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27,115-acre Great Oyster Bay. Sector 05 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 05 trip-scale surveyed footprint within Great Oyster Bay. A large east-coast bay between Freycinet and the mainland, with beaches, reef points and deep central water. 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. Here's the year, species by species, as the scoring engine sees it.
Traced from the shoreline, Great Oyster Bay - Sector 05 runs 27,115 acres with 25.9 miles of edge. Its 1.1 shoreline index means few bank features; the contours below do the pattern work. The shallow band under 15 ft claims about 9% of the surface — that's where the groceries are. The basin spans about 8 mi end to end and 5.8 mi across at its widest. For a second option, Great Oyster Bay - Sector 06 lies 9 mi northeast.
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 | — |
| 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 | — |
Official species-evidence source.
Start shallow in spring: sand flathead sit in 8 to 35 ft that time of year. Warm water sends them out to 16 to 78 ft; cold water stacks them in 8 to 35 ft. Top water on the chart: Deepest basin, a deep basin in the 69 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 35 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Summer | 16 to 78 ft | dawn & dusk | Deepest basin (69 ft) | see map |
| Fall | 8 to 56 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 8 to 35 ft | dawn | Sharp break (10 ft) | see map |
When the water first warms, black bream slide up into 2 to 16 ft. By summer they slide out to 7 to 35 ft, and by winter most fish are in 2 to 16 ft. If you only fish one area, make it Sharp break: a drop-off around 10 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 | 2 to 16 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Summer | 7 to 35 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 |
Early season australian salmon use the shallows, holding in 4 to 30 ft. Summer is a 14 to 78 ft game here, winter a 4 to 30 ft one. The chart's best answer is Sharp break — drop-off, 48 ft, prime for summer. Best bite is early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 30 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Summer | 14 to 78 ft | dawn & dusk | Sharp break (48 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 4 to 30 ft | dawn | Sharp break (10 ft) | see map |
When the water first warms, silver trevally slide up into 4 to 30 ft. By summer they slide out to 14 to 78 ft, and by winter most fish are in 18 to 78 ft. If you only fish one area, make it Sharp break: a drop-off around 48 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 | 4 to 30 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Summer | 14 to 78 ft | dawn & dusk | Sharp break (48 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 18 to 78 ft | midday | Sharp break (48 ft) | see map |
When the water first warms, gummy shark slide up into 8 to 40 ft. By summer they slide out to 12 to 78 ft, and by winter most fish are in 8 to 40 ft. If you only fish one area, make it Deepest basin: a deep basin around 69 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 40 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Summer | 12 to 78 ft | dawn & dusk | Deepest basin (69 ft) | see map |
| Fall | 7 to 78 ft | dawn & dusk | Deepest basin (69 ft) | see map |
| Winter | 8 to 40 ft | dawn | Sharp break (10 ft) | see map |
In spring, yellowtail kingfish run shallow here, mostly 8 to 45 ft. Summer pushes them deeper, 12 to 78 ft, and winter fish settle into 16 to 78 ft. Sharp break is the standout, a drop-off at roughly 48 ft, rated prime for summer yellowtail kingfish. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 45 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Summer | 12 to 78 ft | dawn & dusk | Sharp break (48 ft) | see map |
| Fall | 7 to 78 ft | dawn & dusk | Sharp break (10 ft) | see map |
| Winter | 16 to 78 ft | midday | Sharp break (48 ft) | see map |
Great Oyster Bay - Sector 05 carries 5 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 69 ft down.
No facility from the cited Marine and Safety Tasmania boating 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://mast.tas.gov.au/recreational/boating-facilities/
Private land and private launches need the owner's permission — please ask first.
Season dates, license requirements, and size and bag limits for Tasmania waters are set by the Fishing Tasmania (current recreational sea-fishing rules) — and special regulations can apply to Great Oyster Bay - Sector 05 specifically, so confirm the current rules before you fish. Check Fishing Tasmania's live sea-fishing rules and licensing pages before every trip. Current species limits, licences for particular fisheries, seasonal and area closures, marine reserves, protected species, gear controls and biosecurity measures may apply. A directly measured depth footprint, fishing-spot marker or access lead is planning context only and never grants permission to fish, keep catch, enter private or port land, park or launch.
Check the official Tasmania fishing regulations →
Fishing Tasmania species and licence information →
Check special-area and water-specific rules →
Great Oyster Bay - Sector 05 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 Tasmania Department of Natural Resources and Environment regional evidence informs the sand flathead, black bream, australian salmon, silver trevally, gummy shark, yellowtail kingfish roster for Great Oyster Bay - Sector 05. 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 69 ft of water that rates prime for sand flathead in summer. Scroll up to the map for the complete spot list by 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 Great Oyster Bay - Sector 05 is regulated by the Fishing Tasmania (current recreational sea-fishing rules). Check the official Tasmania regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Great Oyster Bay - Sector 06 9 mi · Great Oyster Bay - Sector 08 10 mi · Great Oyster Bay - Sector 09 13 mi · Great Oyster Bay - Sector 11 25 mi · Great Oyster Bay - Sector 10 31 mi · Storm Bay - Sector 04 46 mi · Frederick Henry Bay - Northwest 66 mi · Storm Bay - Sector 06 73 mi · Storm Bay - Sector 11 80 mi · Storm Bay - Sector 10 83 mi · Great Musselroe Bay - West 87 mi · St Albans Bay 95 mi
Browse all Tasmania 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.