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4,340-acre Great Oyster Bay. Sector 10 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 10 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 75 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The season-by-season read for each species follows, from the map's own numbers.
Drawn out, this is 4,340 acres of water rimmed by 16.9 miles of bank. The shoreline is moderately structured (index 1.8) — enough points and pockets to pattern. Littoral water — the productive band under ~15 ft — makes up 35% of this chart. End to end it runs roughly 4.4 mi, about 3.8 mi across. The nearest mapped water is Great Oyster Bay - Sector 11, 10 mi to the 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.
In spring, sand flathead run shallow here, mostly 8 to 35 ft. Summer pushes them deeper, 15 to 75 ft, and winter fish settle into 8 to 35 ft. Deepest basin is the standout, a deep basin at roughly 68 ft, rated prime for summer sand flathead. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dawn & dusk | Shoreline point (9 ft) | see map |
| Summer | 15 to 75 ft | dawn & dusk | Deepest basin (68 ft) | see map |
| Fall | 8 to 56 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Winter | 8 to 35 ft | dawn | Shoreline point (9 ft) | see map |
Early season black bream use the shallows, holding in 2 to 16 ft. Summer is a 7 to 35 ft game here, winter a 2 to 16 ft one. The chart's best answer is Shoreline point — point, 9 ft, good for spring. Best bite is early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 16 ft | dawn & dusk | Shoreline point (9 ft) | see map |
| Summer | 7 to 35 ft | dawn & dusk | open water | see map |
| Fall | 2 to 25 ft | dawn & dusk | open water | see map |
| Winter | 2 to 16 ft | dawn | Shoreline point (9 ft) | see map |
Come spring, look for australian salmon tight to the bank in 4 to 30 ft. Expect a summer slide to 13 to 75 ft, then a winter hold in 4 to 30 ft. Start at Sharp break. It's a drop-off holding about 44 ft of water and rates prime come summer. Prime time lands in early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 30 ft | dawn & dusk | Shoreline point (9 ft) | see map |
| Summer | 13 to 75 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 | Shoreline point (9 ft) | see map |
Early season silver trevally use the shallows, holding in 4 to 30 ft. Summer is a 13 to 75 ft game here, winter a 17 to 75 ft one. The chart's best answer is Sharp break — drop-off, 44 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 | Shoreline point (9 ft) | see map |
| Summer | 13 to 75 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Winter | 17 to 75 ft | midday | Sharp break (44 ft) | see map |
Early season gummy shark use the shallows, holding in 8 to 40 ft. Summer is an 11 to 75 ft game here, winter an 8 to 40 ft one. The chart's best answer is Deepest basin — deep basin, 68 ft, prime for summer. Best bite is early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 40 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Summer | 11 to 75 ft | dawn & dusk | Deepest basin (68 ft) | see map |
| Fall | 7 to 75 ft | dawn & dusk | Deepest basin (68 ft) | see map |
| Winter | 8 to 40 ft | dawn | Sharp break (44 ft) | see map |
The spring pattern is a shallow one: yellowtail kingfish in 8 to 45 ft. Midsummer fish sit out in 12 to 75 ft before dropping to 16 to 75 ft for winter. The spot to know is Shoreline point, a point in about 9 ft of water that rates prime for yellowtail kingfish in spring. Plan around early morning and the evening in the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 45 ft | dawn & dusk | Shoreline point (9 ft) | see map |
| Summer | 12 to 75 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Fall | 7 to 75 ft | dawn & dusk | Sharp break (44 ft) | see map |
| Winter | 16 to 75 ft | midday | Sharp break (44 ft) | see map |
Count 4 structure marks on this chart. The deepest, Deepest basin, sits near 68 ft.
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 10 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 10 is about 75 ft (23 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 10. 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 68 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 Great Oyster Bay - Sector 10 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 11 10 mi · Storm Bay - Sector 04 17 mi · Great Oyster Bay - Sector 08 21 mi · Great Oyster Bay - Sector 09 27 mi · Great Oyster Bay - Sector 05 31 mi · Frederick Henry Bay - Northwest 38 mi · Great Oyster Bay - Sector 06 38 mi · Storm Bay - Sector 06 42 mi · Storm Bay - Sector 11 49 mi · Storm Bay - Sector 10 52 mi · Storm Bay - Sector 14 67 mi · Great Musselroe Bay - West 117 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.