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26,244-acre Geographe Bay. Sector 03 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 03 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 104 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Below is the species-by-species picture, pulled from the same data the map uses.
Traced from the shoreline, Geographe Bay - Sector 03 runs 26,241 acres with 31.5 miles of edge. The basin is a simple one (shoreline index 1.4) — close to a bowl, so the structure on the chart matters more than the bank. Roughly 2% of the water is 15 ft or less, the band where the food chain lives. Call it 12.6 mi long by 5.8 mi wide at the broadest reach. The nearest mapped water is Geographe Bay - Sector 04, 7 mi to the east.
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 | — |
| gummy shark (Gummy Shark) | official species listing | — |
Official species-evidence source.
Start shallow in spring: mulloway sit in 5 to 30 ft that time of year. Warm water sends them out to 14 to 100 ft; cold water stacks them in 18 to 100 ft. Top water on the chart: Deepest basin, a deep basin in the 104 ft range, prime in summer. Fish it in early morning and the evening and you'll meet the bite.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 30 ft | dawn & dusk | open water | see map |
| Summer | 14 to 100 ft | dawn & dusk | Deepest basin (104 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Sharp break (78 ft) | see map |
| Winter | 18 to 100 ft | midday | Deepest basin (104 ft) | see map |
When the water first warms, gummy shark slide up into 8 to 40 ft. Summer is a 16 to 104 ft game here, winter an 8 to 40 ft one. Start at Deepest basin. It's a deep basin holding about 104 ft of water and rates prime come summer. The feeding windows run early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | open water | see map |
| Summer | 16 to 104 ft | dawn & dusk | Deepest basin (104 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (78 ft) | see map |
| Winter | 8 to 40 ft | dawn | open water | see map |
Geographe Bay - Sector 03 carries 6 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 104 ft down.
No facility from the cited Western Australia Department of Transport Public Boat Ramps (DOT-033) source was spatially attached within 3 km of this directly measured map footprint during the 2026-09-08 audit. This is an evidence gap, not a claim that public access is absent. Check the official portal, live site signs, tides, ramp condition, vessel suitability, fees, parking, working-port restrictions and landowner permissions before travel: https://catalogue.data.wa.gov.au/dataset/boat-ramps
Private land and private launches need the owner's permission — please ask first.
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 03 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 03 is about 104 ft (32 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, gummy shark roster for Geographe Bay - Sector 03. 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 104 ft of water that rates prime for gummy shark in summer. Every other rated spot, per species and season, is on the map above.
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 03 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 04 7 mi · Geographe Bay - Sector 08 11 mi · Geographe Bay - Sector 07 15 mi · Geographe Bay - Sector 11 25 mi · Geographe Bay - Sector 06 28 mi · Geographe Bay - Sector 10 28 mi · Geographe Bay - Sector 05 33 mi · Geographe Bay - Sector 09 42 mi · Geographe Bay - Sector 13 57 mi · Cockburn Sound - Central 66 mi · Hamelin Bay - Northwest 66 mi · Hamelin Bay - Northeast 75 mi
See how Geographe Bay - Sector 03 stacks up: best mulloway lakes in Western Australia · best gummy shark 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.