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10,135-acre Spencer Gulf. Sector 42 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 42 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 25 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:
The outline encloses 10,135 acres, worked by 38.1 miles of shoreline. That shoreline is heavily fingered (development index 2.7) — bays, points and pockets everywhere, which multiplies the fishable edge. About 96% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. The basin spans about 8.7 mi end to end and 3.5 mi across at its widest. Spencer Gulf - Sector 41 sits 4 mi west — the closest neighbouring chart.
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 42 hold shallow, usually 3 to 18 ft. They move out to 4 to 25 ft in summer and finish the year down in 6 to 25 ft. Put Shallow measured flat first on the milk run — a feeding flat near 5 ft that grades prime for spring. 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 | Shallow measured flat (5 ft) | see map |
| Summer | 4 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 6 to 25 ft | midday | Sharp break (10 ft) | see map |
When the water first warms, sand flathead slide up into 6 to 25 ft. There's no big seasonal slide here — summer means 5 to 25 ft, winter 6 to 25 ft. If you only fish one area, make it Shallow measured flat: a feeding flat around 5 ft that scores prime in spring. In summer the feeding windows fall in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 6 to 25 ft | dawn & dusk | Shallow measured flat (5 ft) | see map |
| Summer | 5 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Fall | 4 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 6 to 25 ft | dawn | Shallow measured flat (5 ft) | see map |
Spring puts black bream in skinny water — 2 to 16 ft is the zone. As the season builds they drop to 5 to 25 ft, wintering in 2 to 16 ft. Summer black bream concentrate at Sharp break, a good-rated drop-off around 10 ft. 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 | Sharp break (10 ft) | see map |
| Summer | 5 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 2 to 16 ft | dawn | Sharp break (10 ft) | see map |
Start shallow in spring: australian salmon sit in 3 to 25 ft that time of year. They don't go far with the seasons — 4 to 25 ft covers summer, 3 to 25 ft covers winter. Top water on the chart: Sharp break, a drop-off in the 10 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 (4 ft) | see map |
| Summer | 4 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 3 to 25 ft | dawn | Shoreline point (4 ft) | see map |
Spring puts silver trevally in skinny water — 3 to 25 ft is the zone. Summer fish stay in 4 to 25 ft, and winter fish hold in 6 to 25 ft. Summer silver trevally concentrate at Sharp break, a prime-rated drop-off around 10 ft. Warm-month bites cluster around early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Shoreline point (4 ft) | see map |
| Summer | 4 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 6 to 25 ft | midday | Sharp break (10 ft) | see map |
Spring puts gummy shark in skinny water — 5 to 25 ft is the zone. Summer fish stay in 4 to 25 ft, and winter fish hold in 5 to 25 ft. Summer gummy shark concentrate at Sharp break, a prime-rated drop-off around 10 ft. Warm-month bites cluster around early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | Shallow measured flat (5 ft) | see map |
| Summer | 4 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Fall | 2 to 25 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 5 to 25 ft | dawn | Shallow measured flat (5 ft) | see map |
Spencer Gulf - Sector 42 also holds yellowtail kingfish (4 to 25 ft in summer), mulloway (4 to 25 ft in summer). Pick any of them on the map above for rated spots and bait picks.
8 pieces of structure are mapped here — Sharp break, around 10 ft, is the deepest of them.
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 42 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 42 is about 25 ft (8 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 42. 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 5 ft of water that rates prime for king george whiting in spring. Scroll up to the map for the complete spot list by 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 42 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 41 4 mi · Spencer Gulf - Sector 34 16 mi · Spencer Gulf - Sector 33 23 mi · Spencer Gulf - Sector 40 26 mi · Spencer Gulf - Sector 27 31 mi · Spencer Gulf - Sector 53 61 mi · Spencer Gulf - Sector 61 62 mi · Spencer Gulf - Sector 60 67 mi · Spencer Gulf - Sector 52 67 mi · Spencer Gulf - Sector 59 76 mi · Spencer Gulf - Sector 66 88 mi · Spencer Gulf - Sector 73 99 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.