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63,652-acre Geographe Bay. Sector 04 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. Sector 04 trip-scale surveyed footprint within Geographe Bay. A broad southwest-facing bay with long sand flats, seagrass, artificial structure and headland transitions. The displayed footprint is not a legal boundary or a claim of complete named-water coverage. The water tops out around 83 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. What follows comes from the same scoring engine that paints the spots above.
Geographe Bay - Sector 04 maps at 63,651 acres behind 49.2 miles of shoreline. A shoreline index of 1.4 says round and simple: fish relate to depth changes here, not shoreline features. 7% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The basin spans about 16.8 mi end to end and 8.8 mi across at its widest. Geographe Bay - Sector 03 sits 7 mi west — the closest neighbouring chart.
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.
Come spring, look for mulloway tight to the bank in 5 to 30 ft. Expect a summer slide to 12 to 83 ft, then a winter hold in 15 to 83 ft. Start at Deepest basin. It's a deep basin holding about 83 ft of water and rates prime come summer. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 30 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Summer | 12 to 83 ft | dawn & dusk | Deepest basin (83 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Winter | 15 to 83 ft | midday | Deepest basin (83 ft) | see map |
When the water first warms, yellowtail kingfish slide up into 8 to 45 ft. Summer is a 13 to 83 ft game here, winter a 17 to 83 ft one. Start at Shoreline point. It's a point holding about 18 ft of water and rates prime come spring. The feeding windows run early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 45 ft | dawn & dusk | Shoreline point (18 ft) | see map |
| Summer | 13 to 83 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Fall | 7 to 83 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Winter | 17 to 83 ft | midday | Sharp break (32 ft) | see map |
The spring pattern is a shallow one: tailor in 3 to 25 ft. Midsummer fish sit out in 11 to 65 ft before dropping to 15 to 65 ft for winter. The spot to know is Sharp break, a drop-off in about 32 ft of water that rates prime for tailor in summer. Plan around early morning and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Shoreline point (18 ft) | see map |
| Summer | 11 to 65 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Fall | 3 to 46 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Winter | 15 to 65 ft | midday | Sharp break (32 ft) | see map |
The spring pattern is a shallow one: silver trevally in 4 to 30 ft. As the season builds they drop to 14 to 80 ft, wintering in 18 to 80 ft. Top water on the chart: Sharp break, a drop-off in the 32 ft range, prime in summer. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 30 ft | dawn & dusk | Shoreline point (18 ft) | see map |
| Summer | 14 to 80 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Winter | 18 to 80 ft | midday | Sharp break (32 ft) | see map |
The spring pattern is a shallow one: gummy shark in 8 to 40 ft. As the season builds they drop to 12 to 83 ft, wintering in 8 to 40 ft. Top water on the chart: Deepest basin, a deep basin in the 83 ft range, prime in summer. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | Shallow measured flat (7 ft) | see map |
| Summer | 12 to 83 ft | dawn & dusk | Deepest basin (83 ft) | see map |
| Fall | 8 to 83 ft | dawn & dusk | Deepest basin (83 ft) | see map |
| Winter | 8 to 40 ft | dawn | Shallow measured flat (7 ft) | see map |
Come spring, look for king george whiting tight to the bank in 3 to 18 ft. They move out to 8 to 45 ft in summer and finish the year down in 11 to 45 ft. If you only fish one area, make it Shallow measured flat: a feeding flat around 7 ft that scores prime in spring. Best bite is early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 18 ft | dawn & dusk | Shallow measured flat (7 ft) | see map |
| Summer | 8 to 45 ft | dawn & dusk | Sharp break (32 ft) | see map |
| Fall | 3 to 31 ft | dawn & dusk | Shallow measured flat (7 ft) | see map |
| Winter | 11 to 45 ft | midday | Sharp break (32 ft) | see map |
Count 11 structure marks on this chart. The deepest, Deepest basin, sits near 83 ft.
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 Geographe Bay - Sector 04 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 →
Geographe Bay - Sector 04 is about 83 ft (25 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 Geographe Bay - Sector 04. 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 83 ft of water that rates prime for mulloway in summer. Scroll up to the map for the complete spot list by 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 Geographe Bay - Sector 04 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.
Geographe Bay - Sector 03 7 mi · Geographe Bay - Sector 08 11 mi · Geographe Bay - Sector 07 19 mi · Geographe Bay - Sector 11 29 mi · Geographe Bay - Sector 10 34 mi · Geographe Bay - Sector 06 35 mi · Geographe Bay - Sector 05 40 mi · Geographe Bay - Sector 09 48 mi · Geographe Bay - Sector 13 63 mi · Cockburn Sound - Central 64 mi · Hamelin Bay - Northwest 71 mi · Cockburn Sound - West 76 mi
See how Geographe Bay - Sector 04 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.