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Spawn timing & temperature guide

Flathead Catfish spawn timing guide.

Pylodictis olivarisWarmwaterCavity spawnerAgency-reported

The Flathead Catfish spawn cycle is driven by water temperature, not calendar date — fish initiate spawn behavior when water reaches 66°F regardless of when that happens in your region. Pre-spawn flatheads move from deep river channels and reservoirs to areas with cavity structure as water warms through 60s.

Flathead Catfish spawn temperature gauge

Spawn behavior is driven by water temperature, not calendar date. The same flathead catfish may spawn weeks earlier in southern range than northern — track water temp, not the date.

32°37°42°47°52°57°62°67°72°77°82°87°Peak 70–75°F
Pre-spawn — best fishingPeak spawn — conservationPost-spawn — recovery feeding·Dashed line = peak spawn boundaries

Flathead Catfish spawn cycle

Pre-Spawn
62–66°F
Trophy fishing
Spawn
66–78°F (peak 70–75°F)
Conservation window
Post-Spawn
78–86°F (~14 days)
Recovery feeding
Summer Pattern
Above 86°F
Standard summer patterns

Phase-by-phase breakdown

Pre-Spawn

Trophy fishing window
62–66°F

Pre-spawn flatheads move from deep river channels and reservoirs to areas with cavity structure as water warms through 60s.

Live bait fishing in deeper water adjacent to cavity structure produces large pre-spawn flatheads.

Spawn

Conservation window
66–78°F (peak 70–75°F)

Active spawning behavior. Cavity spawners with male parental care. Spawning sites often re-used year after year.

Trophy flatheads (50+ lbs) take 15–25 years to grow. Conservation-minded anglers practice C&R for trophy fish year-round.

Conservation context

Trophy flatheads (50+ lbs) take 15–25 years to grow. Conservation-minded anglers practice C&R for trophy fish year-round.

Post-Spawn

Recovery feeding
78–86°F (~14 days)

Males guard nests; females depart after spawning. Flatheads return to deep haunts 2–3 weeks post-spawn.

Live bait at deep cavities produces year-round; post-spawn fishing is among the most productive of the year.

Summer Pattern

Standard patterns
Above 86°F

Fish disperse to summer habitat and feeding patterns. Spawn cycle complete until following year.

Standard summer fishing tactics apply.

Regional spawn windows

Flathead Catfish spawn timing varies by region. Southern range fish initiate spawn first; northern fish later.

  • Mid-Atlantic / Appalachian WatershedsMid-June – Mid-July

    Susquehanna and Potomac rivers peak late June.

    JanJan — Outside spawn windowFebFeb — Outside spawn windowMarMar — Outside spawn windowAprApr — Outside spawn windowMayMay — Outside spawn windowJunJun — Outside spawn windowJulJul — Outside spawn windowAugAug — Outside spawn windowSepSep — Outside spawn windowOctOct — Outside spawn windowNovNov — Outside spawn windowDecDec — Outside spawn window
    Typical window: Mid-June – Mid-July
  • Southeast Rivers and ReservoirsMid-May – Mid-July

    Tennessee, Alabama, and Georgia rivers peak June.

    JanJan — Outside spawn windowFebFeb — Outside spawn windowMarMar — Outside spawn windowAprApr — Outside spawn windowMayMay — Outside spawn windowJunJun — Outside spawn windowJulJul — Outside spawn windowAugAug — Outside spawn windowSepSep — Outside spawn windowOctOct — Outside spawn windowNovNov — Outside spawn windowDecDec — Outside spawn window
    Typical window: Mid-May – Mid-July
  • Midwest Rivers and Natural LakesMid-June – Mid-July

    Mississippi, Missouri, and Ohio rivers peak late June.

    JanJan — Outside spawn windowFebFeb — Outside spawn windowMarMar — Outside spawn windowAprApr — Outside spawn windowMayMay — Outside spawn windowJunJun — Outside spawn windowJulJul — Outside spawn windowAugAug — Outside spawn windowSepSep — Outside spawn windowOctOct — Outside spawn windowNovNov — Outside spawn windowDecDec — Outside spawn window
    Typical window: Mid-June – Mid-July
  • Southern Plains / Ozark / Arkansas River SystemLate May – Late June

    Arkansas and Mississippi delta peak June.

    JanJan — Outside spawn windowFebFeb — Outside spawn windowMarMar — Outside spawn windowAprApr — Pre-spawn — water rising toward 66°FMayMay — Peak spawn (70–75°F)JunJun — Peak spawn (70–75°F)JulJul — Post-spawn — water at 78°F+AugAug — Outside spawn windowSepSep — Outside spawn windowOctOct — Outside spawn windowNovNov — Outside spawn windowDecDec — Outside spawn window
    Typical window: Late May – Late June
  • Texas River Systems and ReservoirsLate May – Late July

    Trinity, Brazos rivers peak June.

    JanJan — Outside spawn windowFebFeb — Outside spawn windowMarMar — Outside spawn windowAprApr — Pre-spawn — water rising toward 66°FMayMay — Peak spawn (70–75°F)JunJun — Peak spawn (70–75°F)JulJul — Peak spawn (70–75°F)AugAug — Post-spawn — water at 78°F+SepSep — Outside spawn windowOctOct — Outside spawn windowNovNov — Outside spawn windowDecDec — Outside spawn window
    Typical window: Late May – Late July

Spawn habitat

  • River cavity structure (undercut banks, log jams, rock crevices)
  • Deep holes adjacent to structure
Typical depth: 5–25 ft
Male vs. female behavior

Cavity spawners with male parental care. Spawning sites often re-used year after year.

Closed seasons & regulations

No widespread closed seasons during flathead catfish spawn. Voluntary catch and release during peak spawn weeks is the widely-followed best practice in conservation-minded angling.

Source

Range and timing data sourced from state agency species profiles in major river systems.

Source documentation →

Track water temp for flathead catfish spawn timing.

Bield: Fish ties USGS gauge data and your saved species to spawn thresholds. Get notified when flathead catfish hit pre-spawn temperature in your area.

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