft in summer and finish the year down in 17 to 93 ft. Put Deepest basin first on the milk run — a deep basin near 90 ft that grades prime for summer. The feeding windows run early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 30 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Summer | 13 to 93 ft | dawn & dusk | Deepest basin (90 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Winter | 17 to 93 ft | midday | Deepest basin (90 ft) | see map |
Spring yellowtail kingfish on Yanchep Lagoon hold shallow, usually 8 to 45 ft. By summer they slide out to 14 to 93 ft, and by winter most fish are in 19 to 93 ft. The chart's best answer is Shoreline point — point, 24 ft, prime for spring. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 45 ft | dawn & dusk | Shoreline point (24 ft) | see map |
| Summer | 14 to 93 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Fall | 8 to 91 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Winter | 19 to 93 ft | midday | Sharp break (30 ft) | see map |
Spring puts tailor in skinny water — 3 to 25 ft is the zone. As the season builds they drop to 11 to 65 ft, wintering in 15 to 65 ft. Summer tailor concentrate at Sharp break, a prime-rated drop-off around 30 ft. Warm-month bites cluster around early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Shoreline point (24 ft) | see map |
| Summer | 11 to 65 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Fall | 3 to 46 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Winter | 15 to 65 ft | midday | Sharp break (30 ft) | see map |
In spring, silver trevally run shallow here, mostly 4 to 30 ft. Midsummer fish sit out in 14 to 80 ft before dropping to 18 to 80 ft for winter. Summer silver trevally concentrate at Sharp break, a prime-rated drop-off around 30 ft. Fish it in early morning and the evening and you'll meet the bite.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 30 ft | dawn & dusk | Shoreline point (24 ft) | see map |
| Summer | 14 to 80 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Winter | 18 to 80 ft | midday | Sharp break (30 ft) | see map |
In spring, gummy shark run shallow here, mostly 8 to 40 ft. Midsummer fish sit out in 14 to 93 ft before dropping to 8 to 40 ft for winter. Summer gummy shark concentrate at Deepest basin, a prime-rated deep basin around 90 ft. Fish it in early morning and the evening and you'll meet the bite.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Summer | 14 to 93 ft | dawn & dusk | Deepest basin (90 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Winter | 8 to 40 ft | dawn | Sharp break (30 ft) | see map |
Early season king george whiting use the shallows, holding in 3 to 18 ft. Expect a summer slide to 8 to 45 ft, then a winter hold in 11 to 45 ft. Put Sharp break first on the milk run — a drop-off near 30 ft that grades good for summer. In summer the feeding windows fall in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 18 ft | dawn & dusk | Shoreline point (18 ft) | see map |
| Summer | 8 to 45 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Fall | 3 to 31 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Winter | 11 to 45 ft | midday | Sharp break (30 ft) | see map |
16 pieces of structure are mapped here — Deepest basin, around 90 ft, is the deepest of them.
Access data: Western Australia Department of Transport Public Boat Ramps (DOT-033). Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Western Australia waters are set by the WA DPIRD (current recreational-fishing rules) — and special regulations can apply to Yanchep Lagoon specifically, so confirm the current rules before you fish. Check WA DPIRD's live regional guide, licences, demersal-management measures, species limits, seasonal and spatial closures, marine parks, protected species and permitted gear before every trip. Species available to target can change by bioregion and date; a regional occurrence record is not an open-season signal. A directly measured contour, fishing spot or access lead never grants fishing, retention, port entry, parking or launching permission.
Check the official Western Australia fishing regulations →
WA DPIRD current recreational-fishing guides →
Check special-area and water-specific rules →
Yanchep Lagoon is about 93 ft (28 m) deep at its deepest point. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Official coastal monitoring from Western Australia Department of Primary Industries and Regional Development regional evidence informs the mulloway, yellowtail kingfish, tailor, silver trevally, gummy shark, king george whiting roster for Yanchep Lagoon. The mixed roster combines exact-water records where available with habitat-filtered regional evidence; not every species is documented at this exact water, and it is not a promise of equal abundance or a catch on a particular trip.
Deepest basin is the top-rated area: a deep basin in about 90 ft of water that rates prime for mulloway in summer. The map above holds the full rated-spot list for every species and season.
For mulloway, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Yanchep Lagoon is regulated by the WA DPIRD (current recreational-fishing rules). Check the official Western Australia regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Cockburn Sound - Northwest 29 mi · Cockburn Sound - Northeast 41 mi · Cockburn Sound - West 44 mi · Cockburn Sound - Central 55 mi · Jurien Bay - West 84 mi · Jurien Bay - Northeast 89 mi · Jurien Bay - Northwest 104 mi · Geographe Bay - Sector 04 118 mi · Geographe Bay - Sector 03 120 mi · Gum Tree Bay 129 mi · Geographe Bay - Sector 08 129 mi · Geographe Bay - Sector 07 135 mi
See how Yanchep Lagoon stacks up: best mulloway lakes in Western Australia · best yellowtail kingfish lakes in Western Australia · best king george whiting lakes in Western Australia · best tailor lakes in Western Australia
Browse all Western Australia fishing maps. See every water on DepthScout. Bathymetry: published agency survey data. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.