Spring Chinook Prime on Oregon's Coast; Swell Shapes Offshore Access

What's Biting

What's Next

Swell heights ranging from 5.2 ft at the Columbia River Bar (buoy 46029) to 7.5 ft farther offshore (buoy 46002) — combined with 9 m/s winds at buoy 46050 — will keep bar crossings a genuine decision point over the next 48–72 hours. For boats that can make the run, conditions may improve in shorter windows between swell sets; watch buoy 46050 for any easing below 4–5 ft as your go/no-go benchmark for nearshore and offshore grounds.

For spring Chinook, the second week of May is a pivotal window. Saltwater Sportsman's coverage of the Buoy 10 fishery at the Columbia River mouth highlights how quickly the ocean-staging phase can shift — fish building up off the bar can transition into active upstream mode fast once river conditions call them in. Typical ocean Chinook technique in 56–57°F water involves trolling cut herring or anchovies at 20–40 feet, with the strongest bite typically occurring on incoming tide during first and last light. The closer you can fish to active current seams near river mouth structure, the better.

Nearshore rockfish — particularly black rockfish along jetty structure and reef outcroppings — offer a consistent alternative when offshore swell shuts down the bigger runs. These fish feed aggressively in May's water temps, and anglers working protected inshore zones or fishing from jetties can find solid action while offshore windows are narrow. Pacific halibut are also in play for vessels that can reach the shelf; verify current season dates and daily limits under Oregon state regulations before targeting them.

The waning crescent moon phase keeps tidal amplitude moderate this week, which tends to stabilize bait in predictable current lanes. Plan arrivals to coincide with the first major tidal push of the morning — that's historically when Chinook and feeding rockfish are most active along the Oregon coast.

Context

Water temperatures of 56–57°F in the second week of May are on pace with typical Oregon Coast spring patterns. The North Pacific sheds its winter cold through April into early May, with nearshore temps climbing from the low 50s in late winter to the upper 50s by mid-spring. What follows is worth noting: summer upwelling — cold, nutrient-rich deep water drawn toward the surface by prevailing northwest winds — can push nearshore temps back down into the low 50s through June and July. That upwelling cycle is a double-edged sword: it fuels the forage productivity that drives the whole food chain, but it can temporarily suppress the bite on warmer-water species while keeping cold-water targets like Chinook, rockfish, and halibut active longer than comparable coastal fisheries elsewhere.

The spring Chinook run at the Columbia River mouth is one of the Pacific Northwest's signature fishing events. Saltwater Sportsman has covered the Buoy 10 fishery near Astoria and Warrenton as a marquee seasonal gathering — historically drawing large fleets of river sleds and charter boats as fish stage before entering the river. May typically represents the peak of the spring run, with numbers tapering as the summer Chinook transition approaches in late May and June.

No direct comparative data from charter captains or local tackle shops was available in this reporting cycle to benchmark this year's run against prior seasons. Western Outdoor News — Saltwater noted significantly improved salmon conditions off Half Moon Bay in California as water temperatures cooled from 58°F to 54°F — a pattern that suggests the Pacific Northwest's consistently cooler coastal readings may be keeping salmon in a favorable feeding mode. If that dynamic holds northward, Oregon's 56–57°F surface temps could sustain productive ocean Chinook fishing into the third week of May before the summer transition takes hold.