Post-blow window opens the Washington Canyon wall — yellowfin stack the warm seam

Last week beat us up a little before it paid us back. We had a stiff blow roll through over the weekend that put a 3-4 foot chop on the canyon and kept most of the fleet tied to the dock Sunday into Monday. That kind of wind mixes the top of the water column, and I was bracing for the usual hangover — cloudy green water, scattered bait, a slow week of hunting. Instead the blow did us a favor. It pushed the shelf-slope thermal break wide open, and by Tuesday afternoon we were reading a 10.3-degree differential between the shelf water and the slope water off the canyon edge — the widest gradient I've seen all year. That's not a subtle seam. That's a wall of warm water stacked against cold, and anything with a swim bladder knows exactly where that line is.

The moon's been waning down toward new — dark nights right now, and dark nights on the canyon mean squid. The Illex and shortfin have been thick on the meter after sundown, and with no moon washing out the water column, the squid-light bite off the stern has been about as reliable as anything we've got right now. New moon lands mid-week ahead, which means springs building, more current push through the canyon, and — if the warm seam holds — a shot at getting bigeye to show on the night drop. That's the setup. Wednesday and Thursday were the payoff.

We worked the warm seam running from the Wilmington-Poor Man's stretch down across the top of Washington, riding the 100-fathom curve where it bends around 38°10'N, 74°12'W. That's been the honest edge line — troll it east to west on the drop from 90 fathoms out to about 130, and you're crossing the thermal break instead of running parallel to it, which matters. Yellowfin were sitting right on that edge, mixed classes, mostly 30-50 pounders with a few bigger fish mixed through, and they wanted a green machine or a small Ilander pulled tight in the shotgun position, ballyhoo strings out further back. Nothing exotic — small spreader bars worked when the fish were finicky, straight ballyhoo-and-hookless-teaser combos worked when they were fired up chasing bait balls we could actually see on the surface.

The bluefin have been a different story and honestly the more interesting one right now. NE upwelling has sharpened up the 20 to 30 fathom breaks well inshore of the canyon proper, and the corridor running north of the Coimbra wreck has been holding a real concentration of school-class bluefin — 20 fathoms of water, tighter troll spread, cedar plugs and small Mojos doing the damage on the troll pass, and then at night the squid lights bring them up shallow enough to jig cut squid strips right off the transom. That's been more consistent than the offshore bite, honestly — three trips out to that corridor this week, connected on all three, though not every fish stuck and we had our share of pulled hooks on light drags set for the smaller class fish.

Wahoo have been quiet for us — one fish, a decent 45-pounder, came off a high-speed Yo-Zuri along the east wall drop where the current rips hardest, but that's one bite in four trips, not a pattern yet. Mahi have shown in ones and twos around any floating debris or weed line we crossed on the run out, nothing to build a day around but worth a stop if you see color under a paddy. And I'll say this plainly — the bite has not been a gimme. We had one trip this week where we worked the whole edge from Poor Man's down to Washington and only had two bites all day. The fish are there, but they're locked onto that thermal seam with real precision, and if you're not running your temp gauge and paying attention to where that line actually sits that day, you can burn a tank of fuel trolling warm water on both sides of the fish.

White marlin is the one I'm watching hardest right now. The warm plume that's been feeding this thermal setup is the same signal that usually pushes the first flags up onto the bank, and with the canyon complex running this warm this early, I'd put the window at seven to ten days out — call it the back half of next week. If I had one day to burn on that bet, I'd run the ballyhoo spread light and small, dinks and split-tail mullet on 20-pound class gear, working the 50-fathom edge inshore of the canyon head where the bait's been stacking.

Here's the honest read heading into this week: the Wednesday-Thursday window was the best structural setup we've had all season, and if that thermal break holds through the weekend — big if, since another front is lurking behind this one — I'd keep running that same seam off Wilmington-Poor Man's into Washington. If the gradient collapses back down, I'm sliding inshore to the Coimbra corridor and fishing bluefin in 20 fathoms with the squid lights after dark, because that pattern doesn't need the canyon to be perfect to produce. Either way, work the dark nights while you've got them — the new moon squid bite has been the most dependable thing on my boat all week.