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4,902-acre Spencer Gulf. Sector 90 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 90 trip-scale surveyed footprint within Spencer Gulf. Australia's long western gulf, divided from upper tidal flats through major bays and channels to its offshore-facing mouth. The displayed footprint is not a legal boundary or a claim of complete named-water coverage. The water tops out around 38 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:
Traced from the shoreline, Spencer Gulf - Sector 90 runs 4,902 acres with 13.7 miles of edge. At index 1.4 the outline is almost a bowl — read the depth changes, not the shoreline. The shallow band under 15 ft claims about 69% of the surface — that's where the groceries are. Tip to tip the water measures near 4 mi with a 3.2-mi widest point. For a second option, Gulf St Vincent - Sector 14 lies 17 mi 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 |
|---|---|---|
| King George whiting (King George Whiting) | official species listing | — |
| sand flathead (Sand Flathead) | official species listing | — |
| black bream (Black Bream) | official species listing | — |
| Australian salmon (Australian Salmon) | official species listing | — |
| silver trevally (Silver Trevally) | official species listing | — |
| gummy shark (Gummy Shark) | official species listing | — |
| yellowtail kingfish (Yellowtail Kingfish) | official species listing | — |
| mulloway (Mulloway) | official species listing | — |
Official species-evidence source.
In spring, king george whiting run shallow here, mostly 3 to 18 ft. Summer pushes them deeper, 7 to 38 ft, and winter fish settle into 9 to 38 ft. Shallow measured flat is the standout, a feeding flat at roughly 8 ft, rated prime for spring king george whiting. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 18 ft | dawn & dusk | Shallow measured flat (8 ft) | see map |
| Summer | 7 to 38 ft | dawn & dusk | Shallow measured flat (8 ft) | see map |
| Fall | 3 to 31 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Winter | 9 to 38 ft | midday | Shallow measured flat (8 ft) | see map |
The spring pattern is a shallow one: sand flathead in 8 to 35 ft. Midsummer fish sit out in 8 to 38 ft before dropping to 8 to 35 ft for winter. The spot to know is Shallow measured flat, a feeding flat in about 8 ft of water that rates prime for sand flathead in spring. Plan around early morning and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dawn & dusk | Shallow measured flat (8 ft) | see map |
| Summer | 8 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Fall | 5 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Winter | 8 to 35 ft | dawn | Shallow measured flat (8 ft) | see map |
Come spring, look for black bream tight to the bank in 2 to 16 ft. Expect a summer slide to 7 to 35 ft, then a winter hold in 2 to 16 ft. Start at Sharp break. It's a drop-off holding about 6 ft of water and rates good come fall. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 16 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Summer | 7 to 35 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Winter | 2 to 16 ft | dawn | Sharp break (6 ft) | see map |
Spring australian salmon on Spencer Gulf - Sector 90 hold shallow, usually 4 to 30 ft. They move out to 7 to 38 ft in summer and finish the year down in 4 to 30 ft. Put Sharp break first on the milk run — a drop-off near 6 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 | 4 to 30 ft | dawn & dusk | Shoreline point (20 ft) | see map |
| Summer | 7 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Fall | 3 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Winter | 4 to 30 ft | dawn | Shoreline point (20 ft) | see map |
Come spring, look for silver trevally tight to the bank in 4 to 30 ft. Expect a summer slide to 7 to 38 ft, then a winter hold in 9 to 38 ft. Start at Sharp break. It's a drop-off holding about 6 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 | 4 to 30 ft | dawn & dusk | Shoreline point (20 ft) | see map |
| Summer | 7 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Fall | 3 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Winter | 9 to 38 ft | midday | Sharp break (6 ft) | see map |
Come spring, look for gummy shark tight to the bank in 8 to 38 ft. Through summer count on 6 to 38 ft; the winter hold is 8 to 38 ft. Start at Sharp break. It's a drop-off holding about 6 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 | 8 to 38 ft | dawn & dusk | Shallow measured flat (8 ft) | see map |
| Summer | 6 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Fall | 4 to 38 ft | dawn & dusk | Sharp break (6 ft) | see map |
| Winter | 8 to 38 ft | dawn | Shallow measured flat (8 ft) | see map |
Spencer Gulf - Sector 90 also holds yellowtail kingfish (6 to 38 ft in summer), mulloway (5 to 38 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Structure-wise the chart holds 6 features, led in depth by Shoreline point at roughly 20 ft.
No facility from the cited South Australian boat ramps and marine facilities 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://www.sa.gov.au/topics/boating-and-marine/boat-ramps-and-marine-facilities
Private land and private launches need the owner's permission — please ask first.
Season dates, license requirements, and size and bag limits for South Australia waters are set by the PIRSA (current recreational species limits) — and special regulations can apply to Spencer Gulf - Sector 90 specifically, so confirm the current rules before you fish. Check PIRSA's live species lookup, closures and SA Fishing app before every trip. Snapper remains absent from these page rosters because the current management closure prohibits targeting and catch-and-release in the affected South Australian waters through the stated closure period. Verify all size, boat and possession limits, protected areas, gear controls and local access directions. A contour, spot or access lead never grants fishing, retention, entry, parking or launching permission.
Check the official South Australia fishing regulations →
PIRSA SA Fishing app and live rules →
Check special-area and water-specific rules →
Spencer Gulf - Sector 90 is about 38 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 Primary Industries and Regions South Australia regional evidence informs the king george whiting, sand flathead, black bream, australian salmon, silver trevally, gummy shark, yellowtail kingfish, mulloway roster for Spencer Gulf - Sector 90. 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.
Shallow measured flat is the top-rated area: a feeding flat in about 8 ft of water that rates prime for king george whiting in spring. The map above holds the full rated-spot list for every species and season.
For king george whiting, 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 Spencer Gulf - Sector 90 is regulated by the PIRSA (current recreational species limits). Check the official South Australia regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Gulf St Vincent - Sector 14 17 mi · Spencer Gulf - Sector 84 20 mi · Spencer Gulf - Sector 97 23 mi · Spencer Gulf - Sector 98 23 mi · Gulf St Vincent - Sector 10 25 mi · Gulf St Vincent - Sector 15 28 mi · Gulf St Vincent - Sector 19 29 mi · Gulf St Vincent - Sector 21 30 mi · Gulf St Vincent - Sector 22 32 mi · Spencer Gulf - Sector 105 35 mi · Spencer Gulf - Sector 103 39 mi · Spencer Gulf - Sector 102 45 mi
Browse all South 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.