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126,842-acre Spencer Gulf. Sector 103 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 103 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 117 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The rest of this page walks each species through its year, using the map's own scoring.
Spencer Gulf - Sector 103 maps at 126,854 acres behind 59.2 miles of shoreline. A shoreline index of 1.2 says round and simple: fish relate to depth changes here, not shoreline features. Roughly 2% of the water is 15 ft or less, the band where the food chain lives. Call it 21.4 mi long by 17.6 mi wide at the broadest reach. If the bite dies, Spencer Gulf - Sector 102 is 10 mi to the west.
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.
Spring king george whiting on Spencer Gulf - Sector 103 hold shallow, usually 3 to 18 ft. By summer they slide out to 8 to 45 ft, and by winter most fish are in 11 to 45 ft. The chart's best answer is Sharp break — drop-off, 20 ft, good for summer. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 18 ft | dawn & dusk | open water | see map |
| Summer | 8 to 45 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Fall | 3 to 31 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Winter | 11 to 45 ft | midday | Sharp break (20 ft) | see map |
When the water first warms, sand flathead slide up into 8 to 35 ft. Summer is a 16 to 80 ft game here, winter an 8 to 35 ft one. Start at Sharp break. It's a drop-off holding about 20 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 | 8 to 35 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Summer | 16 to 80 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Fall | 8 to 56 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Winter | 8 to 35 ft | dawn | Sharp break (20 ft) | see map |
Spring puts black bream in skinny water — 2 to 16 ft is the zone. Warm water sends them out to 7 to 35 ft; cold water stacks them in 2 to 16 ft. Sharp break is the standout, a drop-off at roughly 20 ft, rated good for summer black bream. Plan around early morning and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 16 ft | dawn & dusk | open water | see map |
| Summer | 7 to 35 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Winter | 2 to 16 ft | dawn | open water | see map |
Start shallow in spring: australian salmon sit in 4 to 30 ft that time of year. Summer pushes them deeper, 14 to 80 ft, and winter fish settle into 4 to 30 ft. The spot to know is Sharp break, a drop-off in about 20 ft of water that rates prime for australian salmon 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 (29 ft) | see map |
| Summer | 14 to 80 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Winter | 4 to 30 ft | dawn | Shoreline point (29 ft) | see map |
Spring puts silver trevally in skinny water — 4 to 30 ft is the zone. Warm water sends them out to 14 to 80 ft; cold water stacks them in 18 to 80 ft. Sharp break is the standout, a drop-off at roughly 20 ft, rated prime for summer silver trevally. Plan around early morning and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 30 ft | dawn & dusk | Shoreline point (29 ft) | see map |
| Summer | 14 to 80 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Winter | 18 to 80 ft | midday | Sharp break (20 ft) | see map |
Spring puts gummy shark in skinny water — 8 to 40 ft is the zone. Warm water sends them out to 18 to 117 ft; cold water stacks them in 8 to 40 ft. Deepest basin is the standout, a deep basin at roughly 117 ft, rated prime for summer gummy shark. Plan around early morning and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Summer | 18 to 117 ft | dawn & dusk | Deepest basin (117 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (20 ft) | see map |
| Winter | 8 to 40 ft | dawn | Sharp break (20 ft) | see map |
Spencer Gulf - Sector 103 also holds yellowtail kingfish (18 to 117 ft in summer), mulloway (14 to 100 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Spencer Gulf - Sector 103 carries 9 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 117 ft down.
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 103 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 103 is about 117 ft (36 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 103. 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.
Sharp break is the top-rated area: a drop-off in about 20 ft of water that rates prime for australian salmon in summer. Every other rated spot, per species and season, is on the map above.
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 103 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.
Spencer Gulf - Sector 102 10 mi · Gulf St Vincent - Sector 21 16 mi · Spencer Gulf - Sector 97 21 mi · Spencer Gulf - Sector 105 30 mi · Gulf St Vincent - Sector 26 31 mi · Gulf St Vincent - Sector 22 31 mi · Gulf St Vincent - Sector 29 34 mi · Spencer Gulf - Sector 98 35 mi · Spencer Gulf - Sector 90 39 mi · Gulf St Vincent - Sector 30 41 mi · Gulf St Vincent - Sector 19 47 mi · Gulf St Vincent - Sector 14 50 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.