When bluefin are around Cape Cod Bay harbors
Atlantic bluefin tuna fishing out of Barnstable and Cape Cod Bay harbors runs mostly from boats based at Rock Harbor in Orleans, with Sesuit and Barnstable on the same bay. The season is long, and one stretch of it matters most for owners who also fish bass. General behavior and tackle are covered in our Atlantic bluefin tuna fishing guide.
| Window | Source | Species named |
|---|---|---|
| May through early October | Orleans Chamber of Commerce guide | Striped bass, bluefish, bluefin |
| Late summer through fall | Liberty | Tuna and striped bass combo |
May through early October
The Orleans Chamber of Commerce guide lists Rock Harbor boats targeting striped bass, bluefish and bluefin from May through early October. That is the outer window, and the guide does not name a peak.
The late summer and fall combo window
Liberty’s tuna and bass combo runs late summer through fall, the stretch when one boat can work bass and bluefin on the same trip.
Where boats run from Rock Harbor
Rock Harbor boats run offshore at first light for the early bite and fish the bay later. For the wider picture, see the Northeast regional picture (see also the Atlantic Northeast region guide).
- Stellwagen Bank: offshore, named by Liberty as an early-bite destination.
- The Backside: the other early-bite destination Liberty names.
- Canyons: not run from this port.
Stellwagen Bank and the Backside
Liberty names both as the grounds Rock Harbor boats run to for the early tuna bite.
Why boats leave early
Liberty says an early departure is needed to reach Stellwagen Bank or the Backside for the early tuna bite.
Canyon trips are a Hyannis thing
Helen H tuna trips are canyon trips from Hyannis, not from this port. Keep that in mind when comparing ports.
Grounds and structure that hold bluefin
The bay has a sharp depth contrast over a short stretch of water. The table lays it out.
| Ground | Depth (ft) | Note |
|---|---|---|
| Billingsgate Shoal | 15 | Shoal top rarely deeper than 15 ft |
| The Square | 90 | Old-timers’ name for the deeper water west of Billingsgate |
| Off Sesuit Harbor | 80 | Open-water school area out into Cape Cod Bay |
| Brewster and Dennis reef | n/a | Proposed, not confirmed built |
| Stellwagen Bank | n/a | Offshore |
Billingsgate’s 15 ft top and the 90 ft water to its west show clearly on Chart Contours. Chart layers are not for navigation.
Billingsgate Shoal, 15 ft
The shoal top is rarely deeper than 15 ft.
The Square, 90 ft
The deeper water west of Billingsgate Shoal is about 90 ft, which old-timers call "The Square." That is 75 ft more water than the shoal top, within the same piece of bay.
Open water off Sesuit, 80 ft
This school area sits in about 80 ft, out into Cape Cod Bay from Sesuit Harbor.
The proposed Brewster and Dennis reef
The Brewster and Dennis artificial reef is proposed and not confirmed built.
How it is fished and who fishes it
Local outfits describe three approaches: giants, combo days, and a rod kept ready on the shoal.
Giants inshore and offshore
Hindsight works giant bluefin both inshore and offshore.
Tuna and bass combos
Liberty runs tuna and bass combo trips, late summer through fall. Anglers who fish stripers now and want to move up to bluefin can use this format as the step between the two.
A spinning rod ready on the shoal
The Billingsgate writer advises keeping spinning tackle ready for tuna while fishing the shoal. That means bass fishing the 15 ft top with the tuna rod already rigged.
Local charters
Five outfits list Atlantic bluefin tuna out of this port group:
- Liberty Fishing Charters: the 46-foot Hatteras sportfisher Liberty.
- Hindsight Sportfishing: Hindsight, Capt. Brett Wilson and crew.
- Rock Harbor Charter Service: a fleet that includes Columbia (Capt. Marc Costa) and Stunmai II.
- Laura-Jay Sportfishing: a custom 31-foot Duffy Sportfisherman, Captain Don Cianciolo.
- Dragonfly Sportfishing: Captain Mike Bosley.
Our other tuna fishing guides cover more ports.
FAQ about bluefin tuna out of Barnstable and Cape Cod Bay harbors
When are bluefin around Rock Harbor?
May through early October, per the Orleans Chamber of Commerce guide. The combo window runs late summer through fall.
How deep is the water near Billingsgate Shoal?
The shoal top is rarely deeper than 15 ft. The Square, to its west, is about 90 ft.
Do Rock Harbor boats run to the canyons?
No. They run to Stellwagen Bank and the Backside. Helen H canyon trips leave from Hyannis.
Is the Brewster and Dennis reef built?
It is proposed and not confirmed built.
Can I fish striped bass and bluefin the same day?
Yes. Liberty runs tuna and bass combos late summer through fall, and the Billingsgate writer keeps spinning tackle ready on the shoal.
Which charters target bluefin here?
Liberty, Hindsight, the Rock Harbor Charter Service fleet, Laura-Jay and Dragonfly.
