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1,344-acre Sippican Harbor fishing map with NOAA BlueTopo survey contours (79.28% measured, 100% assessed), charted rock and wreck structure, regional fish-survey occurrence, sourced forage timing and verified public access. The water tops out around 25 ft. The depth chart is built from real agency bathymetry referenced to NAVD88; directly measured coverage remains distinguished from source interpolation. The channels, holes and drop-offs come from the source data, not a distance-from-shore model. Below is the species-by-species picture, pulled from the same data the map uses.
Drawn out, this is 1,343 acres of water rimmed by 13.7 miles of bank, with 5 islands in the mix. An index of 2.7 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. Roughly 69% of the water is 15 ft or less, the band where the food chain lives. End to end it runs roughly 3.2 mi, about 1.3 mi across. For a second option, Aucoot Cove lies 2 mi south.
Early season striped bass use the shallows, holding in 5 to 20 ft. Summer is an 8 to 25 ft game here, winter an 8 to 25 ft one. The chart's best answer is Surveyed channel edge — drop-off, 11 ft, prime for summer. Best bite is early morning and the evening. Tie on a flutter spoon (deep) or an umbrella rig (trolled) and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Surveyed channel edge (11 ft) | Bucktail jig + trailer, Walking topwater (dawn) |
| Summer | 8 to 25 ft | dawn & dusk | Surveyed channel edge (11 ft) | Flutter spoon (deep), Umbrella rig (trolled) |
| Fall | 7 to 25 ft | dawn & dusk | Surveyed channel edge (11 ft) | Topwater walker, Jerkbait |
| Winter | 8 to 25 ft | midday | Surveyed channel edge (11 ft) | Alabama rig (slow), Flutter spoon |
In spring, bluefish run shallow here, mostly 3 to 20 ft. Summer pushes them deeper, 4 to 25 ft, and winter fish settle into 8 to 25 ft. Surveyed channel edge is the standout, a drop-off at roughly 11 ft, rated prime for summer bluefish. Time it for early morning and the evening. You won't need more than a popper (early/late) or a metal jigs in the rips most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 20 ft | dawn & dusk | Shallow feeding flat (20 ft) | Metal (Hopkins/Kastmaster), Pencil popper |
| Summer | 4 to 25 ft | dawn & dusk | Surveyed channel edge (11 ft) | Popper (early/late), Metal jigs in the rips |
| Fall | 3 to 25 ft | dawn & midday | Shallow feeding flat (20 ft) | Pencil popper, Big metal |
| Winter | 8 to 25 ft | midday | Surveyed channel edge (11 ft) | Metal jig worked slow (southern waters) |
Spring summer flounder (fluke) on Sippican Harbor hold shallow, usually 5 to 25 ft. Depth-wise the year is flat: 6 to 25 ft in summer, 8 to 25 ft once it turns cold. The chart's best answer is Surveyed channel edge — drop-off, 11 ft, prime for summer. Prime time lands in midday and early morning. The summer box starts with a bucktail (1-3 oz by drift speed) or a gulp grub on jighead.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | midday & dawn | Surveyed channel edge (11 ft) | Bucktail + Gulp swimming mullet, Hi-lo rig + squid strip |
| Summer | 6 to 25 ft | midday & dawn | Surveyed channel edge (11 ft) | Bucktail (1-3 oz by drift speed), Gulp grub on jighead |
| Fall | 7 to 25 ft | midday | Surveyed channel edge (11 ft) | Heavier bucktail on the lumps, Big Gulp 6" grub |
| Winter | 8 to 25 ft | midday | Surveyed channel edge (11 ft) | Slow bottom rig + strip |
Early season black sea bass use the shallows, holding in 6 to 25 ft. Even in summer they hold at 6 to 25 ft; winter keeps them in 8 to 25 ft. The chart's best answer is NOAA charted underwater rock — rock pile, 11 ft, prime for spring. Best bite is midday and early morning. Tie on a bucktail + grub or a diamond jig + squid teaser and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 6 to 25 ft | midday & dawn | NOAA charted underwater rock (11 ft) | Hi-lo rig + squid, 1-2 oz bucktail + Gulp |
| Summer | 6 to 25 ft | midday & dawn | NOAA charted underwater rock (11 ft) | Bucktail + grub, Diamond jig + squid teaser |
| Fall | 6 to 25 ft | midday | NOAA charted underwater rock (11 ft) | 3-4 oz vertical jig (deep), Double-teaser rig |
| Winter | 8 to 25 ft | midday | NOAA charted underwater rock (11 ft) | Heavy hi-lo rig on deep wrecks |
Start shallow in spring: tautog (blackfish) sit in 5 to 25 ft that time of year. They don't go far with the seasons — 7 to 25 ft covers summer, 8 to 25 ft covers winter. Top water on the chart: NOAA charted underwater rock, a rock pile in the 5 ft range, prime in spring. Fish it in early morning and you'll meet the bite. Throw a 1/2-1 oz tog jig + crab until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | midday & dawn | NOAA charted underwater rock (5 ft) | Tog jig + green crab half, Bare jig + clam (early) |
| Summer | 7 to 25 ft | dawn | NOAA charted underwater rock (11 ft) | 1/2-1 oz tog jig + crab |
| Fall | 5 to 25 ft | midday | NOAA charted underwater rock (5 ft) | Tog jig + whole green crab, Old-school rig + double crab (deep) |
| Winter | 8 to 25 ft | midday | NOAA charted underwater rock (11 ft) | Heavy jig + crab on deep structure |
The chart marks 75 structure features on Sippican Harbor; the deepest is Shallow feeding flat at about 20 ft.
Access data: Town of Marion — Old Landing access (resident/permit restrictions apply). Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Massachusetts waters are set by the Massachusetts DMF (recreational saltwater) — and special regulations can apply to Sippican Harbor specifically, so confirm the current rules before you fish.
Check the official Massachusetts fishing regulations →
Sippican Harbor is about 25 ft (8 m) deep at its deepest point. The depth chart is built from real agency bathymetry referenced to NAVD88; directly measured coverage remains distinguished from source interpolation. The contours reflect measured and quality-assessed source depths.
Anglers target striped bass, bluefish, summer flounder (fluke), black sea bass, tautog (blackfish) on Sippican Harbor.
Surveyed channel edge is the top-rated area: a drop-off in about 11 ft of water that rates prime for summer flounder (fluke) in summer. Scroll up to the map for the complete spot list by species and season.
For striped bass, 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 Sippican Harbor is regulated by the Massachusetts DMF (recreational saltwater). Check the official Massachusetts regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Aucoot Cove 2 mi · Marys Pond 5 mi · Pocasset Harbor 6 mi · Dicks Pond 6 mi · Agawam Mill Pond 6 mi · Long Pond (Rochester) 7 mi · Nasketucket Bay 8 mi · Snipatuit Pond 8 mi · Glen Charlie Pond 8 mi · Buzzards Bay 9 mi, MA/RI · Acushnet River 9 mi · White Island Pond W.B. 10 mi
See how Sippican Harbor stacks up: best striped bass lakes in Massachusetts · best summer flounder (fluke) lakes in Massachusetts · best bluefish lakes in Massachusetts · best black sea bass lakes in Massachusetts
Browse all Massachusetts fishing maps or see every water on DepthScout. Bathymetry credit: NOAA BlueTopo (NAVD88; 79% measured, 21% source-interpolated). 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.