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72,820-acre Gum Tree Bay 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 Gum Tree Bay. An official Australian bay 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 109 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. What the data behind the map says about each species, season by season:
Gum Tree Bay maps at 72,817 acres behind 45.7 miles of shoreline. Nearly circular (index 1.2), so the story is the bottom, not the bank. Littoral water — the productive band under ~15 ft — makes up 14% of this chart. Tip to tip the water measures near 16 mi with an 8.6-mi widest point. Its nearest charted neighbour, Jurien Bay - Northwest, is 25 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.
When the water first warms, mulloway slide up into 5 to 30 ft. By summer they slide out to 14 to 100 ft, and by winter most fish are in 18 to 100 ft. If you only fish one area, make it Sharp break: a drop-off around 74 ft that scores good in summer. In summer the feeding windows fall in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 30 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Summer | 14 to 100 ft | dawn & dusk | Sharp break (74 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Sharp break (69 ft) | see map |
| Winter | 18 to 100 ft | midday | Sharp break (74 ft) | see map |
Come spring, look for yellowtail kingfish tight to the bank in 8 to 45 ft. They move out to 17 to 109 ft in summer and finish the year down in 23 to 109 ft. If you only fish one area, make it Shoreline point: a point around 18 ft that scores prime in spring. Best bite is 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 | 17 to 109 ft | dawn & dusk | Sharp break (74 ft) | see map |
| Fall | 8 to 91 ft | dawn & dusk | Sharp break (74 ft) | see map |
| Winter | 23 to 109 ft | midday | Sharp break (74 ft) | see map |
Start shallow in spring: tailor sit in 3 to 25 ft that time of year. Warm water sends them out to 11 to 65 ft; cold water stacks them in 15 to 65 ft. Top water on the chart: Sharp break, a drop-off in the 11 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 | 3 to 25 ft | dawn & dusk | Shoreline point (18 ft) | see map |
| Summer | 11 to 65 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Fall | 3 to 46 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Winter | 15 to 65 ft | midday | Sharp break (36 ft) | see map |
Start shallow in spring: silver trevally sit in 4 to 30 ft that time of year. Summer pushes them deeper, 14 to 80 ft, and winter fish settle into 18 to 80 ft. The spot to know is Sharp break, a drop-off in about 74 ft of water that rates prime for silver trevally in summer. Warm-month bites cluster around 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 (74 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Winter | 18 to 80 ft | midday | Sharp break (74 ft) | see map |
Start shallow in spring: gummy shark sit in 8 to 40 ft that time of year. Summer pushes them deeper, 16 to 109 ft, and winter fish settle into 8 to 40 ft. The spot to know is Sharp break, a drop-off in about 74 ft of water that rates prime for gummy shark in summer. Warm-month bites cluster around early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Summer | 16 to 109 ft | dawn & dusk | Sharp break (74 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (74 ft) | see map |
| Winter | 8 to 40 ft | dawn | Sharp break (11 ft) | see map |
When the water first warms, king george whiting slide up into 3 to 18 ft. Summer is an 8 to 45 ft game here, winter an 11 to 45 ft one. Start at Sharp break. It's a drop-off holding about 11 ft of water and rates good come summer. The feeding windows run early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 18 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Summer | 8 to 45 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Fall | 3 to 31 ft | dawn & dusk | Sharp break (11 ft) | see map |
| Winter | 11 to 45 ft | midday | Sharp break (11 ft) | see map |
Structure-wise the chart holds 15 features, led in depth by Sharp break at roughly 76 ft.
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 Gum Tree Bay 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 →
Gum Tree Bay is about 109 ft (33 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 Gum Tree Bay. 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.
Shoreline point is the top-rated area: a point in about 18 ft of water that rates prime for yellowtail kingfish in spring. 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 Gum Tree Bay 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.
Jurien Bay - Northwest 25 mi · Jurien Bay - Northeast 40 mi · Jurien Bay - West 45 mi · Champion Bay - Northeast 69 mi · Champion Bay - Northwest 79 mi · Pelsaert Lagoon 85 mi · Horseyard Bay 117 mi · Yanchep Lagoon 129 mi · Cockburn Sound - Northwest 157 mi · Cockburn Sound - Northeast 169 mi · Cockburn Sound - West 172 mi · Cockburn Sound - Central 182 mi
See how Gum Tree Bay 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.