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139,620-acre Spencer Gulf. Sector 66 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 66 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 123 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 139,616 acres, worked by 58.8 miles of shoreline. A shoreline index of 1.1 says round and simple: fish relate to depth changes here, not shoreline features. Roughly 1% of the water is 15 ft or less, the band where the food chain lives. End to end it runs roughly 21.1 mi, about 16.3 mi across. Spencer Gulf - Sector 73 sits 12 mi south — 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 | — |
| 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. Summer is a 16 to 80 ft game here, winter an 8 to 35 ft one. The chart's best answer is Sharp break — drop-off, 83 ft, good for summer. Best bite is 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 (83 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. Warm water sends them out to 18 to 120 ft; cold water stacks them in 8 to 40 ft. Top water on the chart: Sharp break, a drop-off in the 83 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 | 8 to 40 ft | dawn & dusk | open water | see map |
| Summer | 18 to 120 ft | dawn & dusk | Sharp break (83 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (83 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. Summer is a 14 to 100 ft game here, winter an 18 to 100 ft one. Start at Sharp break. It's a drop-off holding about 83 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 | 5 to 30 ft | dawn & dusk | open water | see map |
| Summer | 14 to 100 ft | dawn & dusk | Sharp break (83 ft) | see map |
| Fall | 5 to 70 ft | dawn & dusk | Sharp break (83 ft) | see map |
| Winter | 18 to 100 ft | midday | Sharp break (83 ft) | see map |
Spencer Gulf - Sector 66 carries 6 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 122 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 66 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 66 is about 123 ft (37 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 66. 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 83 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 66 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 73 12 mi · Spencer Gulf - Sector 65 14 mi · Spencer Gulf - Sector 59 15 mi · Spencer Gulf - Sector 72 20 mi · Spencer Gulf - Sector 60 21 mi · Spencer Gulf - Sector 52 25 mi · Spencer Gulf - Sector 64 26 mi · Spencer Gulf - Sector 53 29 mi · Spencer Gulf - Sector 61 33 mi · Spencer Gulf - Sector 71 35 mi · Spencer Gulf - Sector 78 45 mi · Spencer Gulf - Sector 90 69 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.