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177-acre Twotree Island Channel fishing map with NOAA BlueTopo survey contours (99.62% measured, 100% assessed), source-traceable coastal structure, regional fish-survey occurrence, sourced forage timing and verified public access. The water tops out around 85 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.
The drawn water covers 177 acres wrapped in 2.8 miles of bank. With a 1.5 development index there's bank structure worth casting at, in moderation. 0% of the surface is littoral (under ~15 ft) — cover, weeds and forage water. Call it 1 mi long by 0.4 mi wide at the broadest reach. If the bite dies, Niantic Bay is 3 mi to the northwest.
The spring pattern is a shallow one: striped bass in 5 to 20 ft. As the season builds they drop to 25 to 60 ft, wintering in 20 to 50 ft. Top water on the chart: Surveyed channel edge, a drop-off in the 59 ft range, prime in summer. Time it for early morning and the evening. Summer baits: a flutter spoon (deep) or an umbrella rig (trolled) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dawn & dusk | open water | Bucktail jig + trailer, Walking topwater (dawn) |
| Summer | 25 to 60 ft | dawn & dusk | Surveyed channel edge (59 ft) | Flutter spoon (deep), Umbrella rig (trolled) |
| Fall | 10 to 35 ft | dawn & dusk | open water | Topwater walker, Jerkbait |
| Winter | 20 to 50 ft | midday | Surveyed channel edge (49 ft) | Alabama rig (slow), Flutter spoon |
Spring bluefish on Twotree Island Channel hold shallow, usually 3 to 20 ft. By summer they slide out to 5 to 30 ft, and by winter most fish are in 15 to 40 ft. The chart's best answer is USGS-mapped Twotree Island sand-wave field — gravel shoal, 77 ft, good for summer. Prime time lands in early morning and the evening. The summer box starts with a popper (early/late) or a metal jigs in the rips.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 20 ft | dawn & dusk | open water | Metal (Hopkins/Kastmaster), Pencil popper |
| Summer | 5 to 30 ft | dawn & dusk | USGS-mapped Twotree Island sand-wave field (77 ft) | Popper (early/late), Metal jigs in the rips |
| Fall | 3 to 25 ft | dawn & midday | USGS-mapped Twotree Island sand-wave field (77 ft) | Pencil popper, Big metal |
| Winter | 15 to 40 ft | midday | open water | Metal jig worked slow (southern waters) |
In spring, summer flounder (fluke) run shallow here, mostly 5 to 25 ft. Summer pushes them deeper, 8 to 35 ft, and winter fish settle into 20 to 60 ft. Surveyed channel edge is the standout, a drop-off at roughly 49 ft, rated prime for fall summer flounder (fluke). Time it for midday and early morning. You won't need more than a bucktail (1-3 oz by drift speed) or a gulp grub on jighead most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | midday & dawn | Surveyed channel edge (63 ft) | Bucktail + Gulp swimming mullet, Hi-lo rig + squid strip |
| Summer | 8 to 35 ft | midday & dawn | Surveyed channel edge (63 ft) | Bucktail (1-3 oz by drift speed), Gulp grub on jighead |
| Fall | 12 to 45 ft | midday | Surveyed channel edge (49 ft) | Heavier bucktail on the lumps, Big Gulp 6" grub |
| Winter | 20 to 60 ft | midday | Surveyed channel edge (59 ft) | Slow bottom rig + strip |
The spring pattern is a shallow one: black sea bass in 10 to 40 ft. As the season builds they drop to 15 to 60 ft, wintering in 26 to 85 ft. Top water on the chart: Surveyed channel edge, a drop-off in the 59 ft range, prime in summer. Time it for midday and early morning. Summer baits: a bucktail + grub or a diamond jig + squid teaser gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 10 to 40 ft | midday & dawn | Surveyed channel edge (49 ft) | Hi-lo rig + squid, 1-2 oz bucktail + Gulp |
| Summer | 15 to 60 ft | midday & dawn | Surveyed channel edge (59 ft) | Bucktail + grub, Diamond jig + squid teaser |
| Fall | 20 to 80 ft | midday | Surveyed channel edge (63 ft) | 3-4 oz vertical jig (deep), Double-teaser rig |
| Winter | 26 to 85 ft | midday | open water | Heavy hi-lo rig on deep wrecks |
Come spring, look for tautog (blackfish) tight to the bank in 5 to 25 ft. They move out to 10 to 35 ft in summer and finish the year down in 30 to 70 ft. If you only fish one area, make it Surveyed channel edge: a drop-off around 49 ft that scores prime in fall. Best bite is early morning. A 1/2-1 oz tog jig + crab is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | midday & dawn | open water | Tog jig + green crab half, Bare jig + clam (early) |
| Summer | 10 to 35 ft | dawn | open water | 1/2-1 oz tog jig + crab |
| Fall | 10 to 50 ft | midday | Surveyed channel edge (49 ft) | Tog jig + whole green crab, Old-school rig + double crab (deep) |
| Winter | 30 to 70 ft | midday | open water | Heavy jig + crab on deep structure |
4 pieces of structure are mapped here — USGS-mapped Twotree Island sand-wave field, around 77 ft, is the deepest of them.
Access data: Connecticut DEEP — State Boat Launches. 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 Twotree Island Channel specifically, so confirm the current rules before you fish.
Check the official Connecticut fishing regulations →
Twotree Island Channel is about 85 ft (26 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 Twotree Island Channel.
Surveyed channel edge is the top-rated area: a drop-off in about 59 ft of water that rates prime for striped bass in summer. Every other rated spot, per species and season, is on the map above.
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 Twotree Island Channel 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.
Niantic Bay 3 mi · Dodge Pond 4 mi · New London Harbor 4 mi · Gorton Pond 5 mi · Thames River 7 mi · Pataganset Lake 7 mi · Powers Lake 9 mi · Fishers Island Sound 9 mi · Rogers Lake 9 mi · Mystic Harbor 9 mi · Norwich Pond 10 mi · Uncas Lake 10 mi
See how Twotree Island Channel 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; 100% measured, 0% 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.