Catfish and Gar in Season as Mississippi and Atchafalaya Warm Toward June

What's Biting

What's Next

The Memorial Day holiday weekend will concentrate boat traffic at major launch ramps across the lower Mississippi and Atchafalaya Basin. Anglers who can launch before dawn or hold off until midweek will avoid the worst of the pressure. The First Quarter moon on May 24 is building toward Full, a period many catfish specialists on big-river systems associate with more aggressive nighttime feeding runs. Staging near deep holes and channel edges after dark with cut bait or live shad should outperform midday drifts through the holiday weekend.

Water temperature at 74°F is approaching the 76-80°F band that typically unlocks peak summer catfishing on both rivers. If warm and sunny conditions hold through the long weekend, that threshold should arrive by early June. Blue catfish become increasingly nomadic as temps push toward 78°F, staging on deep current seams by day and moving to tributary mouths and flats to feed at night. Flathead catfish follow a similar pattern but favor the inside bends of cutbanks and submerged logjams over open current.

Alligator gar activity in the Atchafalaya Basin oxbows should hold strong over the next few weeks. With water above 72°F, these fish roll in the shallows and push into backwater flats to feed on shad and rough fish. First light on calm mornings offers the best sight-fishing conditions before surface chop limits visibility. Targeting slack-water cuts and submerged grass edges adjacent to the main channel is the most reliable approach at this flow level, a pattern consistent with what Hatch Magazine describes in its recent look at gar on Southern big-river systems.

Largemouth bass in the Basin have largely finished spawning and are beginning their post-spawn pattern shift. Fish that were on shallow flats will be retreating to the first available cover: flooded cypress knees, submerged timber, and grass edges in the 4-8 foot range. Evening topwater along wood cover and the final hour before dark should be productive as water cools from the afternoon peak. Jigs and slow-rolled swimbaits near bottom structure will pick up fish through the midday lull.

Crappie (sac-a-lait) are typically in a post-spawn holding pattern by late May, suspended over brush piles and channel edges rather than on the shallow flats where they were staging a month ago. Deeper presentations in the 10-15 foot range will outperform anything worked near the surface until water cools again in fall.

Context

For the Mississippi and Atchafalaya drainages, late May marks the pivot between spring runoff and Louisiana's long summer. Most freshwater species complete the spawn by mid-May at this latitude: largemouth bass and crappie have been off beds for two to four weeks by Memorial Day, while channel catfish enter their own spawn window as water climbs toward the mid-70s. The transition sets up one of the more productive catfishing stretches of the year before summer heat pushes water temperatures well past 80°F and feeding windows compress to low-light periods.

A flow of 424,000 cfs at Baton Rouge sits in the moderate-to-elevated range for late May, consistent with the tail end of the spring pulse rather than an active flood event. High-water years on the Atchafalaya historically push fish into flooded timber and seasonally inundated marshes, creating expansive habitat for bass and crappie but requiring local knowledge to locate productive edges effectively. At the current level, secondary channels and oxbow inlets in the Basin should be holding good concentrations of forage and the fish that follow it.

Water temperature at 74°F is a couple of degrees below the 76-78°F more typical at Baton Rouge in the final week of May. That modest gap is not unfavorable: catfish, gar, and bass all feed more actively in the low-to-mid 70s than in the low 80s that arrive by July. If the cooler reading reflects a slower spring warm-up overall, the productive late-spring window may extend a week or two past its usual close, giving anglers extra time on quality pre-summer conditions.

No direct year-over-year testimony from local captains or tackle shops was available in this week's feeds, so the above reflects established seasonal patterns for the drainage rather than a specific 2026-versus-prior-years comparison.