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8,157-acre Frederick Henry Bay. Northwest 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. Northwest trip-scale surveyed footprint within Frederick Henry Bay. A broad southeast bay of sand flats, rocky points and channels opening into Storm Bay. The displayed footprint is not a legal boundary or a claim of complete named-water coverage. The water tops out around 92 ft. The depth chart comes from Geoscience Australia / AusSeabed bathymetric survey data, so the contours are survey-derived rather than computer-modeled. The rest of this page walks each species through its year, using the map's own scoring.
On the chart, Frederick Henry Bay - Northwest draws 8,157 acres inside 28.3 miles of shoreline. The 2.2 development index tells the story — a convoluted bank whose fishable edge far outruns the acreage. About 18% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. The basin spans about 8.8 mi end to end and 2.9 mi across at its widest. The nearest mapped water is Storm Bay - Sector 06, 9 mi to the south.
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 | — |
Official species-evidence source.
In spring, sand flathead run shallow here, mostly 8 to 35 ft. Midsummer fish sit out in 16 to 80 ft before dropping to 8 to 35 ft for winter. Summer sand flathead concentrate at Sharp break, a good-rated drop-off around 54 ft. 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 | Shoreline point (23 ft) | see map |
| Summer | 16 to 80 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Fall | 8 to 56 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Winter | 8 to 35 ft | dawn | Shoreline point (23 ft) | see map |
Come spring, look for australian salmon tight to the bank in 4 to 30 ft. They move out to 14 to 80 ft in summer and finish the year down in 4 to 30 ft. If you only fish one area, make it Sharp break: a drop-off around 54 ft that scores prime in 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 (23 ft) | see map |
| Summer | 14 to 80 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Winter | 4 to 30 ft | dawn | Shoreline point (23 ft) | see map |
Early season silver trevally use the shallows, holding in 4 to 30 ft. Expect a summer slide to 14 to 80 ft, then a winter hold in 18 to 80 ft. Put Sharp break first on the milk run — a drop-off near 54 ft that grades prime for 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 | Shoreline point (23 ft) | see map |
| Summer | 14 to 80 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Fall | 4 to 56 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Winter | 18 to 80 ft | midday | Sharp break (54 ft) | see map |
Early season gummy shark use the shallows, holding in 8 to 40 ft. Expect a summer slide to 14 to 92 ft, then a winter hold in 8 to 40 ft. Put Deepest basin first on the milk run — a deep basin near 92 ft that grades prime 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 40 ft | dawn & dusk | Shoreline point (23 ft) | see map |
| Summer | 14 to 92 ft | dawn & dusk | Deepest basin (92 ft) | see map |
| Fall | 8 to 84 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Winter | 8 to 40 ft | dawn | Shoreline point (23 ft) | see map |
The spring pattern is a shallow one: yellowtail kingfish in 8 to 45 ft. As the season builds they drop to 14 to 92 ft, wintering in 19 to 92 ft. Top water on the chart: Shoreline point, a point in the 23 ft range, prime in spring. Time it for early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 45 ft | dawn & dusk | Shoreline point (23 ft) | see map |
| Summer | 14 to 92 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Fall | 8 to 91 ft | dawn & dusk | Sharp break (54 ft) | see map |
| Winter | 19 to 92 ft | midday | Sharp break (54 ft) | see map |
Frederick Henry Bay - Northwest carries 5 mapped structure features, topping out (or rather bottoming out) at Deepest basin, about 92 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 Frederick Henry Bay - Northwest 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 →
Frederick Henry Bay - Northwest is about 92 ft (28 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, australian salmon, silver trevally, gummy shark, yellowtail kingfish roster for Frederick Henry Bay - Northwest. 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 54 ft of water that rates prime for australian salmon 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 Frederick Henry Bay - Northwest 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.
Storm Bay - Sector 06 9 mi · Storm Bay - Sector 10 24 mi · Storm Bay - Sector 11 30 mi · Storm Bay - Sector 04 33 mi · Great Oyster Bay - Sector 10 38 mi · Storm Bay - Sector 14 38 mi · Great Oyster Bay - Sector 11 47 mi · Great Oyster Bay - Sector 08 58 mi · Great Oyster Bay - Sector 09 64 mi · Great Oyster Bay - Sector 05 66 mi · Great Oyster Bay - Sector 06 75 mi · Macquarie Harbour - West 118 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.