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2,347-acre Plymouth Harbor fishing map with NOAA BlueTopo survey contours (90.6% measured, 99.65% assessed), charted rock and wreck structure, regional fish-survey occurrence, sourced forage timing and verified public access. The water tops out around 37 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. Here is how the season plays out for each species, straight from the data behind the map.
Plymouth Harbor maps at 2,345 acres behind 12.8 miles of shoreline — one island included. With a 1.9 development index there's bank structure worth casting at, in moderation. Littoral water — the productive band under ~15 ft — makes up 89% of this chart. Call it 4.1 mi long by 1.5 mi wide at the broadest reach. If the bite dies, Little Pond is 2 mi to the southwest.
Start shallow in spring: striped bass sit in 5 to 20 ft that time of year. Warm water sends them out to 11 to 37 ft; cold water stacks them in 11 to 37 ft. Top water on the chart: Surveyed channel edge, a drop-off in the 15 ft range, prime in summer. Fish it in early morning and the evening and you'll meet the bite. Throw a flutter spoon (deep) or an umbrella rig (trolled) until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Surveyed channel edge (15 ft) | Bucktail jig + trailer, Walking topwater (dawn) |
| Summer | 11 to 37 ft | dawn & dusk | Surveyed channel edge (15 ft) | Flutter spoon (deep), Umbrella rig (trolled) |
| Fall | 10 to 35 ft | dawn & dusk | Surveyed channel edge (15 ft) | Topwater walker, Jerkbait |
| Winter | 11 to 37 ft | midday | Surveyed channel edge (15 ft) | Alabama rig (slow), Flutter spoon |
Early season bluefish use the shallows, holding in 3 to 20 ft. Summer is a 5 to 30 ft game here, winter an 11 to 37 ft one. The chart's best answer is Surveyed channel edge — drop-off, 15 ft, prime for summer. Best bite is early morning and the evening. Tie on a popper (early/late) or a metal jigs in the rips and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 20 ft | dawn & dusk | Shallow feeding flat (8 ft) | Metal (Hopkins/Kastmaster), Pencil popper |
| Summer | 5 to 30 ft | dawn & dusk | Surveyed channel edge (15 ft) | Popper (early/late), Metal jigs in the rips |
| Fall | 3 to 25 ft | dawn & midday | Shallow feeding flat (8 ft) | Pencil popper, Big metal |
| Winter | 11 to 37 ft | midday | Surveyed channel edge (15 ft) | Metal jig worked slow (southern waters) |
Spring puts summer flounder (fluke) in skinny water — 5 to 25 ft is the zone. Warm water sends them out to 8 to 35 ft; cold water stacks them in 11 to 37 ft. Surveyed channel edge is the standout, a drop-off at roughly 15 ft, rated prime for summer summer flounder (fluke). Plan around midday and early morning in the warm months. A bucktail (1-3 oz by drift speed) or a gulp grub on jighead covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | midday & dawn | Surveyed channel edge (15 ft) | Bucktail + Gulp swimming mullet, Hi-lo rig + squid strip |
| Summer | 8 to 35 ft | midday & dawn | Surveyed channel edge (15 ft) | Bucktail (1-3 oz by drift speed), Gulp grub on jighead |
| Fall | 10 to 37 ft | midday | Surveyed channel edge (15 ft) | Heavier bucktail on the lumps, Big Gulp 6" grub |
| Winter | 11 to 37 ft | midday | Surveyed channel edge (15 ft) | Slow bottom rig + strip |
Start shallow in spring: black sea bass sit in 9 to 37 ft that time of year. They don't go far with the seasons — 9 to 37 ft covers summer, 11 to 37 ft covers winter. Top water on the chart: NOAA charted underwater rock, a rock pile in the 10 ft range, prime in spring. Fish it in midday and early morning and you'll meet the bite. Throw a bucktail + grub or a diamond jig + squid teaser until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 9 to 37 ft | midday & dawn | NOAA charted underwater rock (10 ft) | Hi-lo rig + squid, 1-2 oz bucktail + Gulp |
| Summer | 9 to 37 ft | midday & dawn | NOAA charted underwater rock (10 ft) | Bucktail + grub, Diamond jig + squid teaser |
| Fall | 9 to 37 ft | midday | NOAA charted underwater rock (10 ft) | 3-4 oz vertical jig (deep), Double-teaser rig |
| Winter | 11 to 37 ft | midday | NOAA charted underwater rock (10 ft) | Heavy hi-lo rig on deep wrecks |
When the water first warms, tautog (blackfish) slide up into 5 to 25 ft. By summer they slide out to 10 to 35 ft, and by winter most fish are in 11 to 37 ft. If you only fish one area, make it Dangerous NOAA charted wreck: a wreck around 6 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a 1/2-1 oz tog jig + crab rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | midday & dawn | Dangerous NOAA charted wreck (6 ft) | Tog jig + green crab half, Bare jig + clam (early) |
| Summer | 10 to 35 ft | dawn | Dangerous NOAA charted wreck (15 ft) | 1/2-1 oz tog jig + crab |
| Fall | 7 to 37 ft | midday | Dangerous NOAA charted wreck (15 ft) | Tog jig + whole green crab, Old-school rig + double crab (deep) |
| Winter | 11 to 37 ft | midday | Dangerous NOAA charted wreck (15 ft) | Heavy jig + crab on deep structure |
Count 22 structure marks on this chart. The deepest, Dangerous NOAA charted wreck, sits near 15 ft.
Access data: Massachusetts public water-access inventory. 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 Plymouth Harbor specifically, so confirm the current rules before you fish.
Check the official Massachusetts fishing regulations →
Plymouth Harbor is about 37 ft (11 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 Plymouth Harbor.
Surveyed channel edge is the top-rated area: a drop-off in about 15 ft of water that rates prime for summer flounder (fluke) in summer. The map above holds the full rated-spot list for every 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 Plymouth 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.
Little Pond 2 mi · Plymouth Bay 2 mi · Billington Sea 3 mi · Warren Cove 3 mi · Duxbury Bay 4 mi · Curlew Pond 6 mi · Fresh Pond 7 mi · Little Long Pond 7 mi · Long Pond (Plymouth) 8 mi · Long Pond (Plymouth) 8 mi · Halfway Pond 8 mi · Sampson Pond 9 mi
See how Plymouth 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; 91% measured, 9% 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.