Cortes Bank

Climate Setup

ENSO-neutral with an El Niño Watch active — NOAA gives 82% odds of formation by July. Marine heatwave NEP25A is on the books across the Northeast Pacific. Local water is running 4.2°F above seasonal norm, putting the thermal calendar 4-6 weeks ahead of typical timing. Neutral years are best read against their own conditions stack rather than mapped onto a single historical analog. We surface the regime so you can read today's conditions through it — what worked then, what's shifted since, what to watch.

Conditions & Overview

Water temperature at the bank is running 61 degrees according to buoy readings, which is cooler than the mid-60s typically associated with strong tuna action at this offshore seamount but still within range for resident species. Clarity in the water column is exceptional given the shallow structure, but this makes bluefin and yellowtail notoriously finicky about line and hook presentation. Northwest wind is blowing steady at 16 mph with seas running just under six feet, manageable for the run but choppy enough to slow the surface bite during mid-afternoon. Barometric pressure sits at 1017.6 millibars and has held nearly flat over the past six hours, offering stable conditions without the aggressive pre-frontal feeding trigger that often fires offshore pelagics. Tides are swinging hard today with a 5.4-foot range between the morning low and tonight's high, which will drive current across the bank's shallow pinnacles and stack baitfish along depth transitions.

Best Windows (Next 48 Hours)

Your best opportunity is Wednesday morning from first light at 4:49 AM through 9:00 AM, anchored over the eastern structure in 60 to 80 feet. This window captures the negative low tide at 6:41 AM when current accelerates across the bank's rocky plain, concentrating anchovies and small rockfish along the bottom contour where yellowtail and bluefin hold. The incoming push that follows will sweep bait upward into the water column, triggering aggressive strikes on fly-lined sardines and light iron through mid-morning before wind builds Wednesday evening to 20 mph. Secondary windows include this evening from 6:00 PM through dusk as the incoming tide peaks at 10:47 PM, and again Thursday morning during the 7:22 AM low, though clearing skies Thursday will increase water clarity further and demand even lighter tackle.

What's Biting

Bluefin tuna in the 40 to 80-pound grade are holding over structure and feeding selectively on anchovies and small baitfish pressed tight to the bottom by current. Fish are line-shy in the crystal-clear water column, requiring 15 to 25-pound fluorocarbon leaders and size 1 to 2 hooks to draw strikes. Yellowtail in the 20 to 40-pound class are scattered across both the shallow kelp zones in 40 feet and the deeper rocky plains northeast of the main high spot, with larger forktails preferring the 70 to 80-foot zone where they can ambush bait pushed by tidal flow. These fish are aggressive but will immediately head for bottom structure on the hookup, demanding heavy drag pressure and quick response.

Yellowfin tuna are appearing in smaller numbers mixed with the bluefin schools, typically running 20 to 60 pounds and less particular about tackle than their bluefin cousins. Bonito are thick in the mid-water column, providing consistent action on small jigs and fly-lined bait for anglers targeting volume. Rockfish, sheephead, and whitefish are stacked on the deeper structure in 80 to 120 feet and respond well to dropper-loop rigs with torpedo sinkers, offering reliable action when pelagic species go quiet during slack current or high sun. Dorado occasionally move through when warm water pushes onto the bank, though at 61 degrees the current temperature is below their preferred range.

Where to Fish

The eastern kelp beds sit in 40 to 50 feet over rocky bottom and hold large calico bass, white seabass at dawn, and cruising yellowtail that key on baitfish sheltering in the kelp canopy. Northwest wind creates downhill current through this zone during the outgoing tide, sweeping bait from shallow to deep and stacking predators along the kelp edge where they can intercept the flow. The 70 to 80-foot plain northeast of the main buoy offers the most consistent yellowtail action right now, as tidal acceleration across this flat rocky bottom concentrates schools of anchovies and small rockfish that draw feeding fish throughout the tide cycle. This zone fishes best with the boat anchored upcurrent and baits drifted back into the strike zone on minimal weight.

