Sign inSign up free Sign inSign up free Sign inSign up freeShared by DepthScout anglers. Exact spots stay private, always.
359-acre Cape Porpoise Harbor fishing map with NOAA BlueTopo survey contours (99.13% measured, 100% assessed), charted rock and wreck structure, regional fish-survey occurrence, sourced forage timing and verified public access. The water tops out around 59 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. The rest of this page walks each species through its year, using the map's own scoring.
Traced from the shoreline, Cape Porpoise Harbor runs 359 acres with 8 miles of edge — 13 islands included. An index of 3 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. Littoral water — the productive band under ~15 ft — makes up 89% of this chart. End to end it runs roughly 1.3 mi, about 0.9 mi across. For a second option, Stage Island Harbor lies 0 mi northeast.
Early season striped bass use the shallows, holding in 5 to 20 ft. Expect a summer slide to 18 to 59 ft, then a winter hold in 20 to 50 ft. Put Surveyed channel edge first on the milk run — a drop-off near 18 ft that grades prime for summer. In summer the feeding windows fall in 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 (18 ft) | Bucktail jig + trailer, Walking topwater (dawn) |
| Summer | 18 to 59 ft | dawn & dusk | Surveyed channel edge (18 ft) | Flutter spoon (deep), Umbrella rig (trolled) |
| Fall | 10 to 35 ft | dawn & dusk | Surveyed channel edge (18 ft) | Topwater walker, Jerkbait |
| Winter | 20 to 50 ft | midday | Surveyed channel edge (18 ft) | Alabama rig (slow), Flutter spoon |
In spring, bluefish run shallow here, mostly 3 to 20 ft. Midsummer fish sit out in 5 to 30 ft before dropping to 15 to 40 ft for winter. Summer bluefish concentrate at Surveyed channel edge, a prime-rated drop-off around 18 ft. Fish it in early morning and the evening and you'll meet the bite. 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 | Surveyed channel edge (18 ft) | Metal (Hopkins/Kastmaster), Pencil popper |
| Summer | 5 to 30 ft | dawn & dusk | Surveyed channel edge (18 ft) | Popper (early/late), Metal jigs in the rips |
| Fall | 3 to 25 ft | dawn & midday | Surveyed channel edge (18 ft) | Pencil popper, Big metal |
| Winter | 15 to 40 ft | midday | Surveyed channel edge (18 ft) | Metal jig worked slow (southern waters) |
Spring atlantic mackerel on Cape Porpoise Harbor hold shallow, usually 5 to 45 ft. They move out to 11 to 59 ft in summer and finish the year down in 15 to 59 ft. Put Surveyed channel edge first on the milk run — a drop-off near 18 ft that grades prime for summer. The feeding windows run early morning and the evening. The summer box starts with a feather rig or a small vertical jig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 45 ft | dawn & dusk | Surveyed channel edge (18 ft) | Mackerel feather rig, Small silver jig |
| Summer | 11 to 59 ft | dawn & dusk | Surveyed channel edge (18 ft) | Feather rig, Small vertical jig |
| Fall | 9 to 59 ft | dawn & dusk | Surveyed channel edge (18 ft) | Compact silver jig, Sparse feather rig |
| Winter | 15 to 59 ft | midday | Surveyed channel edge (18 ft) | Small deep jig |
When the water first warms, atlantic cod slide up into 12 to 59 ft. There's no big seasonal slide here — summer means 15 to 59 ft, winter 13 to 59 ft. Start at NOAA charted underwater rock. It's a rock pile holding about 17 ft of water and rates prime come spring. The feeding windows run early morning. Keep a heavy metal jig or a large soft-plastic jig rigged through the warm months.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 12 to 59 ft | dawn | NOAA charted underwater rock (17 ft) | Diamond jig, Heavy bucktail |
| Summer | 15 to 59 ft | dawn | NOAA charted underwater rock (17 ft) | Heavy metal jig, Large soft-plastic jig |
| Fall | 11 to 59 ft | dawn | NOAA charted underwater rock (17 ft) | Diamond jig, Bucktail with teaser |
| Winter | 13 to 59 ft | midday | NOAA charted underwater rock (17 ft) | Heavy vertical jig |
Spring puts atlantic herring in skinny water — 5 to 25 ft is the zone. Warm water sends them out to 15 to 50 ft; cold water stacks them in 18 to 59 ft. Surveyed channel edge is the standout, a drop-off at roughly 18 ft, rated prime for summer atlantic herring. Plan around early morning and the evening in the warm months. A herring feather rig or a small silver jig covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | NOAA charted underwater rock (6 ft) | Small herring feather rig, Micro jig rig |
| Summer | 15 to 50 ft | dawn & dusk | Surveyed channel edge (18 ft) | Herring feather rig, Small silver jig |
| Fall | 10 to 40 ft | dawn & dusk | Surveyed channel edge (18 ft) | Small feather rig, Compact silver spoon |
| Winter | 18 to 59 ft | midday | Surveyed channel edge (18 ft) | Small silver jig, Sparse feather rig |
Count 27 structure marks on this chart. The deepest, Surveyed channel edge, sits near 18 ft.
Access data: Maine DMR — Kittery to Cape Elizabeth coastal anglers guide. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Maine waters are set by the Maine DMR (saltwater recreational fishing) — and special regulations can apply to Cape Porpoise Harbor specifically, so confirm the current rules before you fish.
Check the official Maine fishing regulations →
Cape Porpoise Harbor is about 59 ft (18 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, atlantic mackerel, atlantic cod, atlantic herring on Cape Porpoise Harbor.
NOAA charted underwater rock is the top-rated area: a rock pile in about 17 ft of water that rates prime for atlantic cod in spring. The interactive chart above rates every spot for each 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 Cape Porpoise Harbor is regulated by the Maine DMR (saltwater recreational fishing). Check the official Maine regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Stage Island Harbor 0 mi · Goosefare Bay 2 mi · Curtis Cove 3 mi · Wells Harbor 7 mi · Wood Island Harbor 7 mi · Saco Bay 11 mi · Cape Neddick Harbor 15 mi · Richmond Island Harbor 16 mi · Shaker Pond 17 mi · Dyer Cove 18 mi · Fore River 22 mi · Whitehead Passage 23 mi
See how Cape Porpoise Harbor stacks up: best striped bass lakes in Maine · best bluefish lakes in Maine · best atlantic herring lakes in Maine · best atlantic mackerel lakes in Maine
Browse all Maine fishing maps or see every water on DepthScout. Bathymetry credit: NOAA BlueTopo (NAVD88; 99% measured, 1% 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.