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114-acre Harmon Harbor fishing map with NOAA BlueTopo survey contours (90.67% measured, 100% assessed), charted rock and wreck structure, regional fish-survey occurrence, sourced forage timing and verified public access. The water tops out around 57 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 114 acres of water rimmed by 3.8 miles of bank — 5 islands included. An index of 2.5 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. The shallow band under 15 ft claims about 58% of the surface — that's where the groceries are. Tip to tip the water measures near 1.1 mi with a 0.4-mi widest point. Closest neighbour on DepthScout: Five Islands Harbor, 1 mi northeast of here.
When the water first warms, striped bass slide up into 5 to 20 ft. By summer they slide out to 17 to 57 ft, and by winter most fish are in 20 to 50 ft. If you only fish one area, make it Surveyed channel edge: a drop-off around 12 ft that scores good in fall. In summer the feeding windows fall in early morning and the evening. Keep a topwater walker at low light or a paddletail on a light jig rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | Surveyed channel edge (12 ft) | 3-6 inch paddletail, Suspending minnow plug |
| Summer | 17 to 57 ft chart-limited; documented 25 to 60 ft | dawn & dusk | Surveyed channel edge (12 ft) | Topwater walker at low light, Paddletail on a light jig |
| Fall | 10 to 35 ft | dawn & dusk | Surveyed channel edge (12 ft) | Pencil popper, Baitfish swimbait |
| Winter | 20 to 50 ft | midday | open water | Slow paddletail, Bucktail near bottom |
Start shallow in spring: bluefish sit in 3 to 20 ft that time of year. Warm water sends them out to 5 to 30 ft; cold water stacks them in 15 to 40 ft. Top water on the chart: Surveyed channel edge, a drop-off in the 12 ft range, good in summer. Fish it in early morning and the evening and you'll meet the bite. Throw a popper (early/late) or a metal jigs in the rips until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 20 ft | dawn & dusk | Surveyed channel edge (12 ft) | Metal (Hopkins/Kastmaster), Pencil popper |
| Summer | 5 to 30 ft | dawn & dusk | Surveyed channel edge (12 ft) | Popper (early/late), Metal jigs in the rips |
| Fall | 3 to 25 ft | dawn & midday | Surveyed channel edge (12 ft) | Pencil popper, Big metal |
| Winter | 15 to 40 ft | midday | open water | Metal jig worked slow (southern waters) |
When the water first warms, atlantic mackerel slide up into 5 to 45 ft. Summer is an 11 to 57 ft game here, winter a 14 to 57 ft one. Start at Surveyed channel edge. It's a drop-off holding about 12 ft of water and rates good come summer. The feeding windows run early morning and the evening. Keep a feather rig or a small vertical jig rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 45 ft | dawn & dusk | Surveyed channel edge (12 ft) | Mackerel feather rig, Small silver jig |
| Summer | 11 to 57 ft chart-limited; documented 15 to 80 ft | dawn & dusk | Surveyed channel edge (12 ft) | Feather rig, Small vertical jig |
| Fall | 9 to 57 ft chart-limited; documented 10 to 65 ft | dawn & dusk | Surveyed channel edge (12 ft) | Compact silver jig, Sparse feather rig |
| Winter | 14 to 57 ft chart-limited; documented 30 to 120 ft | midday | Surveyed channel edge (12 ft) | Small deep jig |
Spring atlantic cod on Harmon Harbor hold shallow, usually 11 to 57 ft. Depth-wise the year is flat: 14 to 57 ft in summer, 13 to 57 ft once it turns cold. Put NOAA charted underwater rock first on the milk run — a rock pile near 17 ft that grades prime for spring. The feeding windows run early morning. The summer box starts with a heavy metal jig or a large soft-plastic jig.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 11 to 57 ft chart-limited; documented 20 to 100 ft | dawn | NOAA charted underwater rock (17 ft) | Diamond jig, Heavy bucktail |
| Summer | 14 to 57 ft chart-limited; documented 45 to 180 ft | dawn | NOAA charted underwater rock (17 ft) | Heavy metal jig, Large soft-plastic jig |
| Fall | 10 to 57 ft chart-limited; documented 25 to 140 ft | dawn | NOAA charted underwater rock (17 ft) | Diamond jig, Bucktail with teaser |
| Winter | 13 to 57 ft chart-limited; documented 50 to 220 ft | midday | NOAA charted underwater rock (17 ft) | Heavy vertical jig |
The spring pattern is a shallow one: atlantic herring in 5 to 25 ft. Midsummer fish sit out in 15 to 50 ft before dropping to 17 to 57 ft for winter. The spot to know is NOAA charted underwater rock, a rock pile in about 8 ft of water that rates prime for atlantic herring in spring. Plan around early morning and the evening in the warm months. Summer baits: a herring feather rig or a small silver jig gets it done.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | NOAA charted underwater rock (8 ft) | Small herring feather rig, Micro jig rig |
| Summer | 15 to 50 ft | dawn & dusk | Surveyed channel edge (12 ft) | Herring feather rig, Small silver jig |
| Fall | 10 to 40 ft | dawn & dusk | Surveyed channel edge (12 ft) | Small feather rig, Compact silver spoon |
| Winter | 17 to 57 ft chart-limited; documented 20 to 60 ft | midday | Surveyed channel edge (12 ft) | Small silver jig, Sparse feather rig |
Spring winter flounder on Harmon Harbor hold shallow, usually 2 to 18 ft. By summer they slide out to 8 to 30 ft, and by winter most fish are in 3 to 20 ft. The chart's best answer is Surveyed channel edge — drop-off, 12 ft, good for spring. Prime time lands in early morning. The summer box starts with a light scented jig worked slowly.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 18 ft | midday & dawn | Surveyed channel edge (12 ft) | Small bucktail tipped with worm, Scented grub on a light jig |
| Summer | 8 to 30 ft | dawn | Surveyed channel edge (12 ft) | Light scented jig worked slowly |
| Fall | 6 to 25 ft | midday | Surveyed channel edge (12 ft) | Small bucktail + worm, Scented bottom jig |
| Winter | 3 to 20 ft | midday | Surveyed channel edge (12 ft) | Small bucktail tipped with worm |
The chart marks 12 structure features on Harmon Harbor; the deepest is NOAA charted underwater rock at about 17 ft.
Access data: Maine GeoLibrary — Boat Launches (Maine IF&W / DACF). 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 Harmon Harbor specifically, so confirm the current rules before you fish.
Check the official Maine fishing regulations →
Harmon Harbor is about 57 ft (17 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, winter flounder on Harmon Harbor. The list combines the water's survey records with habitat-filtered species from broader official evidence; those additions are plausible occurrences, not exact-water abundance or guaranteed catches.
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. 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 Harmon 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.
Five Islands Harbor 1 mi · Robinhood Cove 2 mi · Ebenecook Harbor 3 mi · Knubble Bay 4 mi · Todd Bay 4 mi · Cape Harbor 4 mi · Sagadahoc Bay 4 mi · Sagadahoc River 4 mi · Hall Bay 4 mi · Boothbay Harbor 5 mi · Sheepscot Bay 5 mi · Stage Island Bay 5 mi
See how Harmon Harbor stacks up: best striped bass lakes in Maine · best winter flounder lakes in Maine · best bluefish lakes in Maine · best atlantic herring lakes in Maine
Browse all Maine fishing maps. 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.