Spring Chinook window opens on the Columbia as May flows run clear

What's Biting

What's Next

The low-50s water temperature window is the sweet spot for Columbia River spring Chinook — fish are energetic enough to hold in defined current lanes yet not pushed into accelerated upstream migration. If air temperatures continue climbing through mid-May, watch for water temps to nudge into the upper 50s over the coming days. Once the river consistently reads above 54–56°F, Chinook tend to compress active feeding into early-morning and evening sessions as midday warmth drives fish deeper. Anglers planning weekend trips should prioritize first light and the two hours before dusk; mid-morning launches will yield shorter productive windows.

Presentation-wise, moderate flows at the measured gauge favor back-trolled plugs and spinner rigs worked along current seams, as well as drift-fished bait in tailouts where Chinook stack between upstream pushes. High, off-color water is not a factor here, so there is no need to scale up leaders or line weight for visibility — go finesse where regulations allow.

For bass anglers on the Columbia, the post-spawn transition is squarely underway in this temperature range. Tactical Bassin's early-May coverage notes that bass in this transitional phase stage on the nearest structural edges off spawning flats — ledges, submerged timber, gravel points, and current breaks — and that schooling behavior during this period creates back-to-back catch opportunities once fish are located. Drop-shots, swimbaits skipped under overhanging cover, and finesse jigs are the confidence plays through early June before fish slide toward deeper summer haunts.

On Puget Sound's freshwater tributary systems, resident rainbow and coastal cutthroat are entering late-spring mode. These smaller drainages warm faster than the mainstem Columbia, meaning fish are already beginning to favor riffle tails and shaded lies during midday hours. Early-morning nymph and dry fly presentations timed to the first two hours of light should outpace midday efforts; a soft-hackle or elk-hair caddis in size 14–16 is a reasonable starting point as caddis emergences ramp up across the Pacific Northwest through May.

The waning crescent moon this week means darker overnight periods and reduced nocturnal light — conditions historically associated with improved dawn feeding windows on salmon and trout, as fish active under darkness remain on the feed into first light. Plan launch times accordingly.

Context

Mid-May is historically a transitional peak for Washington's Columbia River spring Chinook fishery. The spring run — known locally as springers — typically begins showing in the lower Columbia in late March, with peak numbers moving through the mainstem during the second and third weeks of May in most years. The current timing is right on schedule by established benchmarks for this drainage.

Water temperatures in the low 50s at this date are consistent with historical mid-May norms for the Columbia, reflecting the balance of snowmelt contribution and spring solar gain that characterizes this shoulder season before summer warming takes over. Flows at 1,330 cfs at the measured gauge indicate conditions have not been disrupted by the extreme high-water events that can push Chinook off their lies and shut down presentation-based fishing — a common disruption in years with late, heavy snowpack releases.

For Puget Sound tributaries, mid-May sits at the tail end of the spring steelhead season in most systems. Summer-run steelhead historically don't begin showing in numbers until late June into July, leaving a gap in the steelhead calendar. Resident rainbow and coastal cutthroat remain available through summer in most drainages, though the quality window for dry fly and nymph fishing typically narrows after mid-June as water temperatures climb and flows drop.

No real-time comparative signal is available from the angler-intel feeds specifically for Washington river systems during this reporting cycle. WA WDFW Fishing Reports is the primary state angler-survey resource, but the extracted content describes program operations rather than current-cycle catch data. Anglers should check the WA WDFW Fishing Reports page directly for up-to-date creel surveys, stocking updates, and any emergency closures before planning a trip.