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36,052-acre Spencer Gulf. Sector 84 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 84 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 78 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 36,053 acres, worked by 30.8 miles of shoreline. A shoreline index of 1.2 says round and simple: fish relate to depth changes here, not shoreline features. Roughly 4% of the water is 15 ft or less, the band where the food chain lives. End to end it runs roughly 8.4 mi, about 7.1 mi across. Gulf St Vincent - Sector 10 sits 6 mi north — 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 |
|---|---|---|
| sand flathead (Sand Flathead) | 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 sand flathead on Spencer Gulf - Sector 84 hold shallow, usually 8 to 35 ft. They move out to 16 to 78 ft in summer and finish the year down in 8 to 35 ft. Put Deepest basin first on the milk run — a deep basin near 76 ft that grades prime for 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 (30 ft) | see map |
| Summer | 16 to 78 ft | dawn & dusk | Deepest basin (76 ft) | see map |
| Fall | 8 to 56 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Winter | 8 to 35 ft | dawn | Sharp break (30 ft) | see map |
Spring puts australian salmon in skinny water — 4 to 30 ft is the zone. As the season builds they drop to 14 to 78 ft, wintering in 4 to 30 ft. Summer australian salmon concentrate at Sharp break, a prime-rated drop-off around 44 ft. 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 | Sharp break (30 ft) | see map |
| Summer | 14 to 78 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Winter | 4 to 30 ft | dawn | Sharp break (30 ft) | see map |
The spring pattern is a shallow one: silver trevally in 4 to 30 ft. Midsummer fish sit out in 14 to 78 ft before dropping to 18 to 78 ft for winter. The spot to know is Sharp break, a drop-off in about 44 ft of water that rates prime for silver trevally in summer. 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 | Sharp break (30 ft) | see map |
| Summer | 14 to 78 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Winter | 18 to 78 ft | midday | Sharp break (44 ft) | see map |
The spring pattern is a shallow one: gummy shark in 8 to 40 ft. Midsummer fish sit out in 12 to 78 ft before dropping to 8 to 40 ft for winter. The spot to know is Deepest basin, a deep basin in about 76 ft of water that rates prime for gummy shark in summer. 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 (30 ft) | see map |
| Summer | 12 to 78 ft | dawn & dusk | Deepest basin (76 ft) | see map |
| Fall | 7 to 78 ft | dawn & dusk | Deepest basin (76 ft) | see map |
| Winter | 8 to 40 ft | dawn | Sharp break (30 ft) | see map |
When the water first warms, yellowtail kingfish slide up into 8 to 45 ft. By summer they slide out to 12 to 78 ft, and by winter most fish are in 16 to 78 ft. If you only fish one area, make it Sharp break: a drop-off around 44 ft that scores prime in summer. In summer the feeding windows fall in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 45 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Summer | 12 to 78 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Fall | 7 to 78 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Winter | 16 to 78 ft | midday | Sharp break (44 ft) | see map |
Come spring, look for mulloway tight to the bank in 5 to 30 ft. They move out to 11 to 78 ft in summer and finish the year down in 14 to 78 ft. If you only fish one area, make it Deepest basin: a deep basin around 76 ft that scores prime in summer. Best bite is early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 30 ft | dawn & dusk | Sharp break (30 ft) | see map |
| Summer | 11 to 78 ft | dawn & dusk | Deepest basin (76 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Deepest basin (76 ft) | see map |
| Winter | 14 to 78 ft | midday | Deepest basin (76 ft) | see map |
Spencer Gulf - Sector 84 carries 6 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 76 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 84 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 84 is about 78 ft (24 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 sand flathead, australian salmon, silver trevally, gummy shark, yellowtail kingfish, mulloway roster for Spencer Gulf - Sector 84. 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 76 ft of water that rates prime for sand flathead in summer. The interactive chart above rates every spot for each species and season.
For sand flathead, 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 84 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 10 6 mi · Gulf St Vincent - Sector 14 8 mi · Gulf St Vincent - Sector 15 15 mi · Spencer Gulf - Sector 90 20 mi · Gulf St Vincent - Sector 19 26 mi · Spencer Gulf - Sector 98 29 mi · Spencer Gulf - Sector 97 37 mi · Gulf St Vincent - Sector 22 40 mi · Spencer Gulf - Sector 105 43 mi · Gulf St Vincent - Sector 21 44 mi · Spencer Gulf - Sector 103 56 mi · Gulf St Vincent - Sector 26 57 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.