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89-acre Byram Harbor fishing map with 92.92%-measured NOAA BlueTopo contours, nine measured rock, groin, pier and depth-transition spots, five Long Island Sound fish profiles, three forage calendars, resident-permit connected launch access and current Connecticut rules. The water tops out around 11 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's the year, species by species, as the scoring engine sees it.
Byram Harbor maps at 89 acres behind 3.2 miles of shoreline, broken up by an island. An index of 2.4 puts the bank firmly in maze territory: point after pocket after cove, every one a casting target. Every acre of it sits shallower than ~15 ft: one big littoral zone, cover and forage throughout. End to end it runs roughly 0.8 mi, about 0.6 mi across. Captain Harbor sits 1 mi east — the closest neighbouring chart.
Start shallow in spring: striped bass sit in 3 to 11 ft that time of year. They don't go far with the seasons — 3 to 11 ft covers summer, 3 to 11 ft covers winter. The spot to know is Surveyed channel edge, a drop-off in about 5 ft of water that rates good for striped bass in summer. Warm-month bites cluster around early morning and the evening. Throw a topwater walker at low light or a paddletail on a light jig until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 11 ft | dawn & dusk | Surveyed channel edge (5 ft) | 3-6 inch paddletail, Suspending minnow plug |
| Summer | 3 to 11 ft | dawn & dusk | Surveyed channel edge (5 ft) | Topwater walker at low light, Paddletail on a light jig |
| Fall | 3 to 11 ft | dawn & dusk | Surveyed channel edge (5 ft) | Pencil popper, Baitfish swimbait |
| Winter | 3 to 11 ft | midday | Surveyed channel edge (5 ft) | Slow paddletail, Bucktail near bottom |
Early season bluefish use the shallows, holding in 2 to 11 ft. Even in summer they hold at 2 to 11 ft; winter keeps them in 3 to 11 ft. Put NOAA charted groin first on the milk run — a jetty / riprap near 4 ft that grades prime for summer. In summer the feeding windows fall in 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 | 2 to 11 ft | dawn & dusk | Surveyed channel edge (5 ft) | Metal (Hopkins/Kastmaster), Pencil popper |
| Summer | 2 to 11 ft | dawn & dusk | NOAA charted groin (4 ft) | Popper (early/late), Metal jigs in the rips |
| Fall | 1 to 11 ft | dawn & midday | Surveyed channel edge (5 ft) | Pencil popper, Big metal |
| Winter | 3 to 11 ft | midday | open water | Metal jig worked slow (southern waters) |
Spring puts summer flounder (fluke) in skinny water — 2 to 11 ft is the zone. Summer fish stay in 3 to 11 ft, and winter fish hold in 3 to 11 ft. Summer summer flounder (fluke) concentrate at Surveyed channel edge, a prime-rated drop-off around 5 ft. Warm-month bites cluster around midday and early morning. 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 | 2 to 11 ft | midday & dawn | Surveyed channel edge (5 ft) | Bucktail + Gulp swimming mullet, Hi-lo rig + squid strip |
| Summer | 3 to 11 ft | midday & dawn | Surveyed channel edge (5 ft) | Bucktail (1-3 oz by drift speed), Gulp grub on jighead |
| Fall | 3 to 11 ft | midday | Surveyed channel edge (5 ft) | Heavier bucktail on the lumps, Big Gulp 6" grub |
| Winter | 3 to 11 ft | midday | Surveyed channel edge (5 ft) | Slow bottom rig + strip |
Start shallow in spring: black sea bass sit in 3 to 11 ft that time of year. They don't go far with the seasons — 3 to 11 ft covers summer, 3 to 11 ft covers winter. The spot to know is NOAA charted underwater rock, a rock pile in about 8 ft of water that rates prime for black sea bass in spring. Warm-month bites cluster around midday and early morning. 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 | 3 to 11 ft | midday & dawn | NOAA charted underwater rock (8 ft) | Hi-lo rig + squid, 1-2 oz bucktail + Gulp |
| Summer | 3 to 11 ft | midday & dawn | NOAA charted underwater rock (8 ft) | Bucktail + grub, Diamond jig + squid teaser |
| Fall | 3 to 11 ft | midday | NOAA charted underwater rock (8 ft) | 3-4 oz vertical jig (deep), Double-teaser rig |
| Winter | 3 to 11 ft | midday | NOAA charted underwater rock (8 ft) | Heavy hi-lo rig on deep wrecks |
When the water first warms, tautog (blackfish) slide up into 2 to 11 ft. There's no big seasonal slide here — summer means 3 to 11 ft, winter 3 to 11 ft. Start at NOAA charted underwater rock. It's a rock pile holding about 8 ft of water and rates prime come spring. The feeding windows run 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 | 2 to 11 ft | midday & dawn | NOAA charted underwater rock (8 ft) | Tog jig + green crab half, Bare jig + clam (early) |
| Summer | 3 to 11 ft | dawn | NOAA charted underwater rock (8 ft) | 1/2-1 oz tog jig + crab |
| Fall | 2 to 11 ft | midday | NOAA charted underwater rock (8 ft) | Tog jig + whole green crab, Old-school rig + double crab (deep) |
| Winter | 3 to 11 ft | midday | NOAA charted underwater rock (8 ft) | Heavy jig + crab on deep structure |
Structure-wise the chart holds 9 features, led in depth by NOAA charted underwater rock at roughly 8 ft.
Access data: Town of Greenwich — Byram Marina and 2026 Marina Policies. Confirm conditions and fees locally before you launch.
Season dates, license requirements, and size and bag limits for Connecticut waters are set by the Connecticut DEEP (marine fishing) — and special regulations can apply to Byram Harbor specifically, so confirm the current rules before you fish.
Check the official Connecticut fishing regulations →
Byram Harbor is about 11 ft (3 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 Byram Harbor.
NOAA charted underwater rock is the top-rated area: a rock pile in about 8 ft of water that rates prime for black sea bass in spring. 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 Byram Harbor is regulated by the Connecticut DEEP (marine fishing). Check the official Connecticut regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Captain Harbor 1 mi · Indian Harbor 2 mi · Port Chester Harbor 2 mi, NY · Greenwich Cove 3 mi · Stamford Harbor 5 mi · Mamaroneck Harbor 6 mi, NY · Larchmont Harbor 8 mi, NY · Kensico Reservoir 8 mi, NY · Echo Bay 9 mi, NY · Lloyd Harbor 11 mi, NY · Hempstead Harbor 12 mi, NY · Sheffield Island Harbor 12 mi
See how Byram Harbor stacks up: best striped bass lakes in Connecticut · best summer flounder (fluke) lakes in Connecticut · best bluefish lakes in Connecticut · best black sea bass lakes in Connecticut
Browse all Connecticut fishing maps or see every water on DepthScout. Bathymetry credit: NOAA BlueTopo (NAVD88; 93% measured, 6% 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.