Mackerel Stack the Edge, Bluefin Follow — Stellwagen Turns On While Cod Stay Steady on the Gravel

We're sliding into new moon this week — full dark by the 13th — and that means building spring tides across the Bank starting now and stacking through the weekend. Last week's wind had some north in it, enough to push a modest upwelling pulse across the 20 to 30 fathom breaks, and that cooler, nutrient-rich water did what it always does out here: it concentrated bait. Mackerel schools that had been spread thin over the Basin balled up tight along the Stellwagen Edge and around Tillies Bank, and where the mackerel go, the bluefin follow. I had two days last week where the surface just erupted — greenbacks getting pushed up against the drop-off, gulls working hard overhead, and dark shapes cutting through underneath. That's the pattern right now, and it's a good one.

With the new moon building the tide, current over the gravel patches on the Edge and around Tillies is going to run harder than it has in a couple weeks. That's not bad news for cod — a stronger sweep pushes more food past the structure and gets them feeding in shorter, more predictable windows around the tide change. But it does mean timing matters more than usual. Fish the last hour of the ebb and the first hour of the flood, and don't waste bait trying to hold bottom in the guts of a hard spring tide — you'll just get swept off the structure.

Cod fishing has been steady, not spectacular, on the classic gravel — the northern edge of Stellwagen and the rock piles off Tillies Bank, 90 to 130 feet. Clams on a standard cod rig are still doing the job, but jigging has outproduced bait on calmer days — 10 to 14 ounce diamond jigs and the heavier Norwegian-style jigs worked with a slow lift-drop right off bottom. Fish are running mostly mid-size, 8 to 15 pounds, with the occasional double-digit fish mixed in when you hit a pod tight to a boulder edge. Nothing to write home about in terms of numbers, but consistent enough that a good crew working the tide change is putting fish in the box most trips.

Haddock have been the more dependable player over the mud in the Stellwagen Basin, 160 to 200 feet. Standard haddock rigs with clam or squid strips are producing decent numbers on the slower parts of the tide — this is a fish that doesn't fight the current the way cod like structure does, so the basin bite hasn't been as tide-dependent. Average fish 18 to 22 inches, mixed in with enough shorts that you're sorting through some to fill a limit, but the box has been filling steadier here than on the gravel most days this month.

Pollock have shown up sporadically around wreck structure and the steeper drop edges — good news for anyone jigging bucktails or soft plastics in the mid-water column, 40 to 80 feet down over 100-plus feet of water. When you find them stacked, it's fast action, but they've been moving, not holding, so it takes some searching some days.

The real story this week is the bluefin. With the mackerel pushed up tight against the Edge and around Tillies, the tuna have been working shallower than they were a couple weeks back — some fish showing right up on top in 30 to 50 feet of water over the Bank itself, not just out toward Carter Canyon. Live-lining mackerel on wire or heavy fluoro leader has been the most consistent approach when you can find a workable pod — hook one up on a 6/0 circle, let it swim naturally under the commotion, and be ready. Jigging green machines and Shimano Flat-Fall style jigs through the bait balls has also connected, especially in the early morning when the surface activity is thickest before boat traffic scatters things. Sizes have been mixed — some schoolies in the 60 to 100 pound range mixed with a few genuine giants pushing 300-plus that showed up on the Edge chasing the thicker pods. Nothing guaranteed here — the bait moves, the fish move with it, and what's holding tight to the Edge one morning can be scattered by afternoon boat pressure. But the setup right now, with mackerel concentrated by that upwelling pulse, is about as good a starting point as you'll get this time of year.

Hake fishing at night has been quietly solid for anyone willing to run out and anchor up after dark over deeper water off the Basin — nothing flashy, but a good bucket of hake on cut bait for anyone working the late shift.

Looking ahead: if this new moon spring tide holds the pattern, I'd expect the mackerel to stay concentrated through the weekend and into early next week, which should keep the bluefin interested on the Edge and around Tillies. The bigger unknown is whether the second warming surge working through Georges Bank starts to influence water quality on our side of the approaches — if that Veatch/Hydrographer differential keeps building the way it's been reported, we could see improved conditions pushing toward the canyon approaches off Cape Cod Tails later this month, which would be worth watching for anyone running the extra distance. For this week, though, I'd play it close to home — work the tide changes on the gravel for cod, hit the Basin mud for haddock in the slower water, and keep half an eye on the horizon for bird activity over the mackerel schools. That's where the tuna story is being written right now.