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10,387-acre Cambridge Gulf. Sector 40 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 40 trip-scale surveyed footprint within Cambridge Gulf. A remote, highly tidal Kimberley gulf of estuary channels, mud banks, rocky narrows and Joseph Bonaparte Gulf approaches. The displayed footprint is not a legal boundary or a claim of complete named-water coverage. The water tops out around 40 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Here's the year, species by species, as the scoring engine sees it.
The drawn water covers 10,386 acres wrapped in 24.2 miles of bank. A middling shoreline index (1.7) gives it some bays to work without being a maze. 68% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. The basin spans about 10.7 mi end to end and 2.3 mi across at its widest. Its nearest charted neighbour, Cambridge Gulf - Sector 39, is 3 mi to the southwest.
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 |
|---|---|---|
| barramundi (Barramundi) | official species listing | — |
| golden snapper (Golden Snapper) | official species listing | — |
| black jewfish (Black Jewfish) | official species listing | — |
| king threadfin (King Threadfin) | official species listing | — |
| queenfish (Queenfish) | official species listing | — |
| giant trevally (Giant Trevally) | official species listing | — |
| mangrove jack (Mangrove Jack) | official species listing | — |
| Spanish mackerel (Narrow-barred Spanish Mackerel) | official species listing | — |
| coral trout (Coral Trout) | official species listing | — |
Official species-evidence source.
Start shallow in spring: barramundi sit in 2 to 18 ft that time of year. They don't go far with the seasons — 2 to 18 ft covers summer, 11 to 35 ft covers winter. The spot to know is Sharp break, a drop-off in about 21 ft of water that rates good for barramundi in fall. Warm-month bites cluster around early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 18 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Summer | 2 to 18 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (21 ft) | see map |
| Winter | 11 to 35 ft | midday | Sharp break (31 ft) | see map |
The spring pattern is a shallow one: golden snapper in 8 to 35 ft. The depth story barely changes: 8 to 35 ft through summer, 11 to 40 ft in winter. Top water on the chart: Sharp break, a drop-off in the 36 ft range, good in fall. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Summer | 8 to 35 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Fall | 6 to 40 ft | dawn & dusk | Sharp break (36 ft) | see map |
| Winter | 11 to 40 ft | midday | Sharp break (36 ft) | see map |
Come spring, look for black jewfish tight to the bank in 8 to 35 ft. Through summer count on 8 to 35 ft; the winter hold is 9 to 40 ft. Start at Deepest basin. It's a deep basin holding about 36 ft of water and rates prime come fall. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Summer | 8 to 35 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Fall | 5 to 40 ft | dawn & dusk | Deepest basin (36 ft) | see map |
| Winter | 9 to 40 ft | midday | Deepest basin (36 ft) | see map |
Start shallow in spring: king threadfin sit in 2 to 16 ft that time of year. They don't go far with the seasons — 2 to 16 ft covers summer, 10 to 35 ft covers winter. The spot to know is Sharp break, a drop-off in about 21 ft of water that rates good for king threadfin in fall. Warm-month bites cluster around early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 16 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Summer | 2 to 16 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (21 ft) | see map |
| Winter | 10 to 35 ft | midday | Sharp break (31 ft) | see map |
Spring queenfish on Cambridge Gulf - Sector 40 hold shallow, usually 3 to 25 ft. Depth-wise the year is flat: 3 to 25 ft in summer, 11 to 40 ft once it turns cold. Put Sharp break first on the milk run — a drop-off near 36 ft that grades prime for fall. The feeding windows run early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Summer | 3 to 25 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Fall | 3 to 39 ft | dawn & dusk | Sharp break (36 ft) | see map |
| Winter | 11 to 40 ft | midday | Sharp break (36 ft) | see map |
Start shallow in spring: giant trevally sit in 4 to 30 ft that time of year. They don't go far with the seasons — 4 to 30 ft covers summer, 9 to 40 ft covers winter. The spot to know is Shoreline point, a point in about 8 ft of water that rates prime for giant trevally in spring. 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 (8 ft) | see map |
| Summer | 4 to 30 ft | dawn & dusk | Shoreline point (8 ft) | see map |
| Fall | 3 to 40 ft | dawn & dusk | Sharp break (36 ft) | see map |
| Winter | 9 to 40 ft | midday | Sharp break (36 ft) | see map |
Cambridge Gulf - Sector 40 also holds mangrove jack (2 to 18 ft in summer), narrow-barred spanish mackerel (7 to 40 ft in summer), coral trout (8 to 35 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Cambridge Gulf - Sector 40 carries 7 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 36 ft down.
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 Cambridge Gulf - Sector 40 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 →
Cambridge Gulf - Sector 40 is about 40 ft (12 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 barramundi, golden snapper, black jewfish, king threadfin, queenfish, giant trevally, mangrove jack, narrow-barred spanish mackerel, coral trout roster for Cambridge Gulf - Sector 40. 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 36 ft of water that rates prime for black jewfish in fall. The interactive chart above rates every spot for each species and season.
For barramundi, 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 Cambridge Gulf - Sector 40 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.
Cambridge Gulf - Sector 39 3 mi · Cambridge Gulf - Sector 34 12 mi · Cambridge Gulf - Sector 23 49 mi · Cambridge Gulf - Sector 24 55 mi · Vansittart Bay 153 mi · Anson Bay - Sector 09 180 mi, NT_AU · Anson Bay - Sector 05 189 mi, NT_AU · Anson Bay - Sector 10 191 mi, NT_AU · Prince Frederick Harbour 192 mi · Anson Bay - Sector 06 196 mi, NT_AU · Anson Bay - Sector 02 208 mi, NT_AU · Fog Bay - West 220 mi, NT_AU
See how Cambridge Gulf - Sector 40 stacks up: best barramundi lakes in Western Australia · best golden snapper lakes in Western Australia · best black jewfish lakes in Western Australia · best king threadfin 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.