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87,624-acre Spencer Gulf. Sector 105 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 105 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 142 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Here is how the season plays out for each species, straight from the data behind the map.
The outline encloses 87,626 acres, worked by 79.8 miles of shoreline. With a 1.9 development index there's bank structure worth casting at, in moderation. The shallow band under 15 ft claims about 2% of the surface — that's where the groceries are. End to end it runs roughly 17.3 mi, about 14.8 mi across. Its nearest charted neighbour, Gulf St Vincent - Sector 22, is 3 mi to the north.
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 | — |
| gummy shark (Gummy Shark) | official species listing | — |
| mulloway (Mulloway) | official species listing | — |
Official species-evidence source.
Early season sand flathead use the shallows, holding in 8 to 35 ft. Expect a summer slide to 16 to 80 ft, then a winter hold in 8 to 35 ft. Put Sharp break first on the milk run — a drop-off near 85 ft that grades good for 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 35 ft | dawn & dusk | open water | see map |
| Summer | 16 to 80 ft | dawn & dusk | Sharp break (85 ft) | see map |
| Fall | 8 to 56 ft | dawn & dusk | open water | see map |
| Winter | 8 to 35 ft | dawn | open water | see map |
Start shallow in spring: gummy shark sit in 8 to 40 ft that time of year. Summer pushes them deeper, 18 to 120 ft, and winter fish settle into 8 to 40 ft. The spot to know is Sharp break, a drop-off in about 85 ft of water that rates prime for gummy shark in summer. Warm-month bites cluster around early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | open water | see map |
| Summer | 18 to 120 ft | dawn & dusk | Sharp break (85 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (85 ft) | see map |
| Winter | 8 to 40 ft | dawn | open water | see map |
When the water first warms, mulloway slide up into 5 to 30 ft. By summer they slide out to 14 to 100 ft, and by winter most fish are in 18 to 100 ft. If you only fish one area, make it Sharp break: a drop-off around 85 ft that scores good in summer. In summer the feeding windows fall in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 30 ft | dawn & dusk | open water | see map |
| Summer | 14 to 100 ft | dawn & dusk | Sharp break (85 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Sharp break (85 ft) | see map |
| Winter | 18 to 100 ft | midday | Sharp break (85 ft) | see map |
Structure-wise the chart holds 6 features, led in depth by Deepest basin at roughly 141 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 105 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 105 is about 142 ft (43 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, gummy shark, mulloway roster for Spencer Gulf - Sector 105. 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 85 ft of water that rates prime for gummy shark 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 105 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 22 3 mi · Gulf St Vincent - Sector 26 14 mi · Spencer Gulf - Sector 98 14 mi · Gulf St Vincent - Sector 21 15 mi · Spencer Gulf - Sector 97 16 mi · Gulf St Vincent - Sector 19 22 mi · Gulf St Vincent - Sector 29 28 mi · Spencer Gulf - Sector 103 30 mi · Gulf St Vincent - Sector 30 31 mi · Spencer Gulf - Sector 90 35 mi · Gulf St Vincent - Sector 14 35 mi · Gulf St Vincent - Sector 15 36 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.