The high spot near the submerged pinnacle in 10 to 20 feet produces bluefin during low-light periods when fish move shallow to feed, but extreme clarity here demands the lightest possible terminal tackle and perfectly presented baits that swim naturally without drag or interference. Structure south and west of the main bank in 100 to 200 feet holds tuna that have pushed off the shallow zones during bright sun or heavy boat pressure, and these fish often respond better to vertical jigging with 200 to 300-gram knife jigs than live bait. The deeper drop-offs along the bank's southern edge in 200 to 300 feet are prime zones for yo-yo tactics when sonar marks show suspended fish that won't rise to the surface, with heavy iron or knife jigs cranked rapidly through the zone drawing reaction strikes.

The wreck near the main high spot sits in approximately 30 feet and serves as a major bait concentration point, drawing both pelagic predators and resident rockfish that stage around the structure waiting for current to deliver food. This spot fishes well on the incoming tide as water pushes across the wreck and creates an eddy on the downcurrent side where yellowtail and bluefin ambush disoriented baitfish. The kelp-covered structure west of the main buoy in 50 to 70 feet produces oversized calico bass, lingcod, and occasional yellowtail during morning hours, with fish holding tight to the kelp stalks and requiring precise presentations that drop baits vertically into the canopy without spooking line-shy targets.

Tactics & Gear

Fly-lining mid-sized sardines on 15 to 20-pound Hi-Seas fluorocarbon leaders with size 1 or 2 live bait hooks is the primary bluefin presentation, with baits nose-hooked or butt-hooked depending on current strength and allowed to swim freely without weight into the feeding zone. When fish refuse unweighted baits, add a 4 to 6-ounce rubber-core sinker 3 to 4 feet above the hook to reach deeper holding zones while maintaining a natural presentation. Light iron in blue and white or scrambled egg patterns, specifically Salas 6X and 7X models, produce yellowtail and bonito when cast to surface boils or yo-yoed vertically through mid-water marks on the sounder. Red Salas 6X has been particularly effective on larger mossback yellowtail holding near bottom structure.

For vertical presentations on deeper fish, 200 to 300-gram knife jigs in chrome or blue/silver patterns work the 100 to 200-foot zone effectively, dropped to depth and cranked rapidly back to the surface in a classic yo-yo retrieve that triggers reaction strikes from suspended tuna. Shimano Flat Fall jigs in 150 to 200 grams excel during low-light periods or when fish are particularly finicky, as the slow flutter descent keeps the lure in the strike zone longer and draws bites from fish that ignore faster-moving presentations. Dropper-loop rigs with 8-ounce torpedo sinkers and size 2/0 to 4/0 hooks on 40 to 60-pound mono are standard for rockfish, sheephead, and whitefish on deeper structure, with squid or cut mackerel the preferred baits. Check your local bait dock before launching as sardine and anchovy availability varies day to day; sardines are preferred when available, with anchovies a reliable fallback and live mackerel often jigged fresh just outside the harbor for use as larger baits on trophy-grade yellowtail.

Tides & Timing

The 6:41 AM negative low Wednesday morning accelerates current across the bank's shallow structure during the prime early window, creating the strongest bait concentration and most aggressive feeding period of the 48-hour forecast. As tide transitions to incoming through mid-morning, expect fish to push higher in the water column and become more receptive to surface iron and unweighted fly-lined baits. This evening's 10:47 PM high tide peak will slow current dramatically through the 6:00 PM to dusk window, making this a finesse period that rewards patient anglers fishing lighter gear and allowing baits extended soak time to draw strikes from less aggressive fish. Thursday's 7:22 AM low comes later and will be less pronounced at minus 0.2 feet, shifting the optimal morning bite window approximately 90 minutes later than Wednesday but still offering strong current-driven action through 10:00 AM before sun angle and wind degrade the surface conditions.

Chlorophyll & Bait Edge

No current chlorophyll edge data is available for this offshore zone